Common Toyota Highlander Problems: Causes and Fixes

The Toyota Highlander is one of the best SUVs on the market. It is known for its reliability and prowess. Not only is it a great all-wheel drive option, but its hybrid model also offers many features and trims that make it an ideal inner-city car.

However, it is prone to faults like any other car make and model. Keep reading to learn more about common Toyota Highlander problems, causes, and fixes.

Why is my Toyota Highlander not starting?

There can be many reasons why your Highlander won’t start. But, there are fewer things to troubleshoot than if it were cranking but will not start. Here are some of the most common issues that cause a vehicle not to crank:

Battery

This is the number one cause of starting problems. It is also very easy to detect because the starter motor does not turn or almost does not (it seems to have difficulties), and the lights tend to decrease in intensity.

Battery concerns often arise during changing temperatures/seasons. First, try jump-starting your vehicle.

Battery Cables

While the battery cables are not necessarily the most likely issue to cause your Highlander not to start, they are some of the easiest to diagnose. First, you can take a look at the battery poles where the cables connect. If there appears to be green or white corrosion all around it, cleaning them may help get you back on the road.

Battery Charge

If your battery no longer has enough charge to turn the starter, your Highlander will not start. In addition, as a battery ages, its “cranking amps” decrease, leaving it with a diminished capacity for starting the vehicle.

You’ll often hear the vehicle crank slowly but not start when this happens.

You can take your battery up to the local parts store or Wal-Mart and have it tested to see if it is still holding a charge.

The battery is Dead– If it’s dead but charges back up and tests “good,” it would be time to check the battery terminals or have the alternator tested and see if it is properly charging the battery.

The battery is Charged– If the battery is charged, it would still be advisable to look at the battery cables and see if there is a corrosion issue. Otherwise, the issue may be the starter.

A bad alternator can cause your battery to lose enough charge to start your Highlander. It may have had enough energy to get you home, but when you start the vehicle, there’s not enough stored energy for the engine to turn over.

IBS

A problem with IBS (intelligent battery system) can lead to the inability to start. This device is intended to check the battery charge before starting. If it is not good, the unit prohibits all starting. And when it malfunctions, it can prevent the car from starting wrongly. You just have to unplug it for the car to start again.

Starter

The starter can also be the cause of this problem. It tends to stop working overnight without necessarily having any warning symptoms. This is because the carbons (used to transmit current to the moving rotor) get dirty, and the starter does not work anymore.

Sometimes it is enough to give a few blows of the hammer to extend its life a little. This can be useful when you are far from home and in a hurry. Also, read how to diagnose a defective starter motor.

Spark plugs

First, change the candles without thinking they are already a few years old. The role of the spark plugs is to generate an electric arc that will ignite the fuel. If this arc has trouble forming, it will have difficulty igniting, so you have trouble getting started.

PMH sensor

This sensor (located towards the flywheel) allows ignition timing but can cause starting problems.

AAC sensor

The camshaft sensor (located near the top of the engine) has often been the culprit for hard starting.

Other sensors

A problem with the cooling water temperature sensor can interfere with start-up. Other sensors may be involved, especially on modern engines, which have them because the computer needs a lot of data to run the engine.

Fuel pump

The fuel pump could be the cause because if it no longer sends anything to the engine, it will no longer be able to “feed” and start. However, its relay can also be responsible.

Air intake

In some cases, an air intake in the fuel or intake system causes problems when starting.

Electronic / Immobilizer

A minor problem with the immobilizer will prevent your engine from starting.

Central computer

Linking a modern car’s electronic elements (multiplexed wire system) could logically cause a starting problem if it malfunctions.

Engine ECU

Suppose the engine ECU has a problem or one of its buses (communication wire in a multiplexed architecture intended to reduce the number of cables). In that case, you may have difficulty switching your car.

Blown fuse

A blown fuse could also be responsible for your Highlander’s breakdown. Therefore, checking all important fuses in the fuse box under the hood is recommended.

Ignition / distributor coils

The ignition coils can also be involved. These are used to send juice to the spark plugs so that they generate a spark (electric arc). It is the same on old engines with an out-of-service distributor (it distributes electricity for each spark plug and at the right time).

Injection problem

This is the problem to be feared because the injectors are very expensive. The other symptom that announces a weak injector is the presence of smoke at start-up and suspicious clicking/rattling.

If you still can’t diagnose your Toyota Highlander after checking everything mentioned in this article, then it’s recommend to call the dealership / workshop and let the professional take over.

It can be very frustrating when a vehicle won’t start. Many different issues can cause the problem. This article is written with the assumption that you are looking for a way to get your Toyota Highlander started now and is meant to provide you with practical advice to help aid in the diagnosis.

There are two main ways that a vehicle will not start. The first and most common is when it won’t turn over. This just means the engine doesn’t move when you turn the key. The second way your Highlander won’t start is when the engine turns when you engage the starter, but it won’t fire and run on its own.

When the engine isn’t turning over at all, that’s a bit easier to diagnose than when it is cranking but not firing. Just use the jump list below to move to your particular situation.

Fuel Issues

If your Highlander isn’t getting enough fuel or fuel, it may have a bad fuel filter, fuel pump, or fuel injectors. Without the proper fuel getting into the combustion chamber, the Highlander will crank but not start.

Ignition Issues

One of the biggest issues that cause a vehicle to crank but not start is ignition issues. When there is no spark, the engine will not start. You’ll probably have a misfire-related code such as P0300, P0301, etc……..

Ignition issues can be caused by many things, including bad spark plugs, bad coil packs, bad plug wires, computer issues, and more.

Engine Timing

If the engine’s ability to fire the spark plug at the right time is called “timing”. If the plugs are firing at the wrong time, or something has happened to cause the camshaft to no longer be in sync with the crankshaft, your Highlander won’t start.

There will usually be OBDII codes associated with timing related problems, but not always. P0013 is a common camshaft position related code. The crankshaft sensor can go bad as well. When these sensors go bad, it can be impossible for your Highlander to start.

Security

Most modern vehicles come with smart keys that have electronic protection built in. This makes it more challenging for thieves to steal them. There are occasions where this security system will cause the Highlander to not start. You’ll see a security warning when trying to crank the engine though.

Other Issues

There are a lot of issues that can cause your Highlander to not start. That’s why it is so important to check everything. Here’s a great diagnostic chart that covers many different variables.

Common Repairs

Battery Replacement

The battery is considered dead when there isn’t enough charge to start the engine or run electrical components. Normally, the first sign is dim lighting in the interior of the vehicle, and when you try to start it, the engine may crank slowly, or not at all.

A very rapid clicking noise is normally heard if there is any charge left in the battery, but in many cases the vehicle will be completely unresponsive. If the battery is losing charge while driving the vehicle, the battery warning light will illuminate, and the engine may stall.

Fuel Pump Replacement

If the fuel pump leaks or begins making a lot of noise, get it looked at right away. A failing fuel pump will not create enough pressure in the fuel system, possibly causing a loss of engine power or preventing the car from starting. It may also cause the check engine light to come on. More symptoms of a bad fuel pump

Ignition Switch Replacement

When the electrical portion of the ignition switch fails, the vehicle will permanently or intermittently lose power to certain systems and components, depending on the key’s position. As a result, the vehicle may not turn on accessories like the air conditioner, or the vehicle may fail to start. In addition, in sporadic cases, the vehicle may fail to respond to the key being turned or stall while driving. These symptoms may come and go before the ignition switch completely fails.

Ignition Lock Cylinder Replacement

When the ignition switch lock cylinder fails, it can create a situation where the ignition cannot be turned, or it takes much wiggling and shaking before it finally turns. Or, the ignition may turn and run with the key removed or lets the key be removed in any position. Lastly, the lock can fail to release your key or not allow the key to travel into the ignition lock cylinder.

Starter Replacement

Starter motor failure produces one common symptom across all makes and models: When you turn the key, the starter solenoid will click, but the engine will not rotate. You also might hear a whirring or fast spinning noise when the key is turned. In this case, the starter solenoid and starter should be inspected for failure.

Camshaft Position Sensor Replacement

When the computer senses the engine is out of time, it will turn on the check engine light. The engine may stall or even just fail to start. If the engine runs, it will run poorly and get bad fuel mileage.

Crankshaft Position Sensor Replacement

When the computer senses the engine is out of time, it will turn on the check engine light, and the engine may start and stall, or fail to start at all. If the engine runs, it will run poorly, and get bad fuel mileage.

Toyota Highlander Won’t Start When Hot

If you find your Highlander won’t start when hot, more often than not it is caused by a bad starter. This is because as heat increases, the starter motor windings resistance increase. SomeHighlander owners with this issue fit a 2.2KW starter instead of the 1.6KW starter.

Assuming your vehicle’s battery has been tested and is fully charged (if it isn’t, start there) the problem lies in a weak starter motor. When starter motors get too hot, they tend to act up. This is because the copper windings inside the motor increase in resistance, making it harder to spin the engine.

If you lack knowledge with car repair, always consult a professional.

Toyota Highlander Making Clicking Noise, But Won’t Start

Some Toyota Highlander owners experienced their vehicle making a clicking noise but not starting. This problem is largely caused by a weak battery. Alternatively, a malfunctioning starter motor could be to blame. The starter solenoid is not the issue though, as it is the source of the clicking noise.

A vehicle clicking and failing to start is a common problem that is by no means exclusive to the Highlander.

Faulty Battery

The majority of issues stem from a weak or defective battery.

A battery without enough power to start the vehicle will cause a no-start, yet solenoids or relays may still make a clicking noise.

Always have the battery tested first, and confirm connections are clean and tight. Corrosion or poor connections can cause the battery to behave as if it is weak.

Bad battery cables

Damaged battery cables could also be the root-cause, and almost always exhibit the same symptoms as a failing battery.

If the vehicles 12V battery passes a test, then the next likely cause is the starter motor.

The starter motor is an electric motor that functions by electrical current from the 12V battery. The motor spins a gear to turn the engine over. It is engaged by a solenoid.

When the motor wears out, it fails to turn the engine and get it started. However, the solenoid still functions, which is the cause of the clicking noise.

For the Toyota Highlander starter replacement, RepairPal estimates labor costs are between $81 and $102, while parts are priced between $345 and $433 on average.

How much can the Toyota Highlander tow?

Tow capacity of the Highlander is 3,500-5,000 lbs. The towing capacity varies depending on if your model has a gas engine or hybrid powertrain. Highlander models with available 2.5L 4-cylinder engine have a towing capacity of 3,500 lbs. Highlander models with the standard 3.5L V6 engine have a towing capacity of 5,000 lbs.

Direct Shift-8AT 8-speed Electronically Controlled automatic Transmission is matched with the 3.5L V6 engine and Electronically Controlled Continuously Variable Transmission with sequential shift mode is fixed with the 2.5L 4-cylinder engine.

The 2022 Toyota Highlander towing capacity is only possible because of the standard 3.5L V6 engine. How much can a Toyota Highlander tow? This robust SUV offers a maximum towing capacity of 5,000 pounds with the optional tow package installed. Take a look at a few of the key performance features of the 2022 Toyota Highlander below:

A 3.5L V6 engine with 295 hp and 263 lb-ft of torque

Available eight-speed automatic transmission

Available All-Wheel Drive (AWD) with Dynamic Torque-Control

The 2021 Toyota Highlander Towing Capacity

The new Highlander can tow an impressive 5,000 pounds when properly equipped. The exact towing capacity depends on which engine you choose. And that’s another great thing about this SUV – you can choose between a gas engine or a hybrid engine.

Common Toyota Highlander problems by year

2020 Toyota Highlander

The 2020 Highlander is packed with attractive features that almost suggest it should be wearing the Lexus badge instead. It has a combined fuel economy of 25 MPG, a 5,000-pound towing capacity, and the V6 engine musters up 295 horsepower.

However, a massive recall of the 2020 Highlander makes this SUV one that buyers should stay away. Faulty software in the 2020 models would abruptly cut off fuel from the engine, causing a stall even if the car is in motion. Selling for between $30,000 and $40,000, this is one to avoid for your own safety.

While the 2020 redesigned Highlander had a reasonably good reception from critics and consumers alike, it had a couple of reliability woes. The 2020 model was reported to have issues with its fuel tank.

In particular, reports claimed that they could not fill the tank to its advertised maximum capacity of 17.1 gallons. Instead, they only managed to fill up about 12-14 gallons of gas.

Additionally, several reports stated that the Highlander’s AC system could be a hit or miss. Apparently, the AC condenser was prone to damage, and as a result, the AC stopped blowing cool air. A simple fix is to replace the condenser, which may cost between $60 to $150, including labor.

2019 Toyota Highlander

The 2019 has only four complaints, but there are several reported to the NHTSA, which deal with fuel systems, engine, and brake problems, so it’s best to avoid this one.

The 2019 Highlander is still too new to have accumulated many complaints. However, there are signs that the vehicle has premature engine problems that could be costly and annoying to fix.

Drivers have reported that the engine will stall unexpectedly while driving, or shut down completely. A few individuals have narrowed the problem down to the fuel pump, which is not working effectively.

In January 2020, a fuel pump recall was issued for 2019 Highlanders. However, it was limited in scope. Some drivers have complained that they are experiencing the same problem and were not included in the recall.

2015 Toyota Highlander

The 2015 model clocks in with the most reported against it. One of the biggest complaints drivers have been the front seats.

Owners feel that despite the handling and ride of the vehicle, it means nothing because the seats are extremely uncomfortable. Other vehicles are much more comfortable to sit in. Customers report that they’re downright painful, even if you’re only riding in it for a mere 15 minutes.

Some drivers have to shift their weight now, and then to avoid the bad back and shoulder pain. Unfortunately, by doing that, the seats wear out faster. Added cushions don’t help either.

Another common complaint reported against it is wind noise. Some drivers feel that the noise is overwhelming once the vehicle gets going above 25 mph. Eventually, it was figured out that the noise came from the oversized side mirror design.

Another annoying complaint comes from the navigation and radio display. The screen would freeze up, then reboot itself. When it comes back on, it would return to the default settings, losing what the owner inputted. Drivers found this extremely annoying because it would happen quite often.

2014 Toyota Highlander

Owners have filed relatively few complaints about this Highlander generation. However, some owners note a moldy smell coming from the air conditioning system, issues with the power tailgate becoming stuck in the open or closed positions, and excessive wind noise at highway speeds.

Toyota advises turning off the air recirculation setting to reduce cabin odors, as this forces the vehicle to draw in fresh air from outside. Toyota also identified the power back door actuators as the source of the tailgate problem.

The company replaces them under warranty if they are found to be faulty. The wind noise appears to be caused by a gap between trim pieces on the passenger-side front door (behind the side mirror). Some owners have been able to eliminate the noise by simply applying clear tape over this gap.

2011 Toyota Highlander

The 2011 Highlander was the first model since 2008 not included in the pedal entrapment recall. However, a few reports of unexplained acceleration have still trickled in for this model.

It looks like unexplained acceleration, though frightening, appears rare in the 2011 model. However, another problem is not. Many 2011 drivers have complained of difficulties with the power steering. They said the steering wheel would lock up unexpectedly, or make odd clunking noises.

There’s no apparent fix for this issue, which means drivers have to deal with the noise and sudden turning difficulties while driving independently.

Another minor complaint in the 2011 model involves the driver’s seat visor, which will stop functioning at the hinges, permanently swinging down.

This problem can obstruct the driver’s view and be a mild hazard on the road. However, it’s more of an inconvenience than anything. Some drivers will tape the visor back onto the roof. This fix works, although it can be unsightly.

2008 Toyota Highlander

Owners reported issues like massive oil leaks. Buyers have also reported issues with the ignition coil, sludge build-up, faulty oxygen sensors, rough idling, and airbag sensor issues to list just a few. Additionally, fuel economy comes out to only 21 MPG.

The 2008 model had 13 recalls and over 300 complaints according to the NHTSA. It has been recalled three times for incorrect labels, two times for the airbags, twice for melting window switches, twice for a seat heater that can catch fire, twice for the exhaust tip falling off, and one time each for the seatbelts and accelerator.

The 2008 model also has issues with its power tailgate and air conditioning system. A few owners have also filed complaints regarding engine oil leaks and a clunking noise heard when turning the steering wheel. Toyota developed a new intermediate steering shaft to remedy this clunking. The engine oil leaks stem from a faulty variable valve timing (VVT-i) oil supply hose and an oil cooler pipe.

Toyota is offering free replacement of the VVT-i hose for 2008 models until December 2021. The company will replace the leaking oil cooler pipe of 2008 through 2011 models for free within 10 years of the original purchase date or 150,000 miles – whichever comes first.

Toyota recalled certain 2008 through 2010 Highlander Hybrid models because of an electrical fault within the hybrid inverter assembly, which could cause the vehicle to stall while driving. Toyota replaces the inverter’s Intelligent Power Module (IPM) free of charge.

How to reset maintenance light on Toyota Highlander

Use the following steps to reset the Toyota Highlander maintenance required light;

Put your key in the ignition and turn it to position one (the first setting before actually starting the car).
Quickly push and hold the odometer button on your dashboard, then turn your key to position two.
Continue to hold the odometer button for about 10 seconds. The maintenance light should start to flash, and you may hear a beeping sound. Then the light should go out.
Once the maintenance light is off, let go of the odometer button and turn the key to start your car. The light should be off once your car starts. If it’s still on, repeat this process once or twice more to turn off the maintenance light

How to turn off the seatbelt alarm on a Toyota Highlander

you can disable the seatbelt chime on your Toyota Highlander by following these directions:

Keep your foot off the brake.
Press the start push-button twice.
Press the trip odometer button until you reach the odometer on the instrument cluster display.

Turn the ignition off.
Prepare to put the seatbelt on, but don’t plug it in.
Turn the ignition back on.
Press and hold the trip button for 20 seconds.
Plug in the seatbelt while holding the trip button.
If everything is done correctly, you should see a message on the odometer that lets you turn the beep or chime on or off.

Keep in mind that you will still have the flashing seatbelt sign on the instrument cluster, even if the chime has stopped.

You should never drive without a seatbelt, as it’s dangerous and can even leave you open to getting a ticket. Wearing a seatbelt is important for your safety, just like driving with insurance is important for your safety and that of other drivers. Fortunately, you don’t have to spend a ton to get the coverage you want. Just download the Jerry app and shop for the best deals.

Most newer vehicles are equipped with seatbelt warning chimes. Toyotas are no exception. The seat belt warning chime can easily be disabled. Disabling the alarm is not illegal, in fact, the instructions can be found in your owner’s manual. Follow the procedure outlined to disable the seatbelt alarm in most 2004 and newer Toyota vehicles.

Insert your key into the ignition and turn it to the “On” position. Do not crank the engine.
Press the small knob on your instrument cluster to cycle between your trip odometer and your odometer reading. Press the knob until it displays “ODO.” Turn the ignition to the “Off” position.
Turn the ignition back to the “On” position and hold the small knob for 10 to 15 seconds. After the time has passed, put on your seat belt (while holding the knob).
Release the trip odometer knob to finish. Your instrument cluster will display “B off.”

How many gallons of fuel can a Toyota Highlander hold?

The Toyota Highlander has gas tank sizes ranging from 17.1 gallons to 19.8 gallons depending on the trim level, model options, and model year.

For example, the 2022 Toyota Highlander Hybrid LE AWD trim has a 17.1 gallon gas tank while the 2003 Toyota Highlander 4 Cyl. SUV 4D 2WD trim has a 19.8 gallon gas tank.

A large gas tank may reduce your time spent at the fuel station, but you also need to know how far that full gas tank will get you.

The fuel tank range depends on your vehicle’s fuel mileage and whether you’re driving in the city or on the highway.

Which Toyota highlander has captain seats?

The 2020 Toyota Highlander XLE, Limited, and Platinum trims come with second-row captain’s chairs . The Platinum trim only comes with captain’s chairs . The Highlander models with second-row bench seats have a max seating capacity of eight. Highlander models with the captain’s chairs bring that capacity down to seven.

The 2020 Toyota Highlander XLE, Limited, and Platinum trims come with second-row captain’s chairs. The base L and LE trims come standard with a second-row bench seat. The XLE and Limited trims can substitute in a second-row bench seat at no cost. The Platinum trim only comes with captain’s chairs. The Highlander models with second-row bench seats have a max seating capacity of eight. Highlander models with the captain’s chairs bring that capacity down to seven.

What does the snow button do on a Toyota highlander?

These modes are designed to bolster traction in the respective off-road conditions.

The snow mode, particularly, aids other safety features in preventing wheel slippage and undue wheel spin for optimum snow driving performance.

Snow mode uses the transmission in second gear instead of the first, resulting in less torque on the wheels and less slipping in bad weather. Second, change the pattern of baud rate changes, especially when speeding or pinging. The transmission shifts faster to a higher gear, so when the transmission moves upwards, the tires are more likely to slip in bad conditions, and when you shift to faster gear, you don’t just shift one gear.

With an 8.0-inch ground clearance, the Highlander can hold its own when dealing with up to 5-6 inches of snow.

It could even go a bit more with appropriate and well-fitting snow gear.

How to remote start a Toyota highlander

Remote start procedure for Highlander

You can remotely start your Toyota Highlander by following these simple steps:

Press and release the LOCK button twice within two seconds on the key fob of your Highlander.
Then press and hold the LOCK button on the key fob for three seconds.
The turn signal lights flash multiple times, and the engine starts.
Once started remotely, the engine will run for 10 minutes and then shut down automatically.

For safety reasons, the engine will turn off if you open any door on your Highlander when the engine is running after the remote start. A valid key must be inside your vehicle to switch the ignition on and drive your vehicle.

Remotely stop Highlander’s engine

There are two methods to shut off Highlander’s engine remotely.

Method 1: Press the UNLOCK button on the key fob. The engine stops, and the hazard lights flash twice. If no action is taken, the doors will be unlocked in this method and re-locked shortly after.

Method 2: Press and hold the LOCK button on the key fob for two or more seconds on your Toyota Highlander. The engine stops, and the hazard lights flash once. This method will keep the doors locked after the engine is shut off. You should use this method if you have any security concerns.

How to set the cruise control on a Toyota highlander

The cruise control has the function of maintaining a set speed and is generally used on motorways. It’s practical because you no longer need to keep your foot on the accelerator, and it is very pleasant during long journeys where you spend your time making sure you maintain a stable speed.

Press the cruise control main switch to activate the cruise control.
A dynamic radar cruise control indicator will come on, and a message will be displayed on the multi-information display. Press the switch again to deactivate the cruise control.
If the cruise control main switch is pressed and held for 1.5 seconds or more, the system turns on in constant speed control mode. (→ Selecting constant speed control mode)
Accelerate or decelerate, with accelerator pedal operation, to the desired vehicle speed (at or above approximately 20 mph [30 km/h]) and press the “-SET” switch to set the speed.
The cruise control “SET” indicator will come on.

The vehicle speed when the switch is released becomes the set speed.

Adjusting the set speed

To change the set speed, press the “+RES” or “-SET” switch until the desired set speed is displayed.
Increases the speed (Except when the vehicle has been stopped by system control in vehicle-to-vehicle distance control mode)
Decreases the speed
Fine adjustment: Press the switch.
Large adjustment: Press and hold the switch to change the speed and release when the desired speed is reached.

In the vehicle-to-vehicle distance control mode, the set speed will be increased or decreased as follows:

For the US mainland and Hawaii

Fine adjustment: By 1 mph (1.6 km/h) *1 or 1 km/h (0.6 mph) *2 each time the switch is pressedLarge adjustment: Increases or decreases in 1 mph (1.6 km/h) *1 or 1 km/h (0.6 mph) *2 increments for as long as the switch is held

For Canada and Puerto Rico

Fine adjustment: By 1 mph (1.6 km/h) *1 or 1 km/h (0.6 mph) *2 each time the switch is pressed large adjustment: Increases or decreases in 5 mph (8 km/h) *1 or 5 km/h (3.1 mph) *2 increments for as long as the switch is held

In the constant speed control mode (→ Selecting constant speed control mode), the set speed will be increased or decreased as follows:

Fine adjustment: By 1 mph (1.6 km/h) *1 or 1 km/h (0.6 mph) *2 each time the switch is pressed

Large adjustment: The speed will change while the switch is held.

*1 When the set speed is shown in “MPH” *2 When the set speed is shown in “km/h.”

Increasing the set speed by the accelerator pedal

Accelerate with accelerator pedal operation to the desired vehicle speed
Press the “-SET” switch

Changing the vehicle-to-vehicle distance (vehicle-to-vehicle distance control mode)

Pressing the switch changes the vehicle-to-vehicle distance as follows:

Long
Medium
Short

The preceding vehicle mark will also be displayed if a vehicle is running ahead of you.

Vehicle-to-vehicle distance settings (vehicle-to-vehicle distance control mode)

Select a distance from the table below. Note that the distances shown correspond to a vehicle speed of 50 mph (80 km/h). Vehicle-to-vehicle distance increases/decreases vehicle speed. When the vehicle is stopped by system control, the vehicle stops at a certain vehicle-to-vehicle distance depending on the situation.

Distance options (Vehicle-to-vehicle distance)

Long – Approximately 160 ft. (50 m)
Medium – Approximately 130 ft. (40 m)
Short – Approximately 100 ft. (30 m)

Resuming follow-up cruising when the vehicle has been stopped by system control (vehicle-to-vehicle distance control mode)

After the vehicle ahead of you starts off, press the “+RES” switch.
Your vehicle will also resume follow-up cruising if the accelerator pedal is depressed after the vehicle ahead of you starts off.

Canceling and resuming the speed control

Pressing the cancel switch cancels the speed control.
The speed control is also canceled when the brake pedal is depressed. (When the vehicle has been stopped by system control, depressing the brake pedal does not cancel the setting.)
Pressing the “+RES” switch resumes the cruise control and returns vehicle speed to the set speed.

Approach warning (vehicle-to-vehicle distance control mode)

When your vehicle is too close to a vehicle ahead, and sufficient automatic deceleration via the cruise control is not possible, the display will flash and the buzzer will sound to alert the driver. An example of this would be if another driver cuts in front of you while you are following a vehicle. Depress the brake pedal to ensure an appropriate vehicle-to-vehicle distance.

Warnings may not occur when;

In the following instances, warnings may not occur even when the vehicle-to-vehicle distance is small.

When the speed of the preceding vehicle matches or exceeds your vehicle’s speed
When the preceding vehicle is traveling at an extremely slow speed
Immediately after the cruise control speed was set
When depressing the accelerator pedal

How do I update my Toyota highlander navigation system?

Access to the most current maps will allow you to use your navigation system more conveniently and accurately.

Below are instructions to perform a map update using a computer with windows os:

Download and install the map update toolbox:
Select download map update toolbox for windows and save the “mapupdatetoolbox-inst.exe” to your desktop.
Once downloaded, open the file and follow the instructions. Then, run the installer program as you would for any other software.

Create a backup:

Click the icon on your desktop to open the map update toolbox.
Insert the SD card from your vehicle into your computer to connect it to the map update toolbox.
You will be prompted to create a backup of the SD card contents. You will need the backup to restore your information if your SD card becomes corrupted during the map update process. Therefore, it is highly recommended that you perform the backup process at this time.

When backup is complete, log into map update toolbox by selecting not logged in from the top menu.
Sign in using your username and password. If you have not yet registered, select create a user profile to do so now.

Install map updates:

Log into map update toolbox.
A button will appear on the left side menu. If an update is not currently available, the button will be labeled “device.” if an update is available, the button will be labeled, “updates.”
Select updates, if available. (very important: be sure to read the entire “please note” section before beginning this process.)
Select install to begin the process.
Finish the map update process:
Once the update is complete, it is advisable to create a new backup of the SD card contents.
Select backups from the left side menu.
Select create backup.
Once backup is finished, you may remove the SD card and insert it back into your vehicle.
Osx operating system instructions
Below are instructions to perform a map update using a computer with mac os:
Download and install map update toolbox:
Select download map update toolbox for osx.
Once downloaded, locate the downloads folder.
Open toyota-toolbox.pkg and follow instructions. Run the installer program as you would for any other software. The toolbox will install to your applications folder.

Install map updates:

Insert the SD card from your vehicle into your computer.
Open the map update toolbox from your applications folder.
If an update is available, a button prompting to download latest content will display.
Select download latest content to begin the process.
Once completed, the toolbox will display SD card is up-to-date. Select exit toolbox.
Properly eject the SD card from your computer. Once removed, insert it back into your vehicle.
How to change the clock on Toyota highlander
You can change the time on your Toyota Highlander by following the steps below:
Press the display button until the option to set your clock comes up.
Press and hold the display button again to enter the clock settings.
Use the arrow buttons to change the time.
Press the display button again to set the time.

Toyota Highlander blind spot monitoring (BSM) not working

The Blind Spot Monitor is a system that uses rear side radar sensors installed on the inner side of the rear bumper on the left and right side to assist the driver in confirming safety when changing lanes.

Start by checking if the feature has been deactivated. Then inspect the radar sensor to see if they are operational.
Inspect the Meter control switches that turn the Blind Spot Monitor on/off. When the BSM function is disabled, the BSM OFF indicator illuminates.
Then check the outside rear-view mirror indicators

When a vehicle is detected in a blind spot of the outside rear view mirrors or approaching rapidly from behind into a blind spot, the outside rear view mirror indicator on the detected side will illuminate. If the turn signal lever is operated toward the detected side, the outside rear view mirror indicator flashes.

Check this too: What Is Power Mode In Toyota Highlander?

Note:

Outside rear-view mirror indicator visibility

In strong sunlight, the outside rear view mirror indicator may be difficult to see.

When “Blind Spot Monitor Unavailable” is shown on the multi-information display

Ice, snow, mud, etc., may be attached to the rear bumper around the sensors. (→ To ensure the system can operate properly) The system should return to normal operation after removing the ice, snow, mud, etc. from the rear bumper. Additionally, the sensors may not operate normally when driving in extremely hot or cold environments.

When “Blind Spot Monitor Malfunction Visit Your Dealer” is shown on the multi-information display

There may be a sensor malfunction of misaligned. Have the vehicle inspected by your Toyota dealer.

Lastly, ensure you maintain the following conditions to aid the system.

To ensure the system can operate properly;

Blind Spot Monitor sensors are installed behind the left and right sides of the rear bumper respectively. Observe the following to ensure the Blind Spot Monitor can operate correctly.

Keep the sensors and the surrounding areas on the rear bumper clean at all times.

If a sensor or its surrounding area on the rear bumper is dirty or covered with snow, the Blind Spot Monitor may not operate and a warning message (→ When “Blind Spot Monitor Unavailable” is shown on the multi-information display) will be displayed. In this situation, clear off the dirt or snow and drive the vehicle with the operation conditions of the BSM function (→ The Blind Spot Monitor is operational when) satisfied for approximately 10 minutes. If the warning message does not disappear, have the vehicle inspected by your Toyota dealer.

Do not attach stickers to the sensor or surrounding area on the rear bumper.
Do not subject a sensor or its surrounding area on the rear bumper to a strong impact.If a sensor is moved even slightly off position, the system may malfunction and vehicles may not be detected correctly.In the following situations, have your vehicle inspected by your Toyota dealer.
A sensor or its surrounding area is subject to a strong impact.
If the surrounding area of a sensor is scratched or dented, or part of them has become disconnected.
Do not disassemble the sensor.
Do not modify the sensor or surrounding area on the rear bumper.
If a sensor or the rear bumper needs to be removed/installed or replaced, contact your Toyota dealer.
Do not paint the rear bumper any color other than an official Toyota color.

How to Turn the Blind Spot Monitor on/off

Use the meter control switches to turn on/off the function.

For 4.2-inch display;

Press < or > of the meter control switches and select the settings icon.

Press ^ or ^v of the meter control switches to select BSM and then press OK.

For 7-inch display;

Press < or > of the meter control switches and select.

Press ^ or ^v of the meter control switches to select BSM and then press OK.

Blind Spot Monitor operation

Vehicles that can be detected by the Blind Spot Monitor

The Blind Spot Monitor uses rear side radar sensors to detect the following vehicles traveling in adjacent lanes and advises the driver of the presence of such vehicles via the indicators on the outside rear-view mirrors.

Vehicles that are traveling in areas that are not visible using the outside rear view mirrors (the blind spots)
Vehicles that are approaching rapidly from behind in areas that are not visible using the outside rear-view mirrors (the blind spots)

The Blind Spot Monitor detection areas

The areas that vehicles can be detected in are outlined below.

The range of each detection area is:

Approximately 1.6 ft. (0.5 m) to 11.5 ft. (3.5 m) from either side of the vehicle *1
Approximately 3.3 ft. (1 m) forward of the rear bumper
Approximately 9.8 ft. (3 m) from the rear bumper
Approximately 9.8 ft. (3 m) to 197 ft. (60 m) from the rear bumper *2

*1The area between the side of the vehicle and 1.6 ft. (0.5 m) from the side of the vehicle cannot be detected.

*2The greater the difference in speed between your vehicle and the detected vehicle is, the farther away the vehicle will be detected, causing the outside rear view mirror indicator to illuminate or flash.

Note:

The Blind Spot Monitor is operational when all of the following conditions are met:

The Blind Spot Monitor is on.

The shift lever is in a position other than R.

The vehicle speed is greater than approximately 10 mph (16 km/h).

The Blind Spot Monitor will detect a vehicle when

The Blind Spot Monitor will detect a vehicle present in the detection area in the following situations:

A vehicle in an adjacent lane overtakes your vehicle.
You overtake a vehicle in an adjacent lane slowly.
Another vehicle enters the detection area when it changes lanes.

Conditions under which the system will not detect a vehicle

The Blind Spot Monitor is not designed to detect the following types of vehicles and/or objects:

Small motorcycles, bicycles, pedestrians, etc. *
Vehicles traveling in the opposite direction
Guardrails, walls, signs, parked vehicles, and similar stationary objects *
Following vehicles that are in the same lane *
Vehicles traveling two lanes away from your vehicle *
Vehicles that are being overtaken rapidly by your vehicle *

*Depending on the conditions, vehicle and object detection may occur.

Conditions under which the system may not function correctly

The Blind Spot Monitor may not detect vehicles correctly in the following situations:

When the sensor is misaligned due to a strong impact on the sensor or its surrounding area
When mud, snow, ice, a sticker, etc. is covering the sensor or surrounding area on the rear bumper
When driving on a road surface that is wet with standing water during bad weather, such as heavy rain, snow, or fog
When multiple vehicles are approaching with only a small gap between each vehicle
When the distance between your vehicle and the following vehicle is short
When there is a significant difference in speed between your vehicle and the vehicle that enters the detection area
When the difference in speed between your vehicle and another vehicle is changing
When a vehicle enters a detection area traveling at about the same speed as your vehicle
As your vehicle starts from a stop, a vehicle remains in the detection area
When driving up and down consecutive steep inclines, such as hills, dips in the road, etc.
When driving on roads with sharp bends, consecutive curves, or uneven surfaces
When vehicle lanes are wide, or when driving on the edge of a lane, and the vehicle in an adjacent lane is far away from your vehicle
When towing a trailer
When an accessory (such as a bicycle carrier) is installed to the rear of the vehicle
When there is a significant difference in height between your vehicle and the vehicle that enters the detection area

Immediately after the Blind Spot Monitor is turned on

Instances of the Blind Spot Monitor unnecessarily detecting a vehicle and/or object may increase in the following situations:

When the sensor is misaligned due to a strong impact to the sensor or its surrounding area
When the distance between your vehicle and a guardrail, wall, etc. that enters the detection area is short
When driving up and down consecutive steep inclines, such as hills, dips in the road, etc.
When vehicle lanes are narrow, or when driving on the edge of a lane, and a vehicle traveling in a lane other than the adjacent lanes enters the detection area
When driving on roads with sharp bends, consecutive curves, or uneven surfaces
When the tires are slipping or spinning
When the distance between your vehicle and a following vehicle is short
When an accessory (such as a bicycle carrier) is installed to the rear of the vehicle

DAC not available Toyota highlander

Toyota’s downhill assist control system helps the vehicle maintain a constant low speed of about 3 mph when descending a steep hill. The downhill assist feature functions without brake pedal operation.

If you cannot detect your car’s Downhill Assist Control, check to see if it has been turned off.

How to Turn on Toyota’s Downhill Assist Feature

Activate Downhill Assist Control by pressing the switch on the center console. The DAC light comes on to let you know the system is operational.

As you head down the hill, Downhill Assist Control brakes individual wheels to maintain control and a safe rate of descent without any driver intervention. While the downhill assist control system is operating, the slip indicator will flash, indicating that the system is operating. This will make the stop lights and high mounted stoplight will turn on.

How to Turn off Toyota’s Downhill Assist Feature

Activate the downhill assist control system by pressing the “DAC” switch.
The downhill assist control system indicator will turn on, confirming the system is activated.
Simply press the switch again to turn the system off.

The Downhill Assist Control system will not operate in the following situations:

The shift lever is not in 1 range of s mode or r
The vehicle speed is higher than 15 mph

Note: If the accelerator or brake pedal is depressed, the downhill assist control system will stop operating with the downhill assist control system indicator still on.

How to turn on 4WD on Toyota highlander

Follow these steps to use four-wheel drive in your Toyota Highlander:

Step 1: Turn on your car.

Step 2: Press the button labeled 4WD on your gear shift.

Step 3: Your car should switch to four-wheel drive.

Just hit the same button to turn off four-wheel drive in your Toyota Highlander. Remember, four-wheel drive is convenient for handling tough terrain, but it also burns gas faster than you normally would. So, ensure you have plenty of fuel and try only using four-wheel drive when you need more control.

How to replace the battery on a Toyota highlander key fob

To replace a Toyota Highlander key battery, you should start by purchasing a CR2032 battery—it only costs about $5.00. Once you have your new battery, follow these steps:

Step 1: Pry off the rear cover with a flathead screwdriver or another and remove the remote control.

Step 2: Loosen the clips holding the circuit board in place.

Step 3: Gently lift the circuit board to reveal the old battery.

Step 4: Replace the old battery with the new one and reassemble the keyfob.

Step 5: Test the key! If it doesn’t work, adjust the battery’s position and try again. If it still doesn’t work, your problem may not be battery-related.

All Toyota highlander transmission recalls explained

Below are the transmission based recalls;

Fuel system, gasoline: Delivery

Recall date: 2020-03-18

Recall no.: 20V162000

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020 Highlander vehicles equipped with a 3.5 L, V6 (2GR-FKS) gasoline engine. Due to an Engine Control Unit (ECU) programming error, fuel may not be correctly supplied to the engine while using the stop and restart feature.

Recall consequence

Improper fuel supply programming can result in a vehicle stall, increasing the risk of a crash.

Recall action

Toyota will notify owners, and dealers will reprogram the ECU. The recall began on May 15, 2020. Owners may contact Toyota customer service at 1-888-270-9371. Toyota’s number for this recall is 20TA06.

Fuel system, gasoline: Delivery: Fuel pump

Recall date: 2020-01-12

Recall no.: 20V012000

Toyota Motor Engineering & Manufacturing (Toyota) recalled certain 2018-2019 Highlander

Recall consequence

If the fuel pump fails, the engine can stall while driving, increasing the crash risk.

Recall action

Toyota will notify owners, and dealers will replace the fuel pump free of charge. The recall began on May 4, 2020. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Toyota’s numbers for this recall are 20TB02 and 20TA02 for Toyota vehicles.

Fuel system, gasoline: Delivery: Hoses, Lines/piping, and fittings

Recall date: 2014-09-18

Recall no.: 14V576000

Toyota Motor Engineering & Manufacturing (Toyota) is recalle the 2014 Highlander. As a result, fuel may leak from one of the fuel delivery pipes in the engine compartment.

Recall consequence

A fuel leak in the presence of an ignition source increases the fire risk.

Recall action

Toyota will notify owners, and dealers will replace any suspect fuel delivery pipes free of charge. The recall began on November 17, 2014. Owners may contact Toyota customer service at 1-800-331-4331.

Toyota Highlander Alarm Keeps Going Off

The most common reason for a Toyota Highlander alarm going off at random is due to a faulty hood switch or faulty door switch. Another common cause is that the 12V battery is about to die.

If your Highlander alarm keeps going off randomly without something obvious triggering it, the anti-theft system is not working as intended.

Outlined below are the most likely causes for your alarm going off randomly:

Faulty Hood Switch/Door Switch

Hood and door switches are responsible for triggering the alarm in the event of someone trying to forcibly enter your Highlander. When the vehicle is locked with the fob, the anti-theft system is armed.

So, if the door or the hood is opened or unlocked by force while the system is armed, it will trigger the alarm. A faulty hood switch or door switch can cause the alarm to go off even when the door/hood is not being opened.

It’s important to remember that the hood latch and door latches should be cleaned, lubricated, and free of debris. If the hood/doors are not closing properly, it could cause the switch to trigger the alarm.

12V Battery

The first thing to check when dealing with this issue, is the anti-theft system’s power source – the vehicle’s 12V battery. A battery that is on the brink of failure or about to die can cause the alarm to go off.

This is because the anti-theft system triggers the alarm when power is interrupted while the system is armed. So, having the battery tested and replaced if necessary, is always the best place to start when dealing with this concern.

You can always check with a voltmeter, by measuring the voltage across the battery’s terminals. If it’s under 11V then this is causing the problem. If you’ve had the battery for more than three to four years it might be time for a new one. Also, ensure your battery connections are tight and clean.

Glass Breakage Sensor (GBS) ECU

The Highlander security system comes equipped with a glass breakage sensor. This sensor can detect tapping or breakage of the glass, which then sounds the alarm. The sensor is controlled by an electronic control unit (ECU) behind the glove box. There is an adjustment screw on the GBS ECU to control the system’s sensitivity.

The sensitivity may be set too high, causing the alarm to be triggered by occurrences such as lightning storms or large gusts of wind. Always follow Toyota’s recommendation when setting the sensitivity.

Most Highlander owners found their vehicle was beeping at them with no indication because the parking brake was slightly engaged, or they set something on the passenger’s seat (such as a bag of groceries). Other problems could be defective door switches or park assist sensors.

The Toyota Highlander can beep at you for many different reasons, but when it is seemingly random or spontaneous, it can frustrate owners.

Usually, this is an easy fix.

Start by checking the parking brake, the passenger’s seat, and the doors. If the parking brake is engaged while the vehicle is in motion, the Highlander will try to indicate the driver to release it by beeping.

Rightfully, driving with the parking brake engaged will wear out brake pads and make them less effective. Another incident that can cause beeping is objects placed on the passenger’s seat.

The seat has weight sensors used to determine if the airbag should be deployed or not and used to activate the passenger’s seatbelt indicator. If the seat weight sensors detect a load on the passenger’s seat, but the seatbelt is disconnected, an audible chime will follow.

Connect the passenger seatbelt if you wish to place items on the passenger seat while driving without the beeping.

Also, check that all the doors and the rear hatch are closed properly.

If all of these conditions are met, the problem could lie in a defective door switch, leading the Highlander electronic system to think a door is open while the vehicle is in motion.

A park assists sensor could also be to blame.

Toyota’s park assist sensors are sensitive, and a small amount of dirt, moisture, or damage could cause them to chime continuously. However, it will most likely display it on the Multi-Information Display (MID).

You may also be interested in our article: Toyota Highlander Beeping?

Toyota Highlander Keeps Cutting Out

Usually, when owners experience their Highlander cutting out, it is due to an electrical problem in the main battery/ignition circuit. This electrical problem could be caused by a loose or corroded ground cable, a defective ignition relay, or poor contact between battery terminals and posts.

Highlander owners have reported that their vehicle would abruptly lose all electrical and engine power.

This adverse situation can leave drivers without power steering, power brakes, acceleration, exterior lights, driver assists, etc. This issue can take extensive diagnosis, and finding the root cause can be tricky. Therefore, labor costs will vary depending on how easily your mechanic can locate the source of the problem.

However, according to our research, the main causes of this complaint were:

Loose/corroded battery terminals
Loose/corroded electrical ground cable
Loose electrical cable connected to fuse box
Defective ignition relay

Due to the technical nature of this concern, we recommend leaving your vehicle in the hands of a trained professional, specifically an auto-electrician.

Toyota Highlander Glove Box Keeps Opening

When the glove box of your Highlander keeps opening, it is usually caused by a broken latch. Unfortunately, latches cannot be replaced individually, so the entire glove box must be replaced. Before buying one, ensure nothing is jammed in the way of the latch or the sides of the glove box.

When this problem occurs, owners should check to ensure the box is not overloaded and an item does not jam the mechanisms (such as the hinges or latch).

But if this is not the case, a latch may have gone bad. When the latch breaks, it can no longer support the box’s weight and keep the glove compartment closed.

The latches cannot be replaced individually, so the whole glove box must be interchanged.

On a light note, this repair is relatively easy, so “DIYers” should have no issue attempting this repair as long as they have some basic hand tools.

The box can be pricey, sometimes ranging into hundreds of dollars. For those on a tight budget, a used one might be a better option.

Toyota Highlander Headlights Keep Burning Out

Headlight bulbs should not require frequent replacement. If you find the bulbs burn out all too often on your Highlander, check your alternator output or for moisture inside the headlight. It’s also important to wear gloves when installing bulbs, oil from fingers can decrease bulb life.

A common cause of decreased headlight bulb longevity lies in the installer not wearing gloves. This is because the oil on your hands disrupts the uniform heating process.

But if you always wear gloves when changing bulbs, it may be due to moisture in the headlight assembly itself. Headlight assemblies should be sealed and free of any moisture. If not, this moisture can cause the bulb to fail prematurely.

Lastly, the alternator output voltage should be checked. If the voltage regulator in the charging system fails, excessive voltage can be sent to the headlights causing them to overheat and burn out.

Toyota Highlander Windows Keeps Going Down

Some Highlander owners have noticed that their driver’s window goes down after they’ve turned off their vehicle and walked away. Fortunately, this is an easy fix, usually caused by slamming the door too hard.

You will see a black plastic plug near your door handle.
Pry it out with a small screwdriver. Shine a flashlight in the hole you will see a red plastic connecting link that should have a metal rod with a 90-degree bend sticking through it.
Then take a stiff wire, bend a hook on the end, and carefully lift the rod back.
You may have to push it back in the hole with a thin screwdriver while lifting it with the wire.
Also, leave the key in the lock and have someone turn it slowly to help line up.
If you feel comfortable removing the door panel, this might be easier, although you’ll have to deal with many clips.

Toyota Highlander doors Won’t Lock

Usually, when the Highlander doesn’t lock, the cause of concern lies in a fob being left in the vehicle or the doors not being closed all the way. However, if this is not the case, it may be caused by a dead key fob battery, worn-out door lock actuator, or blown a fuse.

Toyota implements Power Lock and Smart Entry systems in their new vehicles; however, they are not without their share of problems.

Here’s a list of what to look out for when researching why your Highlander won’t lock:

Fob In the Vehicle / Doors Not Closed

If your Highlander has a push-button start, it uses proximity sensors to determine how close the fob is to the vehicle and whether or not it is in the cabin.

The Highlander comes off the lot with two key fobs – meaning one could be left inside the vehicle as you try to lock it with another.

If a key fob is inside the vehicle, it will not lock, especially a smart key.

If you cannot find the key fob anywhere but suspect there still might be one in the cabin of your Highlander, simply try to start it with no known keys inside the vehicle.

If it starts, there must be a key fob inside.

Also, ensure all doors (including the rear hatch) are closed. If not, the door lock system will refuse to operate.

Key Fob Battery Dead

Like many electronic gadgets, the key fob has a battery. This battery is known as a CR2032 battery. It is widely available and only costs around $5. If the battery in the fob goes dead, it needs to be replaced.

A relatively easy task with minimal tools required, and some dealerships may even replace it for you, free of labor charges.

Blown Door Lock Fuse

If the door lock fuse blows, it will prevent the entire door lock system from functioning. In addition, fuses can be easily accessed and inspected by pulling them out of the fuse box.

A blown fuse is usually caused by an electrical short, though, due to exposed or damaged wires or connections.

So if you find a blown door lock fuse, replace it. It may continually blow until the wiring fault is rectified.

Defective Door Lock Actuator

The door lock actuator is an electrical device responsible for moving the lock mechanism when detecting a lock signal from the key fob. A defective door lock actuator typically only causes one door lock to fail, rather than all doors.

This component requires testing and checking for supply voltage and ground presence in the harness connected to the actuator.

Leave the door lock actuator diagnosis and repair to a professional automotive technician due to the technical nature of the problem.

Highlander Won’t Connect To iPhone

When your Highlander won’t connect to your iPhone, you need to confirm that the Bluetooth settings are enabled first on the vehicle and the phone. Also, the system can only hold a max of 5 phones. Delete a device if you have too many. Lastly, check for updates, and check your phone’s compatibility.

Phone connectivity is a common issue for Highlander owners, and iPhone users are no exception. However, there are several quick checks you should perform before you rush it into the service department.

In the Highlander’s settings, ensure your Bluetooth settings are enabled.
The same goes for your phone’s Bluetooth settings.
It may seem obvious, but it is often overlooked.
Understand that most Toyotas (including the Highlander) only allow a max of 5 phones registered.
If you already have 5, you’ll have to delete one if you want to pair a new one.
Reboot the system, and clear the cache.

Just be sure you don’t completely reset or reformat your phone or the Highlander – you may lose all of your data in the process.

Some devices simply are not compatible with Entune.

Always make sure your iPhone is running the latest iOS software, this can often be the root cause of a number of iPhone related issues.

Check this too: Common Toyota Highlander Hybrid Problems And Their Fixes

If all else fails, you may want to contact your local dealer and check for any software updates.

There may be one available for your vehicle, or they may be able to pinpoint why your phone is not connecting.

Toyota Highlander Bluetooth Keeps Disconnecting

When Bluetooth keeps disconnecting from the Highlander, owners found the easiest fix was to delete their phone from the Highlander’s Bluetooth device list, and pair the device again. If this does not work, confirm your phone is compatible with your vehicle, and confirm your Highlander has the latest software update.

If your phone continually disconnects from your Highlander, it’s always best to try a few simple things first before you hand over any money to a technician.

Delete the device from your Highlander’s Bluetooth device list.
Delete the Highlander from your device’s Bluetooth list as well if needed.
If possible, clear the cache or perform a soft reset as well.
Key the vehicle off and back on again, and perform the pairing process. This method fixed the majority of owner’s problems with Bluetooth disconnecting.
Always check your phone for the latest software updates.
Lastly, check with your dealership to confirm your Highlander has the latest update. Toyota is always updating the software on their vehicles to fix glitches and bugs.