toyota highlander cruise control sensor

Toyota Highlander Cruise Control Not Working: How to Fix

The cruise control system is a big plus in any vehicle and if it fails, you’d have to put in some extra work to keep your vehicle moving at a constant speed. However, a Toyota Highlander cruise control failure goes beyond a driving problem and could signify something even more serious.

There are a few reasons why your cruise control system would stop working and there are a handful of fixes that can fix the problem. This article covers some of the common possible causes and the right fixes that should be applied.

But before we dive right into the causes and fixes, we’d take a look at how the cruise control system works.

How the Cruise Control System Works

Toyota highlander cruise control not working: causes, replace the faulty brake pedal switch, replace the speed sensor, check for a blown fuse, replace or fix the vacuum actuator, final thoughts.

The cruise control system setup would depend on the vehicle’s make. In modern vehicles, it makes use of a fully electronic setup which is controlled by the vehicle’s ECU (electronic control unit).

In older vehicles, it could be controlled by a vacuum actuator that is physically connected to a chain or cable. The adjustment of the cable will increase or decrease the throttle position based on the actions of the actuator. This system is called electromechanical cruise control.

Your mechanic will tell you which kind of system your cruise control is based on.

• Faulty Brake Pedal Switch
• Damaged Speed Sensor
• Damaged Mechanical Components

The cruise control system is wired to the brake pedal switch and is meant to disengage whenever the brake pedal is pressed. If the brake pedal switch stays engaged or fails, the cruise control system will remain off.

This fix would require you to replace the brake pedal switch, however, it could require more than that. You may also have to check the wiring connected to the switch for signs of damage.

To get this fixed, you should have your mechanic examine the switch for any signs of damage. The mechanic should also inspect the wires connected to the switch for any damage and change them if necessary. The switch should also be replaced and then the mechanic would confirm it the problem has been solved and the cruise control system working properly.

The speed sensor is also connected to the cruise control system. It if fails, the cruise control system may stop working along with the speedometer and you may notice that your engine would have more difficulty when idling.

Your mechanic would have to examine the speed sensor and its surrounding wires for any signs of damage. If so, the mechanic will have to replace the sensor. If there are any problems with the wires connected to the sensor to the speedometer and the cruise control switches, they would have to be replaced too. This should fix the problem and get the cruise control system working as normal.

The cruise control system is protected by a fuse which prevents it from being damaged due to over-current or a short circuit. If the corresponding fuse for the cruise control system has blown, then the system would stop working.

This fix wouldn’t require a mechanic but if you’re not used to car repairs, then you should leave it to the professionals. All that would be required is to check for the corresponding fuse for the cruise control to see if it has blown. It should be easy to tell if the fuse has blown or failed. If it has, then it should be replaced. When replacing a blown fuse with a new one, only go for those rated for the correct amperage.

If this fix proves too hard for you to perform, then you should drive your car to your mechanic and explain this. Your mechanic should be able to get things done quickly and you won’t have to spend too much on it.

If you’re driving an older model, then your cruise control system probably makes use of a vacuum actuator. This system features a vacuum actuator and a cable connected to the vehicle’s throttle. Together they work to maintain the speed of the vehicle and keep you at a certain distance behind the vehicle in front of you.

If the vacuum actuator fails or there is damage to the hoses, then the cruise control system would stop working. Also, there may be problems with the cable connecting the actuator to the throttle. The cable could be broken.

The vacuum actuator, the hoses, and the cable would have to be checked to ensure they’re in perfect working condition if they’re okay, then the actuator may have to be replaced.

Whenever your mechanic performs a fix and confirms that the cruise control system is in order, you should take it for a test drive to confirm it yourself. With that done, the mechanic will use their code reader to clear any trouble codes that may have been produced when the cruise control system failed.

While you could perform some of these fixes on your own, it is best to get a mechanic on the job. A cruise control failure could be a signal that your car is about to develop a fault in its other components. Your mechanic may also inspect other systems like the brake lights and speedometer to check for faults and make the necessary repairs.

While the cruise control system makes driving on the highway more convenient, it is important to keep an eye on the cruise control system as a sudden failure could be dangerous. If you notice that the cruise control system is failing or stopped working altogether, get a mechanic to check it out immediately.

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Toyota Highlander Owners Manual: Cruise control

Summary of functions.

• Setting the vehicle speed
• Adjusting the set speed
• Canceling and resuming the constant speed control

Using the driving support systems

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Rear wiper rubber REPLACEMENT HINT: Installation is in the reverse order of removal. 1. REMOVE REAR WIPER BLADE ASSY (a) Raise the rear wiper blade assy to the position where the claw disengages with a click sound as shown in the illustration. NOTICE: Be careful not to damage the claw. (b) Pull the re ...

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Cruise Control Distance Sensor. Sensor Assembly, MillIME. Cruise Control Distance Sensor.

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Radar Cruise Control Unavailable clean sensor, 3rd Gen Tacoma

Discussion in ' 3rd Gen. Tacomas (2016-2023) ' started by mfmoeykens , Mar 5, 2019 .

#1 mfmoeykens [OP] Member

I live in Utah and we've had tons of snow this year (2019). Regularly, the sensor behind the Tacoma symbol up front gets covered in slush/snow, turning off my pre-collision and radar cruise control. No, I have not changed out my grill. And yes, I know I can get regular cruise control back by pressing in the cruise control button for a second and a half to turn off radar cruise to get it back up and running. Anyone make a mod yet that heats up the Toyota symbol to melt it off or something? Something like for the side mirrors. Cause, I'd buy it!  

#2 cencal_taco Well-Known Member

I’m not positive, but I think it is not available when too cold. Has nothing to do with being covered. It has happened to me a few times and we don’t get snow. If you look close, there is a snowflake above the icon.  

#3 MrBrooks Well-Known Member

I've had a record snow fall this year & very low temps with 0 issues with mine. Not sure if I'm just lucky or there is an issue with some of these trucks that Toyota needs to address? Been a lot of posts this winter about this!  

#4 mfmoeykens [OP] Member

This is what is looks like when radar cruise control doesnt work.  

#5 Hp5551935 New Member

I live in the DFW Texas area and started getting these warnings as soon as the temp dipped below 40 degrees, this is just wrong!!  

#6 Kwisak Well-Known Member

There was a TSB on these to reseal them. Maybe stop by and see if that’s the case. Prior mine was going off in heavy rain but after I haven’t had a issue but it was after monsoons so next year will tell me the truth  

#7 MrBrooks Well-Known Member

I had the recall done after my sensor completely died right before a 2,800 mile trip. Heavy rain back in June must have waterlogged it & message warning popped up within minutes of driving every single time I drove it. Kinda sucked I didn't have time to get it fixed before I left! Last winter when the truck was still new I had zero issues even with it plastered with snow & ice. In the last few days just a lil snow or ice has triggered the warning twice now. This really has turned into a system that is unreliable which is strange since other Toyota models aren't having the same issues. Why the Tacoma?  

#8 tacothyme Well-Known Member

Speculating here I'd think it's maybe a faulty sensor. A little snow stuck to the center grill piece shouldn't interfere with the radar that's already transmitting through plastic.. Now, if it was snowing super hard or raining super hard, then sure - maybe some issues with the millimeter wave radar. There is a TSB available for the radar sensor. Might be relevant. They put a protective cover over it after doing a diagnostic. https://www.tacomaworld.com/threads...ith-pro-grills-or-lifts.608494/#post-20564835  

#9 TacoTimothy Member

I have a issue hopefully someone here can help with or direct me to the right location. A deer and I had a close encounter, damaged the driver side front, believe it or not my radar still worked great. After the repair i began to have issues, they replaced the radar but I have found that the cover if in place shuts the radar down after 2 to 10 miles of driving. I removed the cover and it works perfect. It's the same cover as before, plus it's plastic, they have calibrated it and it works good for a day then back to same shut down and error on my dash. Any thoughts on what I need to do to fix this? It's the pro grill, not stock, so the radar was dropped down maybe 6 inches,l. This is not the cause as I bought my truck this way and never had an issue. Any ideas would greatly be appreciated. Ps before asked. The old radar was left in originally but would shut down, but with the cover off it worked fine, so I had a new radar installed.  

#10 84-4runner Well-Known Member

Happened to me just last evening. Had to go to Flag (7,000) and it started snowing and cold. It didn't work until I dropped down to above freezing and the snow and ice fell off.  

#11 Buck Henry Well-Known Member

I had that TSB done on my 2019 when I bought it. They basically put a piece of cheap foam tape over the top of the sensor behind the grill to keep slush and mush from getting down to the sensor element. I was pretty pathetic fix, so I went one step further and sealed my sensor on the top and sides with some of that heavy duty Gorilla tape. Nothing can get to my radar sensor now and I have had zero issues since doing my Gorilla tape mod.  

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