[MyToyotaSpot]

Recently noticed that Auto Leveling function is not working when the headlights are on and I start the truck. The appropriate dash light comes on then goes off on the dash during start up. Battery seems good and ive checked that the rear linkage by the driver side rear well seems intact. I also recently purchased OBD Fusion all with the extra Toyota Pack. I ran scan for Network C (if I did it right) and got no error codes....

Does anyone have any ideas on what I can check next?

Ive also been told that maybe disconnect the negative side of the battery for 1/2 to 1 hr might do something? Yes /No ??

Thanks for any tips / ideas.

 

[MyToyotaSpot]

Hoping to do some more troubleshooting today. Any ideas??

Tks in advance…..

 

[normneufeld]

Recently noticed that Auto Leveling function is not working when the headlights are on and I start the truck. The appropriate dash light comes on then goes off on the dash during start up. Battery seems good and ive checked that the rear linkage by the driver side rear well seems intact. I also recently purchased OBD Fusion all with the extra Toyota Pack. I ran scan for Network C (if I did it right) and got no error codes....

Does anyone have any ideas on what I can check next?

Ive also been told that maybe disconnect the negative side of the battery for 1/2 to 1 hr might do something? Yes /No ??

Thanks for any tips / ideas.

View attachment 410003

I had a similar problem with my 2014 Venza. The low beams pointed almost strait down. My auto leveling switch with the linkage on it was faulty. Toyota wanted about $400 for it. I replaced the variable switch with 2 resistors and now they stay fixed at a good level. My linkage was seized when I took it off and that busted the internal variable switch. I’m quite happy with the fix!

 

[MyToyotaSpot]

I had a similar problem with my 2014 Venza. The low beams pointed almost strait down. My auto leveling switch with the linkage on it was faulty. Toyota wanted about $400 for it. I replaced the variable switch with 2 resistors and now they stay fixed at a good level. My linkage was seized when I took it off and that busted the internal variable switch. I’m quite happy with the fix!

Thanks for the reply. As far as I know, mine is an automatic process.

Start truck and headlights move down - up and then into correct position based on vehicle height. I have no off-on switch.

I do know that there is an actuator so to speak that is in the rear of the car which monitors the level of the rear and makes adjustment according to the level of rear according to height that may be effected by let’s say the weight of a trailer.

Mine for some reason have stopped moving on start up.

 

[normneufeld]

Thanks for the reply. As far as I know, mine is an automatic process. Start truck and headlights move down - up and then into correct position based on vehicle height. I have no off-on switch. I do know that there is an actuator so to speak that is in the rear of the car which monitors the level of the rear and makes adjustment according to the level of rear according to height that may be effected by let’s say the weight of a trailer. Mine for some reason have stopped moving on start up.

They all are automatic and I don't have a switch either. I replaced my actuator at the rear of the vehicle with two 1.2k resistors to fool the computer. If you unplug the actuator harness you can test while the ignition is on for 5 volts between the outside two pins. If yes, you can put the resistors in series between the outside pins and then connect the point where the two resistors are joined to the middle pin. If your actuator is faulty, your headlights will now raise to be in a fixed position. As mentioned before, this worked on my Venza and someone else had success with a Prius. You could also bench test the actuator. It's usually only a few 10mm bolts to take off the whole assembly. Pay attention to the pins on the actuator, one of mine was quite corroded. You can also check fuses of course. Here is a picture of the harnes cut and the resistors spliced in where the actuator was:

 

[MyToyotaSpot]

They all are automatic and I don't have a switch either. I replaced my actuator at the rear of the vehicle with two 1.2k resistors to fool the computer. If you unplug the actuator harness you can test while the ignition is on for 5 volts between the outside two pins. If yes, you can put the resistors in series between the outside pins and then connect the point where the two resistors are joined to the middle pin. If your actuator is faulty, your headlights will now raise to be in a fixed position. As mentioned before, this worked on my Venza and someone else had success with a Prius. You could also bench test the actuator. It's usually only a few 10mm bolts to take off the whole assembly. Pay attention to the pins on the actuator, one of mine was quite corroded. You can also check fuses of course.

Ahhh.
Thanks. I’ll see if I can get back under there. It’s the leveling arm with actuator attached - rear height sensor?

I don’t have a lift or stands so it’s a tight fit to get under the truck……. I’m about worn out from looking for the issue. I’ve checked the alternator and then replaced the battery and ordered OBD scanner - returned no fault - which I don’t understand if the part is faulty why an error code would not be returned. We’ll see.

 

[MyToyotaSpot]

So I was hoping to disconnect the connector to the actuator and see if it at least will throw an error code hoping that when I reconnect it, I can clear the code and it’ll reset. But it’s hard to reach, not a lot room and I have no clue and cannot tell how to release the clip. And I don’t want to bust something. Even if I were to undo the bolts and drop the whole asssembly I still have no clue on how to release the clip.

 

[nuke]

Am I correct in assessing auto-leveling headlights as more correctly described to be auto load sensing? That is, they have no method of sensing in the vehicle is traversing, say, a hump in the road surface? So, the headlights are correctly adjusted at the factory or dealer for a level road surface?

 

[MyToyotaSpot]

Am I correct in assessing auto-leveling headlights as more correctly described to be auto load sensing?

In the manual it’s referred to auto leveling. They move up and down they set on engine start up. And also adjust accordingly when the rear is affected due to a trailer let’s say.

 

[normneufeld]

Am I correct in assessing auto-leveling headlights as more correctly described to be auto load sensing? That is, they have no method of sensing in the vehicle is traversing, say, a hump in the road surface? So, the headlights are correctly adjusted at the factory or dealer for a level road surface?

Yes, the device fixed to the rear suspension is designed to compensate for load changes. It is meant to keep your lights at the correct level regardless of suspension load.

 

[MyToyotaSpot]

Well, I feel much better (not) after spending 3 hours today at Toyota of Slidell and having them tell me that all is good with the headlights and I don’t have ALH. Humm, I wonder what they’ve been doing moving these past 4 years when I start the truck!?!!