Disable or bypass the headlight leveling sensor?

Mendel Leisk · Aug 9, 2024

dolj said: ↑

There is also an initialization of the sensor (not mentioned in the attached procedure) in LI–19. Again Mendel may care to add this
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I can post that later today.

Mendel Leisk · Aug 9, 2024

dolj said: ↑

Then the next thing to do, if the sensor checks out, is to set the headlight beam level. That procedure is linked LI-80 (actually LI-81), which @Mendel Leisk might care to add to this thread. There is also an initialization of the sensor (not mentioned in the attached procedure) in LI–19. Again Mendel may care to add this.
Click to expand...

Mendel Leisk said: ↑

I can post that later today.
Click to expand...

Attached.

YoJason · Sep 24, 2024 at 4:31 PM

Steven Kelty said: ↑

I have the simplest solution which doesn't require any money.

The component your looking for is the 04 05 06 Toyota Prius Headlight Leveling Control Module 89960-47020 (Headlight beam level control in the third image), which is a black box located in the passenger side dashboard in the 2005 prius (it should be in the same location for 2004). If your headlights are in the proper position, all that needs to be done is to remove the connector from the Module.

Start by removing the lower glove box and the rightmost vent panel(must have the upper glove box open to remove the pannel). Using a light and looking directly into the area once occupied by the vent panel, you should be able to see the black box recessed to the right back. You won't be able to read the sticker that says Headlamp Leveling you'll have a view similar to the second picture but with the unit being plugged in. however there isn't a ECU the same size that is black on that side. make sure your car is off when you unplug the unit.

You should no longer receive the headlight leveling warning, no need to look at the undercarriage to find the sensor.

You should also check your cabin air filter while the glove compartment is off, mine was filthy.

Hope this helps, -S
Click to expand...

Thank you, you saved me some time and money on this. My sensor was in pieses inside and one of the connector blades was broken in he switch. This worked well thank you

Disable or bypass the headlight leveling sensor?

Mendel Leisk Senior Member

Mendel Leisk Senior Member

Attached Files:

2nd gen - headlight levelling device - initialization.pdf

2nd gen - Headlight Aiming.pdf

YoJason New Member

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Disable or bypass the headlight leveling sensor?

Mendel Leisk Senior Member

Mendel Leisk Senior Member

Attached Files:

2nd gen - headlight levelling device - initialization.pdf

2nd gen - Headlight Aiming.pdf

YoJason New Member