Drivers controls for windows and lock not working properly

ALCORSINO

MEMBER
2002 TOYOTA SEQUOIA
V8
4WD
AUTOMATIC
297,000 MILES

Shortly after programming a new key fob the drivers master door control only can raise and open the drives side window.

At each door I can control the window like the front passengers, rear left,
rear right at the control at each door with its window. As for the tailgate window, it will work only with the key in the tailgate door.

So.

1) at the main driver's door all window functions are gone except for drivers' window.

2) I cannot also control the tailgate window at the switch found on the "dashboard".

3) Also, the main drivers side control for locking all doors does not respond.

What I did:

I went through each fuse in the car. The interior fuse box, and engine compartment fuse boxes to look for visual signs of being blown. Nothing.

I took off the main controller found in the driver's side door. Took it apart looking to clean any contacts. I did. Nothing.

I thought I could find a relay for all of these, but nothing was found. Nothing.

Could I have messed everything up? Meaning all the codes by getting the new key fob working?

Anything you could provide would be helpful?

Al

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

This is an odd one. I went through wiring schematics, and the liftgate window and driver's door window are powered by different supplies.

We need to work through this. In the fuse box (in-vehicle) locate fuses 1 and 5. Fuse 1 is for the liftgate and fuse 5 is to the driver's door. In addition to checking the fuse, confirm there is power to and from it. Here is a link that you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Both fuses should have power at all times.

If they are good, go back to the module in the driver's door and locate a blue wire with a white tracer. That is the power supply to the module. Confirm it has power. If it does, with the key on, see if there is power out from the module via the following wires:

1) Red wire when the switch is in up position.

2) Green wire when the switch is in the down position.

I attached two pics of the wiring schematic below. Also, the last pic shows the fuses involved. I seriously question if it is a power issue, but this is the best place to start.

By chance, is this an aftermarket keyless entry system or original equipment? What relearn procedure did you use?

Let me know.

Joe

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Friday, February 4th, 2022 AT 8:07 PM

ALCORSINO

MEMBER
4 POSTS

Thanks joe, I did what you suggested and appreciate it.

I have been going out of my mind trying to find the problem. In my further investigation, I found that all the fuses were okay, but out of all of them I found that the "tail" and "panel connections" to both had no power. (Pic attached)

I also found through the electrical circuit diagram a "taillight relay" is the source of power. For days I looked for that relay and had no success. So, I took out each 4-prong relay and tested it with my ohmmeter and also with 12 volts going through it. All were good.

Keep in mind, not one of them said it was the "taillight relay". I have taken the interior under the steering wheel panel and taken the kick plate panel off to the left of your foot, nothing. I use the "Alldata" program to find it, nothing! I searched Goggle, nothing.

I went to, I believe, advance auto to buy "taillight relay" to make sure what I'm looking for. It's a simple 4 prong relay.

This may solve the problem but for the life of me I can't find it. Remember, it case they had called it something else I tested each relay under the hood that I could find and had no success.

Am I nuts? By the way, with the key on or off I have no power on both the "tail" and "panel" fuse section.

I included other pic's.

Help!

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Saturday, February 26th, 2022 AT 2:11 PM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

As far as the relay, I was able to find it identified on the rear of the interior fuse box. See pics below. Picture the fuse box flipped.

Let me know if this helps you locate it.

Joe

See pics below.

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Saturday, February 26th, 2022 AT 7:55 PM

ALCORSINO

MEMBER
4 POSTS

Hi Joe, I found that relay, and it was in sound condition. So, then I checked all the other relays behind and around, and I still have no power on either fuse.

Any idea where to go next?

Get a new ECU?

Thanks,

Al

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Wednesday, March 9th, 2022 AT 4:14 AM

ALCORSINO