Neither of the power mirrors work in the car. I downloaded the repair manual from TIS (definitely worth the $10, thanks LexLS!) and went through the troubleshooting procedures for the mirror system. It would appear that the power mirror ECU is defective. I checked connectivity for the switch assembly (all switch functions check out) and power to the ECU. When triggering various functions using the switch, no output voltage is recorded from the ECU. If that's the case, it can't be an issue with the power mirror motors or anything else, right? Just wanting to be sure before I track down a replacement ECU. There was one connection I didn't check that related to the telescopic column ECU...didn't feel like tearing into the car further at this point. Could that connection, which seems to relate to memorizing the mirror locations, have any effect on basic mirror functionality?

 

I can't answer your question about the telescopic ECM, but my guess would be that it's not the culprit if the telescopic wheel works as it should. If you end up needing the power mirror ECM, try www.car-part.com to find a good salvage unit.

 

Ordered a used ECU for $40 from a place in Colorado. Here's hoping it works :-)

 

Received the used PM ECU and the mirrors work again.

 

Where is the PM computer located?

 

x2

because my power mirrors are not working either. I would love to be able to set them to my memory seats.

 

Behind the glove box. The Toyota diagnostic information was invaluable for troubleshooting the issue. Well worth the $10/day for the pdf downloads.

 

What/who is TIS? I don't see a link on lexls.com for repair manuals.

(yes, I know this is an old thread but if I make a new one someone tells me to search so I did)

 

toyota information services.

 

My mirrors aren't working either. A dealer said I needed a new mirror switch but they were no longer available. I see some on Ebay. I wonder if that part is all I need and more importantly, easily changed?


*Edit - It's not the mirror switch. Now I'm told it's the mirror ECU.

 

What does ECU stand for and is this the same thing?

http://www.ebay.com/itm/1990-1994-Le...sories&vxp=mtr

 

ECU stands for (electronic control unit)