Need to know A/C On/Off switch pinouts on AC Amplifier?

TORCHKC

MEMBER
1999 LEXUS LX 450
150,000 MILES

Trying to repair this, as the only issue is that the A/C On/Off switch doesn't work when plugged in. I just need to know which pins control this functionality so I can attempt to trace back the malfunctioning component.

Part number of the unit in question: 88650-60212

I wouldn't normally bother, but this unit is quite valuable.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

It might be the controller itself, but I would run a CAN scan to see what's going on. You can get a CAN scanner (Controller Area Network) from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is a list of CAN scanners starting at about $25.00 on Amazon:

https://amzn.to/3DBMlc7

Here are the A/C wiring diagrams and the pin outs in the images below, please let me know what you find.

Images (Click to make bigger)

Need to know A/C On/Off switch pinouts on AC Amplifier?

1 Reply

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