9 - Mirror Heater Does Not Operate

Mirror Heater Does Not Operate (Interlocked With Rear Defogger and Wipers)

CIRCUIT DESCRIPTION
While a switch signal at the rear defogger is transmitted multiply to the door ECU from the air conditioning ECU, the door ECU operates the mirror heater when the front deicer operates.

NOTE: Power mirror control system has a function with a large-scale body multiplex communication. First of all, inspect the communication function according to "How To Proceed With Troubleshooting", and check that no malfunction exists in the communication system. then proceed with the troubleshooting.

Wiring Diagram:

Step 1:

Step 2 - 4:

Step 5:

INSPECTION PROCEDURE