Mirror Defogger Circuit

CIRCUIT DESCRIPTION

The Driver Door ECU receives signals from the defogger switch, the wiper switch and the rain sensor to operate the mirror heater.




When the battery voltage is supplied to the terminal as follows, the mirror heater functions accordingly.

Wiring Diagram:

Steps 1 - 3:

INSPECTION PROCEDURE

HINT: In case of using the LEXUS hand-held tester, start the inspection from step 1 and in case of not using the LEXUS hand-held tester, start from step 2.