Door Courtesy Light and Courtesy Switch Circuit

CIRCUIT DESCRIPTION

The door courtesy light goes on when the door is opened and goes off when closed.

The driver door ECU detects the condition of the door courtesy switch and sends a signal to each ECU via the multiplex communication circuit.

Wiring Diagram:

Steps 1 - 4:

Step 5:

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.