Door Mirror Foot Light Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Body No. 3 / Active Test.
5. Check the operation.
   BODY NO. 3 (MAIN BODY ECU LH)
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Exterior Foot Light Operation	Door mirror foot lights	ON / OFF	-

   OK

   Door mirror foot lights come on.

   HINT: 

   The door mirror foot lights RH and LH share the same power source. If either of the lights does not come on, there may be a problem in the part of the circuit that relates to that light. Therefore, inspect that part of the circuit.

NG → See step   2 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Disconnect the Q1 main body ECU LH connector.
   Fig 1: Identifying Q1 Main Body ECU LH Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   Q1-4 (LCTY) - Body ground	Always	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)