Interior Light Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn Techstream on.
4. Select the following menu items: Body Electrical / Main Body / Active Test.
5. Check the operation.
   MAIN BODY:
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Illuminated Entry System	Personal light, interior lights and ignition key cylinder light (Light switch is in DOOR position and all doors are closed).	ON/OFF	-

   OK

   Each light fades in.

NG → See step   2 

OK → See step   4 

1. Remove the DOME fuse from the engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Display	Condition	Specified Condition
   DOME fuse	Always	Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the 1I and 1R instrument panel junction block connectors.
   Fig 1: Checking Harness And Connector (Battery - Instrument Panel Junction Block)

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

   Standard voltage

   Tester Connection	Condition	Specified Condition
   1I-10 (ILE) - Body ground	Always	11 to 14 V
   1R-5 (ILE) - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)