Illumination Circuit: Procedure

1. Turn on the light switch and check the nighttime illuminations of the vehicle interior.
   RESULT
   
   

   Result	Proceed to
   Only radio receiver nighttime illumination does not activate	A
   No nighttime illumination at all	B

B → GO TO COMBINATION METER SYSTEM 

A: Go to next step 

1. Removed the 2E junction block connector.
   Fig 1: Identifying Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Specified Condition
   PANEL2 (2E-5) - Body ground	10 to 14 V

NG → REPLACE DRIVER SIDE JUNCTION BLOCK 

OK: Go to next step 

1. Disconnect the R3 receiver connector.
   Fig 2: Identifying Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage

   Standard resistance 

   Tester Connection	Condition	Specified Condition
   ILL+ (R3-2) - Body ground	Light control switch OFF	Below 1 V
   ILL+ (R3-2) - Body ground	Light control switch TAIL or HEAD	10 to 14 V

   Tester Connection	Specified Condition
   ILL- (R3-12) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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