Inspection Procedure

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

   Result: 

   RESULT CHART
   
   

   Result	Proceed to
   Only multi-display dimmer does not illuminate	A
   No nighttime illumination at all	B

B: GO TO  COMBINATION METER 

A: Go to next step 

1. Disconnect the M5 panel connector.
   Fig 1: Identifying M5 Panel Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 2F junction block connector.
3. Measure the resistance of the wire harness connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   M5-1 (TAIL) - 2F-10	Below 1 Ω
   MS-11 (GND1) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Remove the instrument cluster finish panel center.
   Fig 2: Identifying Instrument Cluster Finish Panel Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the panel.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   M5-1 (TAIL) - A-1 (ILL+)	Below 1 Ω
   M5-11 (GND1) - A-3 (GND)	Below 1 Ω

NG: REPAIR OR REPLACE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY CENTER 

OK: Go to next step 

Fig 3: Identifying Driver Side Junction Block ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the ignition switch to ACC.
2. Measure the voltage of the junction block connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   2F-10 - Body ground	Light control switch OFF	Below 1 V
   2F-10 - Body ground	Light control switch TAIL or HEAD	10 to 14 V

NG: REPLACE DRIVER SIDE JUNCTION BLOCK (DRIVER SIDE JUNCTION BLOCK ECU) 

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