Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT NIGHTTIME ILLUMINATION

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

Result:

RESULT CHART

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

B: GO TO COMBINATION METER

A: Go to next step

CHECK DRIVER SIDE JUNCTION BLOCK (PANEL2 VOLTAGE)

Removed the 2E junction block connector.

Fig 1: Identifying 2E Junction Block Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

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

NG: REPLACE DRIVER SIDE JUNCTION BLOCK

OK: Go to next step

CHECK WIRE HARNESS (RADIO RECEIVER - DRIVER SIDE JUNCTION BLOCK AND BODY GROUND)

Disconnect the R3 receiver connector.

Fig 2: Identifying R3 Receiver Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage and resistance of the wire harness side connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

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