Multi-display Power Source Circuit: Wiring Diagram
WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
The wiring diagram is shown below.
- INSPECT FUSE (TV, ACC, ECU-IG RH)
- Remove the TV fuse from the cowl side junction block LH.
- Remove the ACC and ECU-IG RH fuses from the cowl side junction block RH.
- Measure the resistance of the fuses.
Standard resistance: Below 1 Ω
NG : REPLACE FUSE
OK : GO TO NEXT STEP
- CHECK WIRE HARNESS (MULTI-DISPLAY - BATTERY AND BODY GROUND)
- Disconnect the K46 and K47 multi-display connectors.
- Measure the voltage of the wire harness side connector.
Standard voltage
TESTER CONNECTION AND SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition K46-1 (+B1) - Body ground Always 10 to 14 V K46-2 (ACC) - Body ground Engine switch on (ACC) 10 to 14 V K46-3 (IG) - Body ground Engine switch on (IG) 10 to 14 V - Measure the resistance of the wire harness side connectors.
Standard resistance
TESTER CONNECTION AND SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition K47-12 (SGND) - Body ground Always Below 1 Ω K46-10 (GND1) - Body ground Always Below 1 Ω K47-12 (SNSE) - Body ground Always Below 1 Ω
NG : REPAIR OR REPLACE HARNESS AND CONNECTOR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE