Lighting System Headlight Signal Circuit
Lighting. Lexus Gs430, Gs300. Uzs190 Grs190
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU - BODY GROUND)
CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU - SWITCH - BODY GROUND)
LIGHTING SYSTEM - Headlight Signal Circuit |
DESCRIPTION
The cowl side junction block ECU RH receives the HEAD position signal from the light control switch.It also receives the signal from the combination switch via the multiplex communication system.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU - BODY GROUND) |
Measure the voltage of the wire harness side connector.
- Standard voltage:
Tester Connection
| Specified Condition
|
L67-23 (HEAD) - Body ground
| 10 to 14 V
|
| NG |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
| 2.CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU - SWITCH - BODY GROUND) |
Disconnect the L67 ECU connector.
Disconnect the L22 switch connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
L67-23 (HEAD) - L22-4 (HEAD)
| Below 1 Ω
|
L67-23 (HEAD) or L22-4 (HEAD) - Body ground
| 10 kΩ or higher
|
L22-5 (E) - Body ground
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
| OK |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
