Headlight Signal Circuit

LIGHTING: LIGHTING SYSTEM: Headlight Signal Circuit
- 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

PROCEDURE

1. CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU - BODY GROUND)

(a) Measure the voltage of the wire harness side connector.





Standard voltage:





OK -- CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU - SWITCH - BODY GROUND)

NG -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. CHECK WIRE HARNESS (MULTIPLEX NETWORK BODY ECU - SWITCH - BODY GROUND)

(a) Disconnect the K67 ECU connector.





(b) Disconnect the K22 switch connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

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