Hazard Warning Switch Circuit

LIGHTING: LIGHTING SYSTEM: Hazard Warning Switch Circuit
- Hazard Warning Switch Circuit

DESCRIPTION

The hazard warning switch sends a signal to the driver side junction block ECU.

WIRING DIAGRAM





INSEPCTION PROCEDURE

PROCEDURE

1. INSPECT A/C CONTROL ASSEMBLY (HAZARD WARNING SWITCH)





(a) Remove the A/C control.

(b) Measure the resistance of the A/C control.

Standard resistance:





NG -- REPLACE A/C CONTROL ASSEMBLY
OK -- Continue to next step.

2. CHECK WIRE HARNESS (A/C CONTROL - ECU AND BODY GROUND)





(a) Disconnect the A9 and A10 A/C control connectors.

(b) Disconnect the D4 ECU connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

3. CHECK WIRE HARNESS (ECU - BATTERY)





(a) Disconnect the 2D junction block connector.

(b) Measure the voltage of the wire harness side connectors.

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

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