Headlight Dimmer Switch Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Headlight Dimmer Switch Circuit
- Headlight Dimmer Switch Circuit

DESCRIPTION

The main body ECU receives the following signals:

* Headlight dimmer switch tail, head, AUTO, high or high flash signal

* Front fog light switch signal

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)

(a) Using the Techstream, read the Data List Data List / Active Test.

Main Body





OK:

The display is as specified in the normal condition column.

NG -- INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

(a) Remove the headlight dimmer switch Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the G31 headlight dimmer switch connector.

(b) Disconnect the G47 main body ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal