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

* *: w/ Automatic Light Control System

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)

(a) Using the Techstream, read the Data List Exterior Lighting System.

Main Body





*: w/ Automatic Light Control System

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:





*: w/ Automatic Light Control System

Text in Illustration





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 F22 headlight dimmer switch connector.

(b) Disconnect the F9 main body ECU connector.

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

Standard Resistance:





*: w/ Automatic Light Control System

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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