Light Control Switch Circuit

LIGHTING: LIGHTING SYSTEM: Light Control Switch Circuit

Light Control Switch Circuit

DESCRIPTION

The main body ECU receives light control switch, dimmer switch and front fog light switch information signals from the headlight dimmer switch.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)
(a) Operate the Techstream according to the display and select the "Data List".

Main Body





OK:
When combination light switch operation is performed, the result will be the same as above.
NG -- INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
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
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU AND BODY GROUND)




(a) Disconnect the J10 switch connector.
(b) Disconnect the J3, J4 and DD ECU connectors.
(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