Light Control Switch Circuit

LIGHTING (EXT): 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) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List /

(e) According to the display on the Techstream, read 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 Exterior Lighting System

2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

(a) Remove the headlight dimmer switch assembly Removal.





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

Standard Resistance:





(c) Reinstall the headlight dimmer switch assembly.

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

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

(a) Disconnect the H11 headlight dimmer switch assembly connector.





(b) Disconnect the H3, H4 and DD main body ECU connectors.

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

Standard Resistance:





(d) Reconnect the main body ECU connectors.

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

Standard Resistance:





(f) Reconnect the headlight dimmer switch assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU