Light Control Switch Circuit

LIGHTING: LIGHTING SYSTEM: Light Control Switch Circuit
- Light Control Switch Circuit

DESCRIPTION

This circuit detects the state of the headlight dimmer switch.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the tester on.

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

(e) According to the display on tester, read the "Data List".

Body (Main Body ECU):





OK:

Condition information can be displayed.

NG -- INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

(a) Remove the headlight dimmer switch assembly.





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

(1) Light Control Switch:

Standard resistance:





(2) Headlight Dimmer Switch Switch:

Standard resistance:





(c) Reinstall the headlight dimmer switch assembly.

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

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

(a) Disconnect the E8 main body ECU connector.





(b) Disconnect the E20 headlight dimmer switch assembly connector.

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

Standard resistance:





HINT
*: w/ Daytime running light system

(d) Reconnect the main body ECU connector.

(e) Reconnect the headlight dimmer switch assembly connector.

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

4. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - HEADLIGHT*)

HINT
*: w/o Daytime running light system

(a) Disconnect the E20 headlight dimmer switch assembly connector.





(b) Disconnect the A23 and A24 headlight connectors.

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

Standard resistance:





(d) Reconnect the headlight dimmer switch assembly connector.

(e) Reconnect the headlight connectors.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures