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. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU, RUNNING LIGHT RELAY)

(a) Disconnect the 4J and 4S main body ECU connectors.

(b) Disconnect the D9 running light relay assembly connector.*1

HINT
*1: w/ Daytime running light system

(c) Measure the resistance.

Standard resistance:

HINT
*1: w/ Daytime running light system

(d) Reconnect the main body ECU connectors.

(e) Reconnect the running light relay assembly connector*.

HINT
*: w/ Daytime running light system

NG -- INSPECT HEADLIGHT DIMMER SWITCH

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. INSPECT HEADLIGHT DIMMER SWITCH

(a) Inspect the light control switch.

(1) Measure the resistance.

Standard resistance:

(b) Inspect the headlight dimmer switch.

(1) Measure the resistance.

Standard resistance:

(d) Inspect the front fog light switch.

(1) Measure the resistance.

Standard resistance:

NG -- REPLACE HEADLIGHT DIMMER SWITCH

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR