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