Light Control Switch Circuit

LIGHTING: LIGHTING SYSTEM: Light Control Switch Circuit

Light Control Switch Circuit

DESCRIPTION

This circuit detects the state of the light control switch and sends it to the Multiplex Network Body ECU.

WIRING DIAGRAM









INSPECTION PROCEDURE
HINT: Start the inspection from step 1 in the case of using the intelligent tester, and start from step 2 in the case of not using the intelligent tester.

PROCEDURE

1. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)
(a) Using the Techstream, read the Data List.

Body





OK:
Condition sign can be displayed.
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.
2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY (HEAD, TAIL, A)





(a) Inspect the headlight dimmer switch continuity.
(1) Check continuity between terminals at each switch position as shown in the chart.
Standard resistance:






NG -- REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY
OK -- Continue to next step.
3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (HEAD, TAIL, A, HF)
(a) Measure the voltage between terminal HEAD, TAIL, A and HF of the instrument panel J/B assembly (driver side J/B assembly) and body ground.





Standard voltage:






NG -- CHECK AND REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK -- Continue to next step.
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (HEAD, TAIL, A, HF)
(a) Disconnect the connector from the instrument panel J/B assembly (driver side J/B assembly).
(b) Check continuity between terminal HEAD, TAIL, A and HF of the instrument panel J/B assembly (driver side J/B assembly) on the wire harness side and body ground.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE