Headlight Leveling ECU Power Source Circuit

LIGHTING: LIGHTING SYSTEM: Headlight Leveling ECU Power Source Circuit

Headlight Leveling ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the headlight beam level control ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT IGNITION RELAY NO. 1





(a) Inspect IG1 relay continuity.
(1) Remove the IG1 relay from the instrument panel J/B.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE IGNITION RELAY NO. 1
OK -- Continue to next step.

2. INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU





(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT BEAM LEVEL CONTROL ECU)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT BEAM LEVEL CONTROL ECU)





(a) Disconnect connector A21 of the headlight beam level control ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






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

4. CHECK HARNESS AND CONNECTOR (HEADLIGHT BEAM LEVEL CONTROL ECU - BODY GROUND)





(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:






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