LIGHTING SYSTEM Headlight Leveling ECU Power Source Circuit

DESCRIPTION

This circuit is uses to detect the on (IG) state of the power source circuit. The headlight leveling ECU assembly receives a signal from the LH-IG1 relay.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (H-LP LVL)

   
   

   1. Remove the H-LP LVL fuse from the cowl side junction block LH.

   2. Measure the resistance of the fuse.

      Standard resistance
      Below 1 Ω

   
   

   NG

   REPLACE FUSE

   OK

2. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - BATTERY AND BODY GROUND)

   
   

   1. Disconnect the A64 headlight leveling ECU assembly connector.

   2. Measure the voltage and resistance of the wire harness side connector.

      Standard voltage
      Tester Connection Condition Specified Condition A64-14 (IG) - A64-1 (E1) Engine switch on (IG) 11 to 14 V

      Standard resistance
      Tester Connection Condition Specified Condition A64-1 (E1) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here