LIGHTING SYSTEM Indicator Circuit

DESCRIPTION

The headlight beam level control system indicator light in the combination meter assembly comes on for approximately 3 seconds when the power switch is turned on (IG). The indicator light also comes on when the headlight leveling ECU assembly detects a malfunction.

WIRING DIAGRAM

B001M1FE18
*a Combination Meter Assembly
*b from IG2 Relay
*c Headlight Leveling ECU Assembly

PROCEDURE


  1. CHECK HEADLIGHT LEVELING ECU ASSEMBLY (INPUT SIGNAL)


    1. B001LR2E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Headlight leveling ECU assembly)

      Disconnect the A46 headlight leveling ECU assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A46-6 (WNG) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - HEADLIGHT LEVELING ECU ASSEMBLY)


    1. Disconnect the H19 combination meter assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A46-6 (WNG) - H19-3 (LVWG) Always Below 1 Ω
      A46-6 (WNG) - Body ground Always 10 kΩ or higher

    OK

    GO TO METER / GAUGE SYSTEM Click here

    NG

    REPAIR OR REPLACE COMBINATION METER ASSEMBLY