LIGHTING SYSTEM Warning Light Circuit

DESCRIPTION

The headlight beam level control system warning light in the combination meter comes on for approximately 3 seconds when the ignition switch is turned to ON. The warning light also comes on when the headlight leveling ECU detects a malfunction.

WIRING DIAGRAM

A01J6GHE01

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. INSPECT COMBINATION METER ASSEMBLY


    1. Remove the combination meter assembly Click here.

      A01J7C8E02

    2. Connect the positive (+) lead from the battery to terminal A-21 and the negative (-) lead to terminal B-22.

    3. Check that the warning light comes on.

      OK
      Warning light comes on.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY)

    A01J59HE07
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Combination Meter Assembly)

    1. Disconnect the C27 combination meter connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C27-21 - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the C28 combination meter connector.

    2. Disconnect the H17 headlight leveling ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H17-6 (WNG) - C28-22 Always Below 1 Ω
      H17-6 (WNG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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