LIGHTING SYSTEM Warning Light Circuit

DTC Code DTC Name
Warning Light Circuit

DESCRIPTION

The headlight beam level control system warning light in the combination meter assembly 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

E186284E01

PROCEDURE

  1. INSPECT COMBINATION METER ASSEMBLY

    E142627E11

    1. Remove the combination meter assembly (Click here).

    2. Connect the positive (+) lead from the battery to terminal 39 (IG+) and the negative (-) lead to terminal 12 (LVWG).

    3. Check that the warning light comes on.

      OK

      Warning light comes on.

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

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

    U123664E02

    1. Disconnect the H62 combination meter connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H62-39 (IG+) - Body ground

      Ignition switch ON

      11 to 14 V

      Ignition switch off

      Below 1 V
      Table 1. Text in Illustration

      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    U123663E03

    1. Disconnect the A49 ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A49-6 (WNG) - H62-12 (LVWG)

      Always

      Below 1 Ω

      A49-6 (WNG) - Body ground

      Always

      10 kΩ or higher
      Table 2. Text in Illustration

      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)

      *2

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR