LIGHTING SYSTEM Generator Signal Circuit

DESCRIPTION

The headlight leveling ECU assembly uses the ALTL signal as the engine running signal to judge whether to operate the automatic headlight beam level control system.

WIRING DIAGRAM

A01616ME05

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) (INPUT VOLTAGE)


    1. A01635AE03
      Text in Illustration
      *1

      Component with harness connected

      (Main Body ECU LH (Cowl Side Junction Block LH))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A30-13 (ALTL) - Body ground Engine running 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - MAIN BODY ECU LH) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - MAIN BODY ECU LH)


    1. Disconnect the A64 headlight leveling ECU assembly connector.

    2. Disconnect the A30 main body ECU LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A64-8 (CHG-) - A30-13 (ALTL) Always Below 1 Ω
      A64-8 (CHG-) - 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