LIGHTING SYSTEM Diagnosis Circuit

DTC Code DTC Name
Diagnosis Circuit

DESCRIPTION

The headlight leveling ECU outputs DTC information to the intelligent tester via this circuit.

WIRING DIAGRAM

E186286E01

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (DLC3 - HEADLIGHT LEVELING ECU ASSEMBLY)

    U123648E02

    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

      A49-15 (INIT) - H16-7 (SIL)

      Always

      Below 1 Ω

      A49-15 (INIT) - Body ground

      Always

      10 kΩ or higher
      Table 1. Text in Illustration

      *1

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)

      *2

      DLC3

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR