AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM Headlight Beam Level Warning Circuit

DESCRIPTION

for TMC, TMMR Made:

The headlight leveling ECU assembly sends a warning display signal to the combination meter assembly if it detects a malfunction in the headlight beam level control system. When the combination meter assembly receives the warning display signal, it alerts the driver by displaying "Check Headlight System" on the multi-information display.

for TMMK Made:

The headlight leveling ECU assembly sends a warning display signal to the combination meter assembly if it detects a malfunction in the headlight beam level control system. When the combination meter assembly receives the warning display signal, it alerts the driver by displaying "Check Headlight Leveling System" on the multi-information display.

WIRING DIAGRAM

B000JT7E04

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HEADLIGHT LEVELING ECU ASSEMBLY (INPUT SIGNAL)


    1. B000LPPE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)

      Disconnect the A34 headlight leveling ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A34-6 (WNG) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - HEADLIGHT LEVELING ECU ASSEMBLY) Click here

    OK

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

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


    1. Disconnect the I17 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A34-6 (WNG) - I17-11 (LVWG) Always Below 1 Ω
      A34-6 (WNG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    GO TO METER / GAUGE SYSTEM Click here