LIGHTING SYSTEM Hazard Warning Switch Circuit

DESCRIPTION

When the combination meter assembly receives a hazard warning switch signal, the flasher IC turns on and hazard control is performed.

WIRING DIAGRAM

B003MP1E02

CAUTION / NOTICE / HINT

Note

When replacing the combination meter assembly, make sure to replace it with a new one.

PROCEDURE


  1. READ VALUE USING GTS (HAZARD FLASHER SWITCH)


    1. Using the GTS, read the Data List.

      Click here


      Body Electrical > Combination Meter > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Hazard Flasher Switch Hazard warning switch signal ON or OFF

      ON: Hazard warning switch on

      OFF: Hazard warning switch off

      		 -

      Body Electrical > Combination Meter > Data List
      Tester Display
      Hazard Flasher Switch
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT CLOCK ASSEMBLY (HAZARD WARNING SWITCH)


    1. Remove the clock assembly (hazard warning switch).

      Click here

    2. Inspect the clock assembly (hazard warning switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CLOCK ASSEMBLY (HAZARD WARNING SWITCH) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (CLOCK ASSEMBLY [HAZARD WARNING SWITCH] - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the H3 clock assembly (hazard warning switch) connector.

    2. Disconnect the G10 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H3-3 (TB) - G10-2 (HAZ) Always Below 1 Ω
      H3-1 (E) - Body ground Always Below 1 Ω
      H3-3 (TB) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR