HEADUP DISPLAY SYSTEM Headup Display Switch Circuit

DESCRIPTION

In this circuit, the combination meter mirror ECU detects headup display switch assembly signals via a direct line.

WIRING DIAGRAM

B002ESYE01

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Head Up Display / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Head Up Display
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Main Switch Headup display main switch OFF or ON

      OFF: Switch released

      ON: Switch pushed

      		 -
      Brightness Up Switch Brightness up switch OFF or ON

      OFF: Switch released

      ON: Switch pushed

      		 -
      Brightness Down Switch Brightness down switch OFF or ON

      OFF: Switch released

      ON: Switch pushed

      		 -
      Projection Position Up Switch Projection position up switch OFF or ON

      OFF: Switch released

      ON: Switch pushed

      		 -
      Projection Position Down Switch Projection position down switch OFF or ON

      OFF: Switch released

      ON: Switch pushed

      		 -
      Display Change Switch Display change switch OFF or ON

      OFF: Switch released

      ON: Switch pushed

      		 -

      Body Electrical > Head Up Display > Data List
      Tester Display
      Main Switch
      Brightness Up Switch
      Brightness Down Switch
      Projection Position Up Switch
      Projection Position Down Switch
      Display Change Switch
      OK
      Headup display switch assembly condition displayed on the GTS changes with the actual switch operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER MIRROR ECU Click here

    NG

  2. INSPECT HEAD UP DISPLAY SWITCH ASSEMBLY


    1. Remove the headup display switch assembly.

      Click here

    2. Inspect the headup display switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADUP DISPLAY SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER MIRROR ECU - HEADUP DISPLAY SWITCH ASSEMBLY)


    1. Disconnect the M1 combination meter mirror ECU connector.

    2. Disconnect the K6 headup display switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M1-9 (SW1) - K6-12 (ILU) Always Below 1 Ω
      M1-10 (SW2) - K6-10 (ILD) Always Below 1 Ω
      M1-16 (E) - K6-6 (CH) Always Below 1 Ω
      M1-9 (SW1) or K6-12 (ILU) - Body ground Always 10 kΩ or higher
      M1-10 (SW2) or K6-10 (ILD) - Body ground Always 10 kΩ or higher
      M1-16 (E) or K6-6 (CH) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER MIRROR ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR