HEADUP DISPLAY SYSTEM Main Switch Circuit

DESCRIPTION

The combination meter mirror ECU is connected to the combination switch assembly (headup display switch) via a direct line. As a result, the combination meter mirror ECU can be turned on and off by operation of the combination switch assembly (headup display switch).

WIRING DIAGRAM

A000P63E04

PROCEDURE


  1. READ VALUE USING GTS (MAIN SW)


    1. Using the GTS, read the Data List.

      Headup Display
      Tester Display Test Part Control Range Diagnostic Note
      Main Switch Headup display main switch / ON or OFF

      ON: Switch pressed

      OFF: Switch released

      		 -
      Brightness Up Switch Brightness up switch / ON or OFF

      ON: Switch pressed

      OFF: Switch released

      		 -
      Brightness Down Switch Brightness down switch / ON or OFF

      ON: Switch pressed

      OFF: Switch released

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

      ON: Switch pressed

      OFF: Switch released

      		 -
      Projection Position Down Switch Projection position up switch / ON or OFF

      ON: Switch pressed

      OFF: Switch released

      		 -
      Display Change Switch Display change switch / ON or OFF

      ON: Switch pressed

      OFF: Switch released

      		 -
      OK
      Headup display switch assembly condition displayed on the GTS changes with the actual switch operation.

    NG

    REPLACE COMBINATION METER MIRROR ECU Click here

    OK

  2. INSPECT HEADUP DISPLAY SWITCH ASSEMBLY


    1. Remove the headup display switch assembly Click here.

    2. Inspect the headup display switch assembly Click here.


    NG

    REPLACE HEADUP DISPLAY SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (METER MIRROR ECU - HEADUP DISPLAYSWITCH ASSEMBLY)


    1. Disconnect the P1 combination meter mirror ECU connector.

    2. Disconnect the N7 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
      P1-9 (SW1) - N7-12 (ILU) Always Below 1 Ω
      P1-10 (SW2) - N7-10 (ILD)
      P1-16 (E) - N7-6 (CH)
      P1-9 (SW1) or N7-12 (ILU) - Body ground Always 10 kΩ or higher
      P1-10 (SW2) or N7-10 (ILD) - Body ground
      P1-16 (E) or N7-6 (CH) - Body ground

    OK

    REPLACE COMBINATION METER MIRROR ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR