ASC SYSTEM Main Switch Circuit

DESCRIPTION

The stereo component equalizer assembly receives signals from the vehicle sound switch. The ASC system can be turned on and off by operating the vehicle sound switch.

WIRING DIAGRAM

B003UBOE01

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

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 / ASC / Data List.

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


      Body Electrical > ASC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Volume SW Vehicle sound switch on/off status OFF or ON

      OFF: Vehicle sound switch off

      ON: Vehicle sound switch on

      		 -

      Body Electrical > ASC > Data List
      Tester Display
      Volume SW
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT VEHICLE SOUND SWITCH


    1. Remove the vehicle sound switch.

      Click here

    2. Inspect the vehicle sound switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VEHICLE SOUND SWITCH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (VEHICLE SOUND SWITCH - STEREO COMPONENT EQUALIZER ASSEMBLY AND BODY GROUND)


    1. Disconnect the K160 stereo component equalizer assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K161-3 (NVI) - K160-5 (VLSW) Always Below 1 Ω
      K161-3 (NVI) or K160-5 (VLSW) - Body ground Always 10 kΩ or higher
      K161-4 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY for LHD: Click here
    REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR