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

A01QB4JE01
for LHD
*a from LH-IG1 RLY1 Relay
*b Vehicle Sound Switch (Integration Control and Panel Assembly)
*c Stereo Component Equalizer Assembly
A01QB4JE02
for RHD
*a from RH-IG1 RLY1 Relay
*b Vehicle Sound Switch (Integration Control and Panel Assembly)
*c Stereo Component Equalizer Assembly

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
      ASC Switch 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
      ASC Switch
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    NG

  2. INSPECT VEHICLE SOUND SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY)


    1. Check the vehicle sound switch on/off operation.


      1. Remove the vehicle sound switch (integration control and panel assembly).

        Click here

      2. Inspect the vehicle sound switch (integration control and panel assembly).

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VEHICLE SOUND SWITCH (INTEGRAETION CONTROL AND PANEL ASSEMBLY)

    OK

  3. CHECK HARNESS AND CONNECTOR (VEHICLE SOUND SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY) - STEREO COMPONENT EQUALIZER ASSEMBLY)


    1. Disconnect the K80 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
      K5-2 (ECU) - K80-5 (SW) Always Below 1 Ω
      K5-13 (IND) - K80-7 (IND) Always Below 1 Ω
      K5-2 (ECU) - Body ground Always 10 kΩ or higher
      K5-13 (IND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR