AUDIO AND VISUAL SYSTEM Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch to the radio receiver.

If there is an open in the circuit, the audio system cannot be operated using the steering pad switch.

If there is a short in the circuit, the same condition as when a switch is continuously depressed occurs.

Therefore, the radio receiver cannot be operated using the steering pad switch, and also the radio receiver itself cannot function.

WIRING DIAGRAM

A011875E01

INSPECTION PROCEDURE

Note

The vehicle is equipped with SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System Click here.

PROCEDURE


  1. INSPECT RADIO RECEIVER ASSEMBLY


    1. A01191BE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the D63 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      D63-7 (SW1) - D63-6 (SWG) No switch is pushed 95 to 105 kΩ
      Seek+ switch: pushed Below 2.5 Ω
      Seek- switch: pushed 312.5 to 345.5 Ω
      Volume+ switch: pushed 950 to 1050 Ω
      Volume- switch: pushed 2954.5 to 3265.5 Ω
      D63-8 (SW2) - D63-6 (SWG) No switch is pushed 95 to 105 kΩ
      MODE/PWR switch: pushed Below 2.5 Ω

    3. Reconnect the radio receiver assembly connector.


    NG

    INSPECT STEERING PAD SWITCH LH Click here

    OK

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

  2. INSPECT STEERING PAD SWITCH LH


    1. Disconnect the V1 steering pad switch LH connector.

      A0118CWE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Pad Switch LH)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      V1-10 (AU1) - V1-8 (EAU) No switch is pushed 95 to 105 kΩ
      Seek+ switch: pushed Below 2.5 Ω
      Seek- switch: pushed 312.5 to 345.5 Ω
      Volume+ switch: pushed 950 to 1050 Ω
      Volume- switch: pushed 2954.5 to 3265.5 Ω
      V1-9 (AU2) - V1-8 (EAU) No switch is pushed 95 to 105 kΩ
      MODE/PWR switch: pushed Below 2.5 Ω

    3. Reconnect the steering pad switch LH connector.


    NG

    REPLACE STEERING PAD SWITCH LH Click here

    OK

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A011864E04
      Text in Illustration
      *1

      Component without harness connected

      (Spiral Cable Sub-Assembly)

      Disconnect the V1 steering pad switch LH connector.

    2. Disconnect the D19 spiral cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V1-8 (EAU) - D19-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      V1-10 (AU1) - D19-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      V1-9 (AU2) - D19-5 (AU2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

      Note

      The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the precaution for the SRS Click here.

    4. Reconnect the steering pad switch LH connector.

    5. Reconnect the spiral cable sub-assembly connector.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR