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 that when the switch is continuously pressed occurs.

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

WIRING DIAGRAM

A0160WCE10

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. INSPECT RADIO RECEIVER


    1. A0160URE04

      Disconnect the radio receiver connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J63-7 (SW1) - J63-6 (SWG) No switch is pushed 95 to 105 kΩ
      J63-7 (SW1) - J63-6 (SWG) Seek+ switch: pushed Below 2.5 Ω
      J63-7 (SW1) - J63-6 (SWG) Seek- switch: pushed 313.5 to 346.5 Ω
      J63-7 (SW1) - J63-6 (SWG) Volume+ switch: pushed 959.5 to 1060.5 Ω
      J63-7 (SW1) - J63-6 (SWG) Volume- switch: pushed 3049.5 to 3370.5 Ω
      J63-8 (SW2) - J63-6 (SWG) No switch is pushed 95 to 105 kΩ
      J63-8 (SW2) - J63-6 (SWG) MODE switch: pushed Below 2.5 Ω

    NG

    INSPECT STEERING PAD SWITCH ASSEMBLY Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the steering pad switch assembly connector.

      A015ZHAE06

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      k1-10 (AU1) - k1-8 (EAU) No switch is pushed 95 to 105 kΩ
      k1-10 (AU1) - k1-8 (EAU) Seek+ switch: pushed Below 2.5 Ω
      k1-10 (AU1) - k1-8 (EAU) Seek- switch: pushed 313.5 to 346.5 Ω
      k1-10 (AU1) - k1-8 (EAU) Volume+ switch: pushed 959.5 to 1060.5 Ω
      k1-10 (AU1) - k1-8 (EAU) Volume- switch: pushed 3049.5 to 3370.5 Ω
      k1-9 (AU2) - k1-8 (EAU) No switch is pushed 95 to 105 kΩ
      k1-9 (AU2) - k1-8 (EAU) MODE switch: pushed Below 2.5 Ω

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT SPIRAL CABLE


    1. A0160HPE94

      Disconnect the steering pad switch assembly and spiral cable connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      k1-8 (EAU) - J24-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      k1-10 (AU1) - J24-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      k1-9 (AU2) - J24-5 (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 page shown in the brackets.



    NG

    REPLACE SPIRAL CABLE Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)