AUDIO AND VISUAL SYSTEM (w/o Navigation 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 resulting condition is the same as if the switch were continuously depressed. Therefore, the audio system cannot be operated using the steering pad switch, and the audio system itself cannot function.

WIRING DIAGRAM

A0156IWE04

INSPECTION PROCEDURE

CAUTION:

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 the Precaution for the SRS Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - SPIRAL CABLE)


    1. Disconnect the F19 receiver connector.

    2. Disconnect the E12 cable connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F19-8 (SW2) - E12-5 (AU2) Always Below 1 Ω
      F19-6 (SWG) - E12-4 (EAU)
      F19-7 (SW1) - E12-6 (AU1)
      F19-8 (SW2) - Body ground Always 10 kΩ or higher
      F19-6 (SWG) - Body ground
      F19-7 (SW1) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT SPIRAL CABLE SUB-ASSEMBLY

    A01583GE13
    Text in Illustration
    *1 Vehicle Side *2 Steering Pad Switch Side

    1. Disconnect the z36 cable connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E12-4 (EAU) - z36-8 (EAU) Spiral cable is turned 2.5 rotations counterclockwise Below 1 Ω
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise
      E12-5 (AU2) - z36-9 (AU2) Spiral cable is turned 2.5 rotations counterclockwise Below 1 Ω
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise
      E12-6 (AU1) - z36-10 (AU1) Spiral cable is turned 2.5 rotations counterclockwise Below 1 Ω
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise

      CAUTION:

      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.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the z36 switch connector.

      A0155YIE08
      Text in Illustration
      *1 Volume+ *2 Volume-
      *3 Seek- *4 MODE
      *5 Seek+ *6 Off Hook
      *7 On Hook - -

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      10 (AU1) - 8 (EAU) No switch is pushed 95 to 105 kΩ
      Seek+ switch pushed Below 2.5 Ω
      Seek- switch pushed 312 to 345 Ω
      Volume+ switch pushed 950 to 1050 Ω
      Volume- switch pushed 2954 to 3265 Ω
      9 (AU2) - 8 (EAU) No switch is pushed 95 to 105 kΩ
      MODE switch pushed Below 2.5 Ω
      On hook switch pushed 312 to 345 Ω
      Off hook switch pushed 950 to 1050 Ω
      Voice switch pushed 2954 to 3265 Ω

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

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