AUDIO AND VISUAL SYSTEM(for 8 Inch Display) Steering Pad Switch Circuit

DESCRIPTION

This circuit sends operation signals from the steering pad switch assembly to the radio receiver assembly.

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

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

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

WIRING DIAGRAM

B002EPSE01

CAUTION / NOTICE / HINT

Note

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

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)


    1. Disconnect the K57 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K57-30 (SW1) - K57-32 (SWG) No switch pushed 99 to 101 kΩ
      Seek+ switch pushed Below 2.5 Ω
      Seek- switch pushed 326.7 to 333.3 Ω
      Volume+ switch pushed 998.9 to 1020.1 Ω
      Volume- switch pushed 3176.9 to 3242.1 Ω
      K57-31 (SW2) - K57-32 (SWG) No switch pushed 99 to 101 kΩ
      MODE switch pushed Below 2.5 Ω
      On hook switch pushed 326.7 to 333.3 Ω
      Off hook switch pushed 998.9 to 1020.1 Ω
      Voice switch pushed 3176.9 to 3242.1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

      Click here

    2. Inspect the steering pad switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. Remove the spiral cable with sensor sub-assembly.

      Click here

    2. Inspect the spiral cable with sensor sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)

    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here