AUDIO AND VISUAL SYSTEM(for Radio Receiver Type) Steering Pad Switch Circuit

DESCRIPTION

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

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

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

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

WIRING DIAGRAM

B0026Z1E04

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.

for Type A: Click here

for Type B: Click here

for Type C: Click here

PROCEDURE


  1. 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

  2. CHECK VEHICLE CONDITION


    1. Check the vehicle condition.

      Result
      Result Proceed to
      w/ VSC A
      w/o VSC B

    B

    INSPECT SPIRAL CABLE SUB-ASSEMBLY Click here

    A

  3. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


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

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY AND BODY GROUND)


    1. Disconnect the G117 radio receiver assembly connector.

    2. Disconnect the G4 spiral with sensor cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G117-21 (SW1) - G4-6 (AU1) Always Below 1 Ω
      G117-22 (SW2) - G4-5 (AU2) Always Below 1 Ω
      G117-23 (SWG) - Body ground Always Below 1 Ω
      G4-3 (EAU) - Body ground Always Below 1 Ω
      G117-21 (SW1) or G4-6 (AU1) - Body ground Always 10 kΩ or higher
      G117-22 (SW2) or G4-5 (AU2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly.

      Click here

    2. Inspect the spiral cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY AND BODY GROUND)


    1. Disconnect the G117 radio receiver assembly connector.

    2. Disconnect the G4 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
      G117-21 (SW1) - G4-6 (AU1) Always Below 1 Ω
      G117-22 (SW2) - G4-5 (AU2) Always Below 1 Ω
      G117-23 (SWG) - Body ground Always Below 1 Ω
      G4-3 (EAU) - Body ground Always Below 1 Ω
      G117-21 (SW1) or G4-6 (AU1) - Body ground Always 10 kΩ or higher
      G117-22 (SW2) or G4-5 (AU2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR