AUDIO AND VISUAL SYSTEM Steering Pad Switch Circuit

DESCRIPTION

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

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

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 LH, and the radio receiver assembly itself cannot function.

WIRING DIAGRAM

B007UNWE02

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 precautionary notice for the SRS Click here.

PROCEDURE


  1. INSPECT STEERING PAD SWITCH LH


    1. Remove the steering pad switch LH Click here.

    2. Inspect the steering pad switch LH Click here.


    NG

    REPLACE STEERING PAD SWITCH LH Click here

    OK

  2. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly Click here.

    2. Inspect the spiral cable sub-assembly Click here.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)


    1. Disconnect the I1 and I2 radio receiver assembly connectors.

    2. Disconnect the H77 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
      I1-4 (SW1) - H77-6 (AU1) Always Below 1 Ω
      I1-5 (SW2) - H77-5 (AU2) Always Below 1 Ω
      I2-9 (SWG) - H77-3 (EAU) Always Below 1 Ω
      I1-4 (SW1) - Body ground Always 10 kΩ or higher
      I1-5 (SW2) - Body ground Always 10 kΩ or higher
      I2-9 (SWG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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