AUDIO AND VISUAL SYSTEM (w/o Stereo Component Amplifier) Steering Pad Switch Circuit

DESCRIPTION

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

If there is a short in the circuit, the resulting condition is the same as if the switch were continuously depressed.

WIRING DIAGRAM

A0159EZE03

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) Always Below 1 Ω
      F19-7 (SW1) - E12-6 (AU1) Always Below 1 Ω
      F19-8 (SW2) - Body ground Always 10 kΩ or higher
      F19-6 (SWG) - Body ground Always 10 kΩ or higher
      F19-7 (SW1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT SPIRAL CABLE SUB-ASSEMBLY

    A01583GE11
    Text in Illustration
    *a Steering Pad Switch Side *b Vehicle Side

    1. Disconnect the cable connectors.

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

      Standard Resistance
      Tester Connection Spiral Cable Position Specified Condition
      E12-4 (EAU) - z36-8 (EAU) 2.5 rotations to the left Below 3 Ω
      Center
      2.5 rotations to the right
      E12-5 (AU2) - z36-9 (AU2) 2.5 rotations to the left Below 3 Ω
      Center
      2.5 rotations to the right
      E12-6 (AU1) - z36-10 (AU1) 2.5 rotations to the left Below 3 Ω
      Center
      2.5 rotations to the right

      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.

      A0157O5E03
      Text in Illustration
      *1 Volume+ *2 Volume-
      *3 Seek+ *4 Seek-
      *5 MODE - -

    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 100 kΩ
      Seek+ switch pushed Below 2.5 Ω
      Seek- switch pushed 329 Ω
      Volume+ switch pushed 1000 Ω
      Volume- switch pushed 3110 Ω
      9 (AU2) - 8 (EAU) No switch is pushed 100 kΩ
      MODE switch pushed Below 2.5 Ω

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

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