NAVIGATION SYSTEM Steering Pad Switch Circuit

DESCRIPTION

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

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 same condition as when a switch is continuously depressed occurs.

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

WIRING DIAGRAM

A00ONSOE01

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 in the Supplemental Restraint System Click here.

PROCEDURE


  1. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly Click here.

      A00OMT3E03
      Text in Illustration
      *A w/ Transmission Shift Switch - -
      *1 Volume- Switch *2 Volume+ Switch
      *3 Seek- Switch *4 Seek+ Switch
      *5 MODE Switch *6 Off Hook Switch
      *7 On Hook Switch *8 Voice Switch

    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 is pushed Below 2.5 Ω
      Seek- switch is pushed 312 to 345 Ω
      Volume+ switch is pushed 950 to 1050 Ω
      Volume- switch is pushed 2954 to 3265 Ω
      9 (AU2) - 8 (EAU) No switch is pushed 95 to 105 kΩ
      MODE switch is pushed Below 2.5 Ω
      On Hook switch is pushed 312 to 345 Ω
      Off Hook switch is pushed 950 to 1050 Ω
      Voice switch is pushed 2954 to 3265 Ω

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  2. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


    1. A00ONTYE23
      Text in Illustration
      *a Steering Pad Switch Side
      *b Vehicle Side

      Remove the spiral with sensor cable sub-assembly Click here.

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

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

      CAUTION:

      The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying. Be sure to read the Precaution for the SRS Click here.


    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the D124 radio and display receiver assembly connector.

    2. Disconnect the D5 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
      D124-21 (SW1) - D5-6 (AU1) Always Below 1 Ω
      D124-22 (SW2) - D5-5 (AU2)
      D124-23 (SWG) - D5-4 (EAU)
      D124-21 (SW1) - Body ground Always 10 kΩ or higher
      D124-22 (SW2) - Body ground
      D124-23 (SWG) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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