NAVIGATION SYSTEM (for DVD) Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch to the navigation 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 navigation receiver assembly cannot be operated using the steering pad switch and the navigation receiver assembly itself cannot function.

WIRING DIAGRAM

A003DW4E03

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.

      A003BGBE01

    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
      Text in Illustration
      *1 Volume- Switch *6 Off Hook Switch
      *2 Volume+ Switch *7 On Hook Switch
      *3 Seek- Switch *8 Voice Switch
      *4 Seek+ Switch *9 w/ Transmission Shift Switch
      *5 MODE Switch - -

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  2. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A003DUQE02
      Text in Illustration
      *1 Steering Pad Switch Side
      *2 Vehicle Side

      Remove the spiral 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 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 in the Supplemental Restraint System Click here.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. A003CK7E02

      Disconnect the D24 navigation receiver connector.

    2. A003BMAE02

      Disconnect the D5 spiral cable connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D24-7 (SW1) - D5-6 (AU1) Always Below 1 Ω
      D24-8 (SW2) - D5-5 (AU2)
      D24-6 (SWG) - D5-4 (EAU)
      D24-7 (SW1) - Body ground Always 10 kΩ or higher
      D24-8 (SW2) - Body ground
      D24-6 (SWG) - Body ground
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Navigation Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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