NAVIGATION SYSTEM Steering Pad Switch Circuit

DESCRIPTION

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

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 assembly, and also the radio and display receiver assembly itself cannot function.

WIRING DIAGRAM

A0055B1E11

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 Click here.

  • Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections 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.


    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  2. 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.


    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) Always Below 1 Ω
      D124-23 (SWG) - D5-4 (EAU) Always Below 1 Ω
      D124-21 (SW1) - Body ground Always 10 kΩ or higher
      D124-22 (SW2) - Body ground Always 10 kΩ or higher
      D124-23 (SWG) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR