NAVIGATION SYSTEM Steering Pad Switch Circuit

DTC Code DTC Name
Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch assembly to the multi-media module 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 multi-media module receiver assembly cannot be operated using the steering pad switch assembly, and also the multi-media module receiver assembly itself cannot function.

WIRING DIAGRAM

E283028E01

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.

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PROCEDURE

  1. INSPECT STEERING PAD SWITCH ASSEMBLY

    1. Remove the steering pad switch assembly.

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    2. Inspect the steering pad switch assembly.

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    Result

    Proceed to

    OK

    NG
    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY

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    OK

  2. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    1. Remove the spiral with sensor cable sub-assembly.

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    2. Inspect the spiral with sensor cable sub-assembly.

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    Result

    Proceed to

    OK

    NG
    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

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    OK

  3. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY)

    1. Disconnect the H45 multi-media module receiver assembly connector.

    2. Disconnect the G28 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

      H45-30 (SW1) - G28-6 (AU1)

      Always

      Below 1 Ω

      H45-31 (SW2) - G28-5 (AU2)

      Always

      Below 1 Ω

      H45-32 (SWG) - G28-4 (EAU)

      Always

      Below 1 Ω

      H45-30 (SW1) - Body ground

      Always

      10 kΩ or higher

      H45-31 (SW2) - Body ground

      Always

      10 kΩ or higher

      H45-32 (SWG) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR