NAVIGATION SYSTEM 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

A01ES1CE02

INSPECTION PROCEDURE

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.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA NODULE RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the E102 spiral cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F76-30 (SW1) - E102-6 (AU1) Always Below 1 Ω
      F76-31 (SW2) - E102-5 (AU2) Always Below 1 Ω
      F76-32 (SWG) - E102-4 (EAU) Always Below 1 Ω
      F76-30 (SW1) - Body ground Always 10 kΩ or higher
      F76-31 (SW2) - Body ground Always 10 kΩ or higher
      F76-32 (SWG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK NO. 1 SWITCH WIRE


    1. Disconnect the z54 and z51 No. 1 switch wire connectors.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      z54-11 - z51-6 Always Below 1 Ω
      z54-9 - z51-8 Always Below 1 Ω
      z54-10 - z51-7 Always Below 1 Ω
      z54-11 - Body ground Always 10 kΩ or higher
      z54-9 - Body ground Always 10 kΩ or higher
      z54-10 - Body ground Always 10 kΩ or higher

    NG

    REPLACE NO. 1 SWITCH WIRE

    OK

  3. 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

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly Click here.

    2. Inspect the spiral cable sub-assembly Click here.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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