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 navigation system cannot be operated using the steering pad switch.

If there is a short in the circuit, the resulting condition is the same as to if the switch were continuously pressed. Therefore, the navigation receiver assembly cannot be operated using the steering pad switch, and the navigation receiver assembly itself cannot function.

WIRING DIAGRAM

A017D17E03

INSPECTION PROCEDURE

Note

The vehicle is equipped with an SRS (Supplemental Restraint System). Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System Click here.

PROCEDURE


  1. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A017DVJE13

      Disconnect navigation receiver assembly connector E2.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      E2-7 (SW1) - E2-6 (SWG) No switch is pushed Approx. 100 kΩ
      E2-7 (SW1) - E2-6 (SWG) SEEK+ switch: pushed 0 to 2.5 Ω
      E2-7 (SW1) - E2-6 (SWG) SEEK- switch: pushed Approx. 0.3 kΩ
      E2-7 (SW1) - E2-6 (SWG) VOL+ switch: pushed Approx. 1 kΩ
      E2-7 (SW1) - E2-6 (SWG) VOL- switch: pushed Approx. 3.1 kΩ
      E2-8 (SW2) - E2-6 (SWG) No switch is pushed Approx. 100 kΩ
      E2-8 (SW2) - E2-6 (SWG) MODE switch: pushed 0 to 2.5 Ω
      E2-8 (SW2) - E2-6 (SWG) VOICE switch: pushed Approx. 3.1 kΩ
      E2-8 (SW2) - E2-6 (SWG) ON HOOK switch: pushed Approx. 0.3 kΩ
      E2-8 (SW2) - E2-6 (SWG) OFF HOOK switch: pushed Approx. 1 kΩ

    NG

    INSPECT SPIRAL CABLE Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT SPIRAL CABLE


    1. A017F4VE05

      Disconnect the steering pad switch and spiral cable connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      z2-8 (EAU) - D53-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z2-10 (AU1) - D53-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z2-9 (AU2) - D53-5 (AU2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

      Note

      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. Refer to the pages shown in the brackets.

      Tech Tips



    NG

    REPLACE SPIRAL CABLE

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect steering pad switch assembly connector z2.

      A017C5BE07

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      z2-10 (AU1) - z2-8 (EAU) No switch is pushed Approx. 100 kΩ
      z2-10 (AU1) - z2-8 (EAU) SEEK+ switch: pushed 0 to 2.5 Ω
      z2-10 (AU1) - z2-8 (EAU) SEEK- switch: pushed Approx. 0.3 kΩ
      z2-10 (AU1) - z2-8 (EAU) VOL+ switch: pushed Approx. 1 kΩ
      z2-10 (AU1) - z2-8 (EAU) VOL- switch: pushed Approx. 3.1 kΩ
      z2-9 (AU2) - z2-8 (EAU) No switch is pushed Approx. 100 kΩ
      z2-9 (AU2) - z2-8 (EAU) MODE switch: pushed 0 to 2.5 Ω
      z2-9 (AU2) - z2-8 (EAU) VOICE switch: push Approx. 3.1 kΩ
      z2-9 (AU2) - z2-8 (EAU) ON HOOK switch: pushed Approx. 0.3 kΩ
      z2-9 (AU2) - z2-8 (EAU) OFF HOOK switch: pushed Approx. 1 kΩ

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - SPIRAL CABLE)