NAVIGATION SYSTEM (for HDD) Steering Pad Switch Circuit

DESCRIPTION

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

If there is an open in the circuit, the navigation system cannot be operated using the steering pad switch assembly.

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

WIRING DIAGRAM

A017BEFE43

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A017CBYE80
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Navigation Receiver Assembly)

      Disconnect the E2 navigation receiver assembly connector.

    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 pushed 95 to 105 kΩ
      E2-7 (SW1) - E2-6 (SWG) Seek+ switch pushed Below 2.5 Ω
      E2-7 (SW1) - E2-6 (SWG) Seek- switch pushed 323 to 335 Ω
      E2-7 (SW1) - E2-6 (SWG) Volume+ switch pushed 980 to 1020 Ω
      E2-7 (SW1) - E2-6 (SWG) Volume- switch pushed 3048 to 3172 Ω
      E2-8 (SW2) - E2-6 (SWG) No switch pushed 95 to 105 kΩ
      E2-8 (SW2) - E2-6 (SWG) MODE switch pushed Below 2.5 Ω
      E2-8 (SW2) - E2-6 (SWG) Voice switch pushed 3048 to 3172 Ω
      E2-8 (SW2) - E2-6 (SWG) On Hook switch pushed 323 to 335 Ω
      E2-8 (SW2) - E2-6 (SWG) Off Hook switch pushed 980 to 1020 Ω

    NG

    INSPECT SPIRAL CABLE Click here

    OK

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

  2. INSPECT SPIRAL CABLE


    1. A017B52E33
      Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable)
      *b Steering Pad Switch Assembly Side
      *c Vehicle Side

      Disconnect the steering pad switch assembly 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 Click here

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the z2 steering pad switch assembly connector.

      A017EFEE01

    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 pushed 95 to 105 kΩ
      z2-10 (AU1) - z2-8 (EAU) Seek+ switch pushed Below 2.5 Ω
      z2-10 (AU1) - z2-8 (EAU) Seek- switch pushed 323 to 335 Ω
      z2-10 (AU1) - z2-8 (EAU) Volume+ switch pushed 980 to 1020 Ω
      z2-10 (AU1) - z2-8 (EAU) Volume- switch pushed 3048 to 3172 Ω
      z2-9 (AU2) - z2-8 (EAU) No switch pushed 95 to 105 kΩ
      z2-9 (AU2) - z2-8 (EAU) MODE switch pushed Below 2.5 Ω
      z2-9 (AU2) - z2-8 (EAU) Voice switch pushed 3048 to 3172 Ω
      z2-9 (AU2) - z2-8 (EAU) On Hook switch pushed 323 to 335 Ω
      z2-9 (AU2) - z2-8 (EAU) Off Hook switch pushed 980 to 1020 Ω
      Text in Illustration
      *a

      Component without harness connected

      (Steering Pad Switch Assembly)

      		 *b Volume-
      *c Volume+ *d Seek-
      *e Seek+ *f MODE
      *g On Hook *h Off Hook
      *i Voice - -

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

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