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 as to if the switch were continuously pressed. Therefore, the navigation receiver assembly cannot be operated using the steering pad switch assembly, and the navigation receiver assembly itself cannot function.

WIRING DIAGRAM


  1. Before October, 2010

    A01J8JDE12

  2. From October, 2010

    A01J8O4E25

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 precaution for Supplemental Restraint System Click here.

PROCEDURE


  1. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A01J9R6E44
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Navigation Receiver Assembly)

      Disconnect the L109 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
      L109-7 (SW1) - L109-6 (SWG) No switch pushed 95 to 105 kΩ
      L109-7 (SW1) - L109-6 (SWG) Seek+ switch pushed Below 2.5 Ω
      L109-7 (SW1) - L109-6 (SWG) Seek- switch pushed 323 to 335 Ω
      L109-7 (SW1) - L109-6 (SWG) Volume+ switch pushed 980 to 1020 Ω
      L109-7 (SW1) - L109-6 (SWG) Volume- switch pushed 3048 to 3172 Ω
      L109-8 (SW2) - L109-6 (SWG) No switch pushed 95 to 105 kΩ
      L109-8 (SW2) - L109-6 (SWG) MODE switch pushed Below 2.5 Ω
      L109-8 (SW2) - L109-6 (SWG) Voice switch pushed 3048 to 3172 Ω
      L109-8 (SW2) - L109-6 (SWG) On Hook switch pushed 323 to 335 Ω
      L109-8 (SW2) - L109-6 (SWG) Off Hook switch pushed 980 to 1020 Ω

    NG

    INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

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

  2. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


    1. A01J99CE01
      Text in Illustration
      *1

      Component without harness connected

      (Spiral with Sensor Cable Sub-assembly)
      *2 Steering Pad Switch Assembly Side
      *3 Vehicle Side

      Disconnect the steering pad switch assembly and spiral with sensor cable sub-assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z9-8 (EAU) - L52-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z9-10 (AU1) - L52-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z9-9 (AU2) - L52-5 (AU2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

      Note

      The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying. Refer to the pages shown in the brackets.

      Tech Tips



    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the z9 steering pad switch assembly connector.

      A01J8VJE01

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      z9-10 (AU1) - z9-8 (EAU) No switch pushed 95 to 105 kΩ
      z9-10 (AU1) - z9-8 (EAU) Seek+ switch pushed Below 2.5 Ω
      z9-10 (AU1) - z9-8 (EAU) Seek- switch pushed 323 to 335 Ω
      z9-10 (AU1) - z9-8 (EAU) Volume+ switch pushed 980 to 1020 Ω
      z9-10 (AU1) - z9-8 (EAU) Volume- switch pushed 3048 to 3172 Ω
      z9-9 (AU2) - z9-8 (EAU) No switch pushed 95 to 105 kΩ
      z9-9 (AU2) - z9-8 (EAU) MODE switch pushed Below 2.5 Ω
      z9-9 (AU2) - z9-8 (EAU) Voice switch pushed 3048 to 3172 Ω
      z9-9 (AU2) - z9-8 (EAU) On Hook switch pushed 323 to 335 Ω
      z9-9 (AU2) - z9-8 (EAU) Off Hook switch pushed 980 to 1020 Ω
      Text in Illustration
      *1

      Component without harness connected

      (Steering Pad Switch Assembly)

      		 *2 Volume+
      *3 Volume- *4 MODE
      *5 Seek- *6 Voice Switch
      *7 Off Hook *8 Seek+
      *9 On Hook - -

    3. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      NG (From October, 2010) A
      NG (Before October, 2010) B
      OK C

    B

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    C

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

    A

  4. INSPECT STEERING PAD SWITCH RH


    1. Disconnect the SR1 and z9 steering pad switch RH connectors.

      A01JAX2E02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      SR1-1 (AU1) - z9-10 (AU1) Always Below 1 Ω
      SR1-4 (EAU) - z9-8 (EAU) Always Below 1 Ω
      SR1-2 (AU2) - z9-9 (AU2) Always Below 1 Ω
      Text in Illustration
      *1

      Component without harness connected

      (Steering Pad Switch RH)

      		 - -

    NG

    REPLACE STEERING PAD SWITCH RH Click here

    OK

    REPLACE STEERING PAD SWITCH LH Click here