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NAVIGATION SYSTEM (for DVD) Steering Pad Switch Circuit

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DTC Code DTC Name
  Steering Pad Switch Circuit
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DESCRIPTION

This circuit sends an operation signal from the steering pad switch assembly to the display and navigation module display.

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

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

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)


    1. Disconnect the H60 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H60-25 (SW1) - H60-23 (SWG) No switch pushed 95 to 105 kΩ
      H60-25 (SW1) - H60-23 (SWG) Seek+ switch pushed Below 2.5 Ω
      H60-25 (SW1) - H60-23 (SWG) Seek- switch pushed 313 to 345 Ω
      H60-25 (SW1) - H60-23 (SWG) Volume+ switch pushed 950 to 1050 Ω
      H60-25 (SW1) - H60-23 (SWG) Volume- switch pushed 2955 to 3265 Ω
      H60-24 (SW2) - H60-23 (SWG) No switch pushed 95 to 105 kΩ
      H60-24 (SW2) - H60-23 (SWG) MODE switch pushed Below 2.5 Ω
      H60-24 (SW2) - H60-23 (SWG) Voice switch pushed 2955 to 3265 Ω
      H60-24 (SW2) - H60-23 (SWG) On hook switch pushed 313 to 345 Ω
      H60-24 (SW2) - H60-23 (SWG) Off hook switch pushed 950 to 1050 Ω

  2. Click here

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  3. Click here

    INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


    1. A003XSFE01

      Disconnect the z4 steering pad switch assembly and H30 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
      z4-8 (EAU) - H30-3 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z4-11 (AU1) - H30-6 (AU1) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z4-10 (AU2) - H30-5 (AU2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

    3. After setting the spiral with sensor cable sub-assembly to the center position, rotate the spiral with sensor cable sub-assembly 2.5 times clockwise. Then while rotating the spiral with sensor cable sub-assembly 5 times counterclockwise, measure the resistance as shown in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z4-8 (EAU) - H30-3 (EAU) Always Below 1 Ω
      z4-11 (AU1) - H30-6 (AU1) Always Below 1 Ω
      z4-10 (AU2) - H30-5 (AU2) Always Below 1 Ω
      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.

      • As the spiral with sensor cable sub-assembly may break, do not rotate the spiral with sensor cable with sensor sub-assembly more than the specified amount.

      Tip:
      Table 1. Text in Illustration
      *a

      Component without harness connected

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

  4. Click here

    INSPECT STEERING PAD SWITCH ASSEMBLY


    1. A003VPTE02

      Disconnect the z4 steering pad switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      z4-11 (AU1) - z4-8 (EAU) No switch pushed 95 to 105 kΩ
      z4-11 (AU1) - z4-8 (EAU) Seek+ switch pushed Below 2.5 Ω
      z4-11 (AU1) - z4-8 (EAU) Seek- switch pushed 313 to 345 Ω
      z4-11 (AU1) - z4-8 (EAU) Volume+ switch pushed 950 to 1050 Ω
      z4-11 (AU1) - z4-8 (EAU) Volume- switch pushed 2955 to 3265 Ω
      z4-10 (AU2) - z4-8 (EAU) No switch pushed 95 to 105 kΩ
      z4-10 (AU2) - z4-8 (EAU) MODE switch pushed Below 2.5 Ω
      z4-10 (AU2) - z4-8 (EAU) Voice switch pushed 2955 to 3265 Ω
      z4-10 (AU2) - z4-8 (EAU) On Hook switch pushed 313 to 345 Ω
      z4-10 (AU2) - z4-8 (EAU) Off Hook switch pushed 950 to 1050 Ω
      Table 2. Text in Illustration
      *a

      Component without harness connected

      (Steering Pad Switch Assembly)

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

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLYClick here

  7. Click here

    REPLACE STEERING PAD SWITCH ASSEMBLYClick here