NAVIGATION SYSTEM (for HDD) Illumination Circuit

DESCRIPTION

Power is supplied to the display and navigation module display and the steering pad switch illumination when the light control switch is in the TAIL or HEAD position.

WIRING DIAGRAM

A009941E01

INSPECTION PROCEDURE

CAUTION:

The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution in the SRS section Click here.

PROCEDURE


  1. CHECK ILLUMINATION


    1. Check if the illumination for the display and navigation display, steering pad switch, glove box or other parts (hazard switch, transmission control switch, etc.) comes on when the light control switch is turned to the HEAD or TAIL position.

      Result
      Result Proceed to
      Illumination comes on for all components except steering pad switch A
      Illumination comes on for all components except display and navigation module display B
      No illumination comes on (display and navigation module display, hazard switch, glove box, etc.) C
      Illumination comes on for all components except steering pad switch and display and navigation module display D

    B

    CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BATTERY) Click here

    C

    GO TO LIGHTING SYSTEM Click here

    D

    CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BODY GROUND) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BATTERY)


    1. A0094QYE30
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)

      Disconnect the G40 spiral cable sub-assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G40-12 (IL+2) - Body ground Light control switch TAIL or HEAD 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly Click here.

      A0097CDE13

    2. Connect the positive (+) lead of the battery to terminal 5 (IL+2) and the negative (-) lead of the battery to terminal 8 (EAU) of the steering pad switch assembly connector.

    3. Check if the illumination for the steering pad switch assembly comes on.

      OK
      Illumination for the steering pad switch assembly comes on.

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A0094SWE21
      Text in Illustration
      *a Steering Pad Switch Assembly Side
      *b Vehicle Side

      Remove the spiral cable sub-assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      8 (EAU) - 4 (EAU) Spiral cable is turned 2.5 rotations counterclockwise Below 1 Ω
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise
      5 (IL+2) - 12 (IL+2) Spiral cable is turned 2.5 rotations counterclockwise
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise

      CAUTION:

      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. Be sure to read Precaution in the SRS section Click here.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - SPIRAL CABLE)


    1. Disconnect the H4 display and navigation module display connector.

    2. Disconnect the G40 spiral cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H4-23 (SWG) - G40-4 (EAU) Always Below 1 Ω
      H4-23 (SWG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

  6. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BATTERY)


    1. A0094UZE45
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Display and Navigation Module Display)

      Disconnect the H4 display and navigation module display connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H4-12 (ILL+) - Body ground Light control switch TAIL or HEAD 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

  7. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - BODY GROUND)


    1. A0094UZE50
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Display and Navigation Module Display)

      Disconnect the H4 display and navigation module display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H4-11 (ILL-) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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