NAVIGATION SYSTEM(for HDD) Illumination Circuit

DTC Code DTC Name
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

E205532E03

CAUTION / NOTICE / HINT

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 - COMBINATION METER)Click here

    A

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

    1. E121218C04

      *a

      Front view of wire harness connector

      (to Spiral with Sensor Cable Sub-assembly)

      Disconnect the G28 spiral with sensor 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

      G28-12 (IL+2) - Body ground

      Light control switch TAIL or HEAD

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY

    1. Remove the steering pad switch assembly

      Click here

      E250967E01

    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.

      Result

      Result

      OK

      NG
    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY

    Click here

    OK

  4. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    1. Remove the spiral with sensor cable sub-assembly

      Click here

      E250971C04

      *a

      Steering Pad Switch Assembly Side

      *b

      Vehicle Side

    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 with sensor cable is turned 2.5 rotations counterclockwise

      Below 1 Ω

      Spiral with sensor cable is centered

      Spiral with sensor cable is turned 2.5 rotations clockwise

      5 (IL+2) - 12 (IL+2)

      Spiral with sensor cable is turned 2.5 rotations counterclockwise

      Spiral with sensor cable is centered

      Spiral with sensor cable is turned 2.5 rotations clockwise
      CAUTION:

      The spiral with sensor cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable may prevent the airbag from deploying. Be sure to read Precaution in the SRS section

      Click here

      Result

      Result

      OK

      NG
    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    Click here

    OK

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

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

    2. Disconnect the G28 spiral with sensor 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) - G28-4 (EAU)

      Always

      Below 1 Ω

      H4-23 (SWG) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. B122460C03

      *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

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - COMBINATION METER)

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

    2. Disconnect the G3 combination meter assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H4-11 (ILL-) - G3-3 (ILL-)

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR