NAVIGATION SYSTEM (for HDD) Illumination Circuit

DESCRIPTION

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

The display and navigation module display is connected to the combination meter assembly. The panel switch illumination for the display and navigation module display is controlled by the rheostat switch.

Tech Tips

If a malfunction occurs in the rheostat switch circuit, the rheostat switch controlled illumination for the display and navigation module display panel switches and other panel switches may not function correctly.

WIRING DIAGRAM


  1. w/o Daylight Running Light

    A015YZAE02

  2. w/ Daylight Running Light

    A015ZGPE02

INSPECTION PROCEDURE

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • 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.

PROCEDURE


  1. CHECK ILLUMINATION


    1. Check if the illumination for the display and navigation module display, steering pad switch assembly, glove box or others (hazard switch, etc.) comes on when the light control switch is turned to the tail or head position.

      Result
      Result Proceed to
      Illumination comes on for all components except steering pad switch assembly. A
      Illumination comes on for all components except display and navigation module display. B
      No illumination comes on (display and navigation module display, steering pad switch assembly, glove box or others (hazard switch, etc.)). C
      Neither the panel switch illumination for the display and navigation module display* nor other panel switch illumination* come on. (*Controlled by the rheostat switch) D

      Tech Tips

      If a malfunction occurs in the rheostat switch circuit, the rheostat switch controlled illumination for the display and navigation module display panel switches and other panel switches may not function correctly.


    B

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL) Click here

    C

    GO TO LIGHTING SYSTEM Click here

    D

    GO TO METER / GAUGE SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the J24 spiral cable sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J24-12 (IL+2) - Body ground Light control switch in tail or head 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A016014E09
      Text in Illustration
      *1

      Component without harness connected

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

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      k1-8 (EAU) - J24-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      k1-5 (IL+2) - J24-12 (IL+2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

      Note

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

      Tech Tips



    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR


    1. Disconnect the J122 display and navigation module display connector.

    2. Disconnect the J24 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
      J122-23 (SWG) - J24-4 (EAU) Always Below 1 Ω
      J122-23 (SWG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY


    1. A015YYTE07
      Text in Illustration
      *1

      Component without harness connected

      (Display and Navigation Module Display)

      Disconnect the J122 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
      J122-10 (GND1) - J122-23 (SWG) Always Below 1 Ω

    NG

    REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Click here

    OK

  6. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the k1 steering pad switch assembly connector.

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

      A0161KOE06

    3. Check that the switch illumination comes on.

      OK
      Steering pad switch illumination comes on.
      Text in Illustration
      *1

      Component without harness connected

      (Steering Pad Switch Assembly)

      		 - -

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

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

  7. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the J122 display and navigation module display connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J122-12 (ILL+) - Body ground Light control switch in tail or head 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR


    1. Disconnect the J122 display and navigation module display connector.

    2. Disconnect the J35 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J122-11 (ILL-) - J35-9 (ILL-) Always Below 1 Ω
      J122-11 (ILL-) - 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