Click here

NAVIGATION SYSTEM Illumination Circuit

Click here
Click here
DTC Code DTC Name
  Illumination Circuit
Click here

DESCRIPTION

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

Click here

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

Note:

  • The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

    Click here

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

Click here

PROCEDURE


  1. Click here

    CHECK ILLUMINATION


    1. Check if the illumination for the radio receiver assembly, steering pad switch assembly, heater control switch or others (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 assembly. A
      Illumination comes on for all components except radio receiver assembly. B
      Illumination comes on only for steering pad switch assembly. C
      No illumination comes on (radio receiver assembly, hazard switch, heater control switch, etc.). D

  2. Click here

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the O25 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
      O25-13 (IL+2) - Body ground Light control switch in tail or head position 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

      w/ Lane Departure Alert System:Click here

      w/o Lane Departure Alert System:Click here

    2. Inspect the steering pad switch assembly.

      w/ Lane Departure Alert System:Click here

      w/o Lane Departure Alert System:Click here

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPLACE STEERING PAD SWITCH ASSEMBLY w/ Lane Departure Alert System:Click here

      REPLACE STEERING PAD SWITCH ASSEMBLY w/o Lane Departure Alert System:Click here

  4. Click here

    INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly.

      Click here

    2. Inspect the spiral cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY OR RADIO RECEIVER ASSEMBLY - BODY GROUND)


    1. Disconnect the O146 radio receiver assembly connector.

    2. Disconnect the O25 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
      O146-24 (SWG) - O25-3 (EAU) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the O147 radio receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O147-15 (ILL+) - Body ground Light control switch in tail or head position 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the O147 radio receiver assembly connector.

    2. Disconnect the O3 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O147-16 (ILL-) - O3-39 (ILL-) Always Below 1 Ω
      O147-16 (ILL-) or O3-39 (ILL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR