NAVIGATION SYSTEM Illumination Circuit

DTC Code DTC Name
Illumination Circuit

DESCRIPTION

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

WIRING DIAGRAM

E342283E04

CAUTION / NOTICE / HINT

CAUTION:

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 precautionary notice for the Supplemental Restraint System (Click here).

Note:

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

  • Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections (Click here).

PROCEDURE

  1. CHECK ILLUMINATION

    1. Check if the illumination for the radio and display 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.

      Table 1. Result

      Result

      Proceed to

      Illumination comes on for all components except steering pad switch assembly.

      A

      Illumination comes on for all components except radio and display receiver assembly.

      B

      No illumination comes on (radio and display receiver assembly, hazard switch, heater control switch, etc.).

      C

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)Click here

    GO TO LIGHTING SYSTEM (INT)

    (Click here)

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

    1. U184804E03

      Disconnect the 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

      H130-13 (IL+2) - Body ground

      Light control switch tail or head position

      11 to 14 V
      Table 2. Text in Illustration

      *a

      Front view of wire harness connector

      (to Spiral with Sensor Cable Sub-assembly)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. INSPECT STEERING PAD SWITCH ASSEMBLY

    1. Remove the steering pad switch assembly (Click here).

    2. Inspect the steering pad switch assembly (Click here).

    REPLACE STEERING PAD SWITCH ASSEMBLY

    (Click here)

  4. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    1. Remove the spiral with sensor cable sub-assembly (Click here).

    2. Inspect the spiral with sensor cable sub-assembly (Click here).

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

    (Click here)

  5. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY)

    1. Disconnect the H105 radio and display receiver assembly connector.

    2. Disconnect the H130 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

      H105-23 (SWG) - H130-3 (EAU)

      Always

      Below 1 Ω

      H105-23 (SWG) - Body ground

      Always

      10 kΩ or higher

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

    1. U124070E02

      Disconnect the radio and display receiver assembly connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H107-10 (ILL+) - Body ground

      Light control switch in the tail or head position

      11 to 14 V
    Table 3. Text in Illustration

    *a

    Front view of wire harness connector

    (to Radio and Display Receiver Assembly)

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR