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NAVIGATION SYSTEM Illumination Circuit

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DTC Code DTC Name
  Illumination Circuit
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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.

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WIRING DIAGRAM

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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 inspection procedure.

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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 H22 spiral cable with sensor sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H22-13 (IL+2) - Body ground

      Power switch off

      Light control switch in tail or head position

      		 11 to 14 V

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    INSPECT STEERING PAD SWITCH ASSEMBLY


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

    2. A0009AXE16

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

      Table 1. Text in Illustration
      *a

      Component without harness connected

      (Steering Pad Switch Assembly)

      		 - -

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

      OK
      Illumination for the steering pad switch assembly comes on.

  4. Click here

    INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


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

    2. A0007CME05

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z5-5 (IL+2) - H22-13 (IL+2) Center 3 Ω or less
      2.5 rotations to the left
      2.5 rotations to the right
      z5-8 (EAU) - H22-3 (EAU) Center 3 Ω or less
      2.5 rotations to the left
      2.5 rotations to the right

    3. After setting the spiral cable with sensor sub-assembly to the center position, rotate the spiral cable with sensor sub-assembly 2.5 times clockwise. Then while rotating the spiral cable with sensor sub-assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z5-5 (IL+2) - H22-13 (IL+2) Always 3 Ω or less
      z5-8 (EAU) - H22-3 (EAU) Always 3 Ω or less
      Note:

      • Press and hold the lock located in the center of the spiral cable with sensor sub-assembly to rotate the spiral cable with sensor sub-assembly.

      • The spiral cable with sensor sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable with sensor sub-assembly may prevent the airbag from deploying.

      • As the spiral cable with sensor sub-assembly may break, do not rotate the spiral cable with sensor sub-assembly more than the specified amount.

      Table 2. Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable with Sensor Sub-assembly)
      *b Steering Pad Switch Assembly Side
      *c Vehicle Side

    • OK

      REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - RADIO RECEIVER ASSEMBLY, BODY GROUND)

    • NG

      REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY (Click here)

  5. Click here

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the H97 radio receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H97-14 (ILL+) - Body ground

      Power switch off

      Light control switch in tail or head position

      		 11 to 14 V

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

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


    1. Disconnect the H97 radio receiver assembly connector.

    2. Disconnect the H14 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H97-13 (ILL-) - H14-39 (ILL-) Always Below 1 Ω
      H97-13 (ILL-) - Body ground Always 10 kΩ or higher

    • OK

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

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR