NAVIGATION SYSTEM Illumination Circuit

DESCRIPTION

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

WIRING DIAGRAM

A003YHFE02

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 steering pad switch assembly, multi-media module receiver assembly, multi-display switch, 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 multi-media module receiver assembly. B
      Illumination comes on for all components except multi-display switch. C
      No illumination comes on (steering pad switch assembly, multi-display switch, glove box, hazard switch, etc.). D
      Illumination comes on only for steering pad switch assembly. E

    B

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL) Click here

    C

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL) Click here

    D

    GO TO LIGHTING SYSTEM Click here

    E

    GO TO METER / GAUGE SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the H30 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
      H30-13 (IL+2) - Body ground

      Power switch off

      Light control switch in tail or head position

      		 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

    2. Check that the steering pad switch assembly illuminates according to the table below.

      A003V1WE05
      OK
      Connection Specified Condition

      Auxiliary battery positive (+) → 5 (IL+2)

      Auxiliary battery negative (-) → 8 (EAU)

      		 Switches of steering pad switch LH side illuminate.

      Auxiliary battery positive (+) → 5 (IL+2)

      Auxiliary battery negative (-) → 3 (-DP)

      		 Switches of steering pad switch RH side illuminate.
      Text in Illustration
      *a

      Component without harness connected

      (Steering Pad Switch Assembly)

      		 - -

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  4. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. Remove the spiral cable with sensor sub-assembly.

    2. A003XSFE05
      Text in Illustration
      *a

      Component without harness connected

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z4-8 (EAU) - H30-3 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z4-5 (IL+2) - H30-13 (IL+2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z4-3 (-DP) - H30-11 (-DP) Center Below 1 Ω
      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
      z4-8 (EAU) - H30-3 (EAU) Always Below 1 Ω
      z4-5 (IL+2) - H30-13 (IL+2) Always Below 1 Ω
      z4-3 (-DP) - H30-11 (-DP) Always Below 1 Ω

      Note


      • 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. Refer to the pages shown in the brackets.

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


    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - MULTI-MEDIA MODULE RECEIVER ASSEMBLY, BODY GROUND)


    1. Disconnect the H147 multi-media module receiver assembly connector.

    2. Disconnect the H30 spiral cable with sensor sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-32 (SWG) - H30-3 (EAU) Always Below 1 Ω
      H30-11 (-DP) - Body ground Always Below 1 Ω
      H147-32 (SWG) - 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

  6. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the H147 multi-media module receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H147-14 (ILL+) - Body ground

      Power switch off

      Light control switch in tail or head position

      		 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the H147 multi-media module receiver assembly connector.

    2. Disconnect the H19 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-13 (ILL-) - H19-10 (ILL-) Always Below 1 Ω
      H147-13 (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

  8. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the H89 multi-display switch connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H89-4 (ILL+) - Body ground

      Power switch off

      Light control switch in tail or head position

      		 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT MULTI-DISPLAY SWITCH


    1. Remove the multi-display switch.

    2. A003VWIE08
      Text in Illustration
      *a

      Component without harness connected

      (Multi-display Switch)

      Connect a positive (+) lead to terminal ILL+ and a negative (-) lead from the auxiliary battery to terminal ILL- of the multi-display switch connector.

    3. Check that the multi-display switch illumination comes on.

      OK
      Multi-display switch illumination comes on.

    NG

    REPLACE MULTI-DISPLAY SWITCH Click here

    OK

    REPAIR OR REPLACE HARNESS AND CONNECTOR (MULTI-DISPLAY SWITCH - COMBINATION METER ASSEMBLY)