NAVIGATION SYSTEM (for HDD) 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

A003YSJE01

INSPECTION PROCEDURE

Note


  • Inspect the fuse 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-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. A
      Illumination comes on for all components except multi-display switch. B
      No illumination comes on (steering pad switch assembly, multi-display switch, glove box, hazard switch, etc.). C

    B

    INSPECT MULTI-DISPLAY SWITCH (MULTI-DISPLAY SWITCH ILLUMINATION) Click here

    C

    GO TO LIGHTING SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the H30 spiral with sensor cable 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 Light control switch in the tail or head position 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


    1. A003XSFE05
      Text in Illustration
      *a

      Component without harness connected

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

      Disconnect the z4 steering pad switch assembly and H30 spiral with sensor cable sub-assembly connectors.

    2. 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 with sensor cable sub-assembly to the center position, rotate the spiral with sensor cable sub-assembly 2.5 times clockwise. Then while rotating the spiral with sensor cable as shown 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 with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying. Refer to the pages shown in the brackets.

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

      Tech Tips



    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR


    1. Disconnect the H60 display and navigation module display connector.

    2. Disconnect the H30 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
      H60-23 (SWG) - H30-3 (EAU) Always Below 1 Ω
      H30-11 (-DP) - Body ground Always Below 1 Ω
      H60-23 (SWG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT NAVIGATION COMPUTER SUB-ASSEMBLY


    1. A003ZVHE22
      Text in Illustration
      *a

      Component without harness connected

      (Navigation Computer Sub-assembly)

      Disconnect the H60 navigation computer sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H60-10 (GND1) - H60-23 (SWG) Always Below 1 Ω

    NG

    REPLACE NAVIGATION COMPUTER SUB-ASSEMBLY Click here

    OK

  6. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the z4 steering pad switch assembly connector.

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

      A003V1WE01
      OK
      Connection Specified Condition

      Auxiliary battery positive (+) → z4-5 (IL+2)

      Auxiliary battery negative (-) → z4-8 (EAU)

      		 Switches of steering pad switch LH side illuminates.

      Auxiliary battery positive (+) → z4-5 (IL+2)

      Auxiliary battery negative (-) → z4-3 (-DP)

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

      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. INSPECT MULTI-DISPLAY SWITCH (MULTI-DISPLAY SWITCH ILLUMINATION)


    1. A003VWIE02
      Text in Illustration
      *a

      Component without harness connected

      (Multi-display Switch)

      Disconnect the H89 multi-display switch connector.

    2. 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

  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 Light control switch in the tail or head position 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR


    1. Disconnect the H89 multi-display switch 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
      H89-14 (ILL-) - H19-11 (ILL-) Always Below 1 Ω
      H89-14 (ILL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    GO TO METER / GAUGE SYSTEM Click here