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AUDIO AND VISUAL SYSTEM (w/o 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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INSPECTION PROCEDURE

Note:

  • The vehicle is equipped with an 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 fuse 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
      No illumination comes on (radio receiver assembly, hazard switch, heater control switch, etc.). C
      Illumination comes on only for steering pad switch assembly. D

  2. Click here

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. 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 Condition Specified Condition
      H30-13 (IL+2) - Body ground Light control switch in the tail or head position 11 to 14 V

  3. Click here

    INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the steering pad switch assembly connector.

    2. A003V1WE01

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

      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
      Table 1. Text in Illustration
      *a

      Component without harness connected

      (Steering Pad Switch Assembly)

      		 - -

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    INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


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

    2. A003XSFE04

      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 sub-assembly 5 times counterclockwise, measure the resistance 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 sub-assembly may break, do not rotate the spiral with sensor cable sub-assembly more than the specified amount.

      Tip:
      Table 2. Text in Illustration
      *a

      Component without harness connected

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

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    CHECK HARNESS AND CONNECTOR


    1. Disconnect the radio receiver assembly and spiral with sensor cable sub-assembly connectors.

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

      Standard Resistance
      Table 3. for 10 Speakers
      Tester Connection Condition Specified Condition
      H30-11 (-DP) - Body ground Always Below 1 Ω
      H52-6 (SWG) - H30-3 (EAU) Always Below 1 Ω
      H52-6 (SWG) - Body ground Always 10 kΩ or higher
      Table 4. for 6 Speakers
      Tester Connection Condition Specified Condition
      H30-11 (-DP) - Body ground Always Below 1 Ω
      H47-23 (SWG) - H30-3 (EAU) Always Below 1 Ω
      H47-23 (SWG) - Body ground Always 10 kΩ or higher

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    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

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    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the radio receiver assembly connector.

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

      Standard Voltage
      Table 5. for 10 Speakers
      Tester Connection Condition Specified Condition
      H51-2 (ILL+) - Body ground Light control switch in the tail or head position 11 to 14 V
      Table 6. for 6 Speakers
      Tester Connection Condition Specified Condition
      H48-10 (ILL+) - Body ground Light control switch in the tail or head position 11 to 14 V

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


    1. Disconnect the radio receiver assembly and combination meter assembly connectors.

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

      Standard Resistance
      Table 7. for 10 Speakers
      Tester Connection Condition Specified Condition
      H51-12 (ILL-) - H19-10 (ILL-) Always Below 1 Ω
      H51-12 (ILL-) - Body ground Always 10 kΩ or higher
      Table 8. for 6 Speakers
      Tester Connection Condition Specified Condition
      H49-5 (ILL-) - H19-10 (ILL-) Always Below 1 Ω
      H49-5 (ILL-) - Body ground Always 10 kΩ or higher

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    GO TO LIGHTING SYSTEMClick here

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    GO TO METER / GAUGE SYSTEMClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. Click here

    REPLACE STEERING PAD SWITCH ASSEMBLYClick here

  13. Click here

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLYClick here