AUDIO AND VISUAL SYSTEM Illumination Circuit

DESCRIPTION

Power is supplied to the illumination circuit for the radio receiver assembly and steering pad switch LH when the light control switch is in the TAIL or HEAD position.

WIRING DIAGRAM

A01190ME01

INSPECTION PROCEDURE

CAUTION:

The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read Precaution for the supplemental restraint system Click here.

Note

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

PROCEDURE


  1. CHECK ILLUMINATION


    1. Check if the illumination for the radio receiver assembly, steering pad switch LH or other parts (heater control switch, defogger switch, etc.) come 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. A
      Illumination comes on for all components except radio receiver. B
      Illumination comes on for all components except steering pad switch and radio receiver.
      No illumination (radio receiver, heater control switch, defogger switch, etc.) comes on. C

    B

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - BATTERY AND BODY GROUND) Click here

    C

    GO TO LIGHTING SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER - BATTERY AND BODY GROUND)


    1. A0119H5E05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Spiral Cable Sub-Assembly)

      Disconnect the D19 spiral cable sub-assembly connector.

    2. Disconnect the D63 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D19-4 (EAU) - D63-6 (SWG) Always Below 1 Ω
      D19-4 (EAU) - Body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D19-12 (IL+2) - Body ground Light control switch OFF Below 1 V
      Light control switch TAIL or HEAD 11 to 14 V

    5. Reconnect the spiral cable sub-assembly connector.

    6. Reconnect the radio receiver assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEERING PAD SWITCH LH

    A0119MGE01
    Text in Illustration
    *1 Steering Pad Switch LH

    1. Disconnect the V1 steering pad switch LH connector.

    2. Connect the positive (+) lead to terminal 5 (IL+2) and the negative (-) lead to terminal 8 (EAU) of the steering pad switch LH connector.

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

      OK
      Illumination for the steering pad switch LH comes on.

    4. Reconnect the steering pad switch LH connector.


    NG

    REPLACE STEERING PAD SWITCH LH Click here

    OK

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A011864E05
      Text in Illustration
      *1

      Component without harness connected

      (Spiral Cable Sub-Assembly)
      *2 Steering Pad Switch Side
      *3 Vehicle Side

      Disconnect the V1 and D19 spiral cable sub-assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V1-5 (IL+2) - D19-12 (IL+2) Spiral cable is turned 2.5 rotations counterclockwise Below 1 Ω
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise
      V1-8 (EAU) - D19-4 (EAU) Spiral cable is turned 2.5 rotations counterclockwise
      Spiral cable is centered
      Spiral cable is turned 2.5 rotations clockwise

      CAUTION:

      The spiral cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable sub-assembly may prevent the airbag from deploying. Be sure to read Precaution for the supplemental restraint system Click here.

    3. Reconnect the spiral cable sub-assembly connectors.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - BATTERY AND BODY GROUND)


    1. A0118YDE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the D61 radio receiver assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D61-10 (ILL+) - Body ground

      Light control switch

      TAIL or HEAD

      		 11 to 14 V
      Light control switch OFF Below 1 V

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      D61-7 (GND) - Body ground Always Below 1 Ω

    4. Reconnect the radio receiver assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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