AUDIO AND VISUAL SYSTEM (for Radio Receiver Type) Illumination Circuit

DESCRIPTION

Power is supplied to the radio receiver assembly and steering pad switch LH illumination when the light control switch is in the tail or head position.

WIRING DIAGRAM

A01HSB7E03

INSPECTION PROCEDURE

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 fuse 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, 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 LH. A
      Illumination comes on for all components except radio receiver assembly. B
      Illumination comes on only for steering pad switch LH. C
      No illumination comes on (radio receiver assembly, hazard switch, heater control switch, etc.). D

    B

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL) Click here

    C

    GO TO METER / GAUGE SYSTEM Click here

    D

    GO TO LIGHTING SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the 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
      I28-13 (IL+2) - Body ground

      Power switch off

      Light control switch in the tail or head position

      		 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEERING PAD SWITCH LH


    1. Disconnect the steering pad switch LH connector.

    2. Connect a auxiliary battery positive (+) lead to terminal IL+2 and a negative (-) lead to terminal -DP of the steering pad switch LH connector.

      A01HUAAE02

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

      OK
      Illumination for the steering pad switch LH comes on.
      Text in Illustration
      *a

      Component without harness connected

      (Steering Pad Switch LH)

      		 - -

    NG

    REPLACE STEERING PAD SWITCH LH Click here

    OK

  4. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


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

    2. A01HTGFE09
      Text in Illustration
      *a

      Component without harness connected

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z3-5 (IL+2) - I28-13 (IL+2) Center 3 Ω or less
      2.5 rotations to the left
      2.5 rotations to the right
      z3-3 (-DP) - I28-11 (-DP) 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 as shown in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z3-5 (IL+2) - I28-13 (IL+2) Always 3 Ω or less
      z3-3 (-DP) - I28-11 (-DP) 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. Refer to the pages shown in the brackets.

      • 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.

      Tech Tips



    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

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

  5. 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
      Tester Connection Condition Specified Condition
      I148-10 (ILL+) - Body ground

      Power switch off

      Light control switch in the tail or head position

      		 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. 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
      Tester Connection Condition Specified Condition
      I149-5 (ILL-) - I18-4 (ILL-) Always Below 1 Ω
      I149-5 (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