NAVIGATION SYSTEM Illumination Circuit

DESCRIPTION

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

WIRING DIAGRAM


  1. w/ Front Center Speaker

    A01CG6ZE02

  2. w/o Front Center Speaker

    A01CCQ4E04

INSPECTION PROCEDURE

Note

The vehicle is equipped with an SRS (Supplemental Restraint System). Before servicing (including removal or installation of parts), be sure to read the precautionary notices for Supplemental Restraint System Click here.

PROCEDURE


  1. CHECK ILLUMINATION


    1. Check if the illumination for the navigation ECU sub-assembly, steering pad switch assembly, glove box or others (hazard switch, transmission control 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 navigation ECU sub-assembly. B
      No illumination comes on (navigation ECU sub-assembly, hazard switch, glove box, etc.). C

    B

    CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL) Click here

    C

    GO TO LIGHTING SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the G3 spiral cable sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G3-12 (IL+2) - Body ground Light control switch in tail or head position 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. A01CBBWE83
      Text in Illustration
      *a

      Component without harness connected

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

      Disconnect the z7 steering pad switch assembly connector.

    2. Disconnect the G3 spiral cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z7-8 (EAU) - G3-4 (EAU) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z7-5 (IL+2) - G3-12 (IL+2) Center Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right

    4. After setting the spiral cable sub-assembly to the center position, rotate the spiral cable sub-assembly 2.5 times clockwise. Then while rotating the spiral cable sub-assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z7-8 (EAU) - G3-4 (EAU) Always Below 1Ω
      z7-5 (IL+2) - G3-12 (IL+2) Always Below 1 Ω

      Note


      • 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. Refer to the pages shown in the brackets.

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

      Tech Tips



    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - NAVIGATION ECU SUB-ASSEMBLY)


    1. Disconnect the F23 navigation ECU sub-assembly connector (w/ Front Center Speaker).

    2. Disconnect the F36 navigation ECU sub-assembly connector (w/o Front Center Speaker).

    3. Disconnect the G3 spiral cable sub-assembly connector.

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

      Standard Resistance
      w/ Front Center Speaker
      Tester Connection Condition Specified Condition
      F23-32 (SWG) - G3-4 (EAU) Always Below 1 Ω
      F23-32 (SWG) - Body ground Always 10 kΩ or higher
      w/o Front Center Speaker
      Tester Connection Condition Specified Condition
      F36-23 (SWG) - G3-4 (EAU) Always Below 1 Ω
      F36-23 (SWG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the z7 steering pad switch assembly connector.

    2. Connect a positive (+) lead from the battery to terminal IL+2 and a negative (-) lead to terminal EAU of the steering pad switch assembly connector.

      A01CGIDE01

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

      OK
      Illumination for the steering pad switch assembly comes on.
      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

  6. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the F23 navigation ECU sub-assembly connector (w/ Front Center Speaker).

    2. Disconnect the F34 navigation ECU sub-assembly connector (w/o Front Center Speaker).

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

      Standard Voltage
      w/ Front Center Speaker
      Tester Connection Condition Specified Condition
      F23-14 (ILL+) - Body ground Light control switch in tail or head position 11 to 14 V
      w/o Front Center Speaker
      Tester Connection Condition Specified Condition
      F34-10 (ILL+) - Body ground 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 (NAVIGATION ECU SUB-ASSEMBLY - BODY GROUND)


    1. Disconnect the F23 navigation ECU sub-assembly connector (w/ Front Center Speaker).

    2. Disconnect the F34 navigation ECU sub-assembly connector (w/o Front Center Speaker).

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

      Standard Resistance
      w/ Front Center Speaker
      Tester Connection Condition Specified Condition
      F23-13 (ILL-) - Body ground Always Below 1 Ω
      w/o Front Center Speaker
      Tester Connection Condition Specified Condition
      F34-7 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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