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

A01EV6GE02

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 navigation ECU sub-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 navigation ECU sub-assembly. B
      No illumination comes on (navigation ECU sub-assembly, hazard switch, heater control switch, 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 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
      I28-13 (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 STEERING PAD SWITCH ASSEMBLY


    1. Disconnect the steering pad switch assembly connector.

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

      A01EZ20E02

    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

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Disconnect the steering pad switch assembly connector.

    2. Disconnect the spiral cable sub-assembly connector.

    3. A01EY5AE05
      Text in Illustration
      *a

      Component without harness connected

      (Spiral Cable Sub-assembly)
      *b Steering Pad Switch Assembly 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 Below 1 Ω
      2.5 rotations to the left
      2.5 rotations to the right
      z3-3 (-DP) - I28-11 (-DP) 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 as shown in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      z3-5 (IL+2) - I28-13 (IL+2) Always Below 3 Ω
      z3-3 (-DP) - I28-11 (-DP) Always Below 3 Ω

      Note


      • Press and hold the lock located in the center of the spiral cable sub-assembly to rotate the spiral cable sub-assembly.

      • 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

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

  5. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the navigation ECU sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I64-10 (ILL+) - Body ground Light control switch in the tail or head position 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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