NAVIGATION SYSTEM(for HDD) Reverse Signal Circuit

DESCRIPTION

The navigation ECU sub-assembly a reverse signal from the park/neutral position switch assembly to use for adjusting the vehicle position on the display.

WIRING DIAGRAM

A01QPG6E01
*a from GAUGE Fuse
*b REV
*c Park/Neutral Position Switch Assembly
*d Navigation ECU Sub-assembly

PROCEDURE


  1. CHECK VEHICLE SIGNAL (OPERATION CHECK)


    1. A01QU43

      Enter the "Function Check/Setting I" mode and select "Vehicle Signal".

      Click here

    2. Check that the display changes between ON and OFF according to the shift lever position.

      OK
      Shift Lever Position Display
      R ON
      Except R OFF

      Tech Tips

      This display is updated once per second. As a result, it is normal for the display to lag behind the actual shift lever position.

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK NAVIGATION ECU SUB-ASSEMBLY (REVERSE SIGNAL)


    1. A01QPEBC07
      *a

      Front view of wire harness connector

      (to Navigation ECU Sub-assembly)

      Disconnect the navigation ECU sub-assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G139-2 (REV) - Body ground Engine switch on (IG), shift lever in R 11 to 14 V
      G139-2 (REV) - Body ground Engine switch on (IG), shift lever any position other than in R Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)


    1. Disconnect the G139 navigation ECU sub-assembly connector.

    2. Disconnect the B36 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G139-2 (REV) - B36-2 (RL) Always Below 1 Ω
      G139-2 (REV) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - BATTERY)


    1. A01QU4BC01
      *a

      Front view of wire harness connector

      (to Park/Neutral Position Switch Assembly)

      Disconnect the park/neutral position switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B36-1 (RB) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR