NAVIGATION SYSTEM(for HDD) Reverse Signal Circuit

DESCRIPTION

The navigation ECU sub-assembly a reverse signal from the park/neutral position switch assembly*1 or back-up light switch assembly*2 to use for adjusting the vehicle position on the display.


WIRING DIAGRAM

A00YV4HE01

PROCEDURE


  1. CHECK VEHICLE SIGNAL (OPERATION CHECK)


    1. A00YR2K

      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. A00YRSOC07
      *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 Ignition switch ON, shift lever in R 11 to 14 V
      G139-2 (REV) - Body ground Ignition switch ON, shift lever any position other than in R Below 1 V
      Result
      Proceed to
      OK
      NG (except Manual Transaxle)
      NG (for Manual Transaxle)

    OK

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

    NG (for Manual Transaxle)

    CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY) Click here

    NG (except Manual Transaxle)

  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. A00YX00C01
      *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 Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for K111F: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here
    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for U660F: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here
    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for U760E: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here
    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for U760F:

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY)


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

    2. Disconnect the B35 back-up light 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) - B35-1 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

  6. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY - BATTERY)


    1. A00YRVWC01
      *a

      Front view of wire harness connector

      (to Back-up Light Switch Assembly)

      Disconnect the back-up light switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B35-2 - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EA64: REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here
    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EA64F: REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here
    REPLACE BACK-UP LIGHT SWITCH ASSEMBLY for EB61F: REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR