LIGHTING SYSTEM Back-up Light Circuit

DESCRIPTION

The illumination of the back-up lights is controlled by release signals sent to the No. 3 semiconductor power integration ECU from the shift control ECU.

WIRING DIAGRAM

B000WTKE01

CAUTION / NOTICE / HINT

Note


  • First, confirm that there is no malfunction in the power integration system. Refer to the How to Proceed with Troubleshooting procedure.

    Click here

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

    Click here

PROCEDURE


  1. READ VALUE USING GTS


    1. Start the engine.

    2. Changes the shift lever R position.

    3. Using the GTS, read the Data List.

      Click here


      Body Electrical > Power Integration No.3 > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Status of Back-up Light Fuse Back-up light fuse Connect or Disconnect

      Connect: Fuse not shut off

      Disconnect: Fuse shut off

      		 -

      Body Electrical > Power Integration No.3 > Data List
      Tester Display
      Status of Back-up Light Fuse
      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

    NG

    CHECK BACK-UP LIGHT ASSEMBLY Click here

    OK

  2. READ VALUE USING GTS


    1. Start the engine.

    2. Using the GTS, read the Data List.

      Click here


      Body Electrical > Power Integration No.3 > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Back-up Light Input Signal Back-up light input condition OFF or ON

      OFF: Shift lever in any position other than R

      ON: Shift lever in R

      		 -

      Body Electrical > Power Integration No.3 > Data List
      Tester Display
      Back-up Light Input Signal
      OK
      Display changes according to shift lever operation.
      Result
      Proceed to
      OK
      NG

    NG

    CHECK SHIFT CONTROL ECU Click here

    OK

  3. READ VALUE USING GTS


    1. Start the engine.

    2. Using the GTS, read the Data List.

      Click here


      Body Electrical > Power Integration No.3 > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Back-up Light Output Signal Back-up light output condition OFF or ON

      OFF: Back-up light not illuminated

      ON: Back-up light illuminated

      		 -

      Body Electrical > Power Integration No.3 > Data List
      Tester Display
      Back-up Light Output Signal
      OK
      Display changes according to shift lever operation.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    OK

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


    1. B000V2BC03
      *a

      Front view of wire harness connector

      (to Back-up Light Assembly)

      Disconnect the back-up light assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      c6-3 (B/U) - Body ground Start the engine, shift lever R position 8 to 14 V
      Start the engine, shift lever except R position Below 3 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT ASSEMBLY - BODY GROUND)


    1. B000V2BC04
      *a

      Front view of wire harness connector

      (to Back-up Light Assembly)

      Disconnect the back-up light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c6-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BACK-UP LIGHT ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK SHIFT CONTROL ECU


    1. B000VWMC04
      *a

      Front view of wire harness connector

      (to No. 3 Semiconductor Power Integration ECU)

      Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the No. 3 semiconductor power integration ECU connector.

    3. Connect the cable to the negative (-) battery terminal.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      X99-11 (+S) - Body ground Start the engine, shift lever R position 6 V or higher
      Start the engine, shift lever except R position Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    NG

  7. CHECK HARNESS AND CONNECTOR (NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU - SHIFT CONTROL ECU)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the X99 No. 3 semiconductor power integration ECU connector.

    3. Disconnect the P74 shift control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X99-11 (+S) - P74-15 (BL) Always Below 1 Ω
      X99-11 (+S) or P74-15 (BL) - Body ground Always 10 kΩ or higher

    5. Connect the cable to the negative (-) battery terminal.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      X99-11 (+S) or P74-15 (BL) - Body ground Always Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SHIFT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. CHECK BACK-UP LIGHT ASSEMBLY


    1. Disconnect the c6 back-up light assembly connector.

    2. Start the engine.

    3. Changes the shift lever except R position.

    4. Changes the shift lever R position.

    5. Using the GTS, read the Data List.

      Click here


      Body Electrical > Power Integration No.3 > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Status of Back-up Light Fuse Back-up light fuse Connect or Disconnect

      Connect: Fuse not shut off

      Disconnect: Fuse shut off

      		 -

      Body Electrical > Power Integration No.3 > Data List
      Tester Display
      Status of Back-up Light Fuse
      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BACK-UP LIGHT ASSEMBLY Click here

    NG

  9. CHECK MULTI-DISPLAY


    1. Disconnect the P42 multi-display connector.

    2. Start the engine.

    3. Changes the shift lever except R position.

    4. Changes the shift lever R position.

    5. Using the GTS, read the Data List.

      Click here


      Body Electrical > Power Integration No.3 > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Status of Back-up Light Fuse Back-up light fuse Connect or Disconnect

      Connect: Fuse not shut off

      Disconnect: Fuse shut off

      		 -

      Body Electrical > Power Integration No.3 > Data List
      Tester Display
      Status of Back-up Light Fuse
      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTI-DISPLAY Click here

    NG

  10. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT CIRCUIT)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the X99 No. 3 semiconductor power integration ECU connector.

    3. Disconnect the c6 back-up light assembly connector.

    4. Disconnect the P42 multi-display connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X99-4 (L) or c6-3 (B/U) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR