POWER BACK DOOR SYSTEM Power Back Door cannot be Operated Using Any Switch

DESCRIPTION

When the power back door cannot be operated using any switch, one of the following may be the cause: 1) initialization of the power back door ECU, or a malfunction in the 2) power back door touch sensor circuit, 3) power back door main switch circuit, 4) back door closer system, 5) meter/gauge system, or 6) main body ECU (instrument panel junction block), or 7) power back door drive unit (power back door ECU).

WIRING DIAGRAM

A017BKSE04

INSPECTION PROCEDURE

PROCEDURE


  1. INITIALIZE POWER BACK DOOR ECU


    1. Check that the power back door drive unit (power back door ECU) can be initialized Click here.


    NEXT

  2. CHECK POWER BACK DOOR SYSTEM


    1. Check the power back door system operation.

      OK
      Power back door system operates normally.

    NG

    CHECK BACK DOOR CLOSER SYSTEM Click here

    OK

    END

  3. CHECK BACK DOOR CLOSER SYSTEM


    1. Check the back door closer system operation. Click here


    NG

    BACK DOOR CLOSER SYSTEM Click here

    OK

  4. CHECK COMBINATION METER


    1. Check the A/T shift position indicator operation.

    2. Check that the speedometer indicates 0 mph when the vehicle is stopped and the engine idling.


    NG

    METER / GAUGE SYSTEM Click here

    OK

  5. CHECK DTC OUTPUT


    1. Check for the DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      B2250 is output B
      B2251 is output C

    B

    GO TO DTC CHART Click here

    C

    GO TO DTC CHART Click here

    A

  6. READ VALUE ON INTELLIGENT TESTER


    1. Check the Data List to determine if the back door lock function properly.

      Main body ECU (Instrument panel junction block)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Dor Open Back door lock / Permit or prohibit

      Permit: Back door is unlocked

      Prohibt: Back door is locked

      		 -
      OK
      The back door functions as specified in the normal condition.

    NG

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

    OK

  7. READ VALUE ON INTELLIGENT TESTER


    1. Check the Data List to determine if the power back door touch sensor function properly.

      Back door (Power back door ECU)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PBD Touch Sen L Power back door touch sensor LH signal / ON or OFF

      ON: Power back door touch sensor LH pressed

      OFF: Power back door touch sensor LH not pressed

      		 -
      PBD Touch Sen R Power back door touch sensor RH signal / ON or OFF

      ON: Power back door touch sensor RH pressed

      OFF: Power back door touch sensor RH not pressed

      		 -
      OK
      The power back door touch sensor functions as specified in the normal condition.

    NG

    GO TO OTHER FLOW CHART Click here

    OK

  8. READ VALUE ON INTELLIGENT TESTER


    1. Check the Data List to determine if the power back door main switch function properly.

      Back door (Power back door ECU)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PBD Main SW Power back door main switch / ON or OFF

      ON: Power back door main switch is not pushed

      OFF: Power back door main switch is pushed

      		 -
      OK
      The power back door main switch functions as specified in the normal condition.

    NG

    INSPECT POWER BACK DOOR MAIN SWITCH Click here

    OK

    REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) Click here

  9. INSPECT POWER BACK DOOR MAIN SWITCH


    1. A017BFIE01

      Remove the power back door main switch Click here.

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

      Standard resistance
      Tester Connection Switch Position Specified Condition
      1 - 2 Free (OFF) 10 kΩ or higher
      1 - 2 Pushed (ON) Below 1 Ω

    NG

    REPLACE POWER BACK DOOR MAIN SWITCH Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR MAIN SWITCH - POWER BACK DOOR ECU)


    1. A017FO0E02

      Disconnect the E14 switch connector.

    2. Disconnect the O14 ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E14-1 (UL) - O14-17 (MSW) Always Below 1 Ω
      E14-2 (E) - Body ground Always Below 1 Ω
      E14-1 (UL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) Click here