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Home >> Lexus >> 2010 >> RX 350 FWD >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Back Door Closer (Diagnostic Codes & Symptom Tests) >> Back Door Closer System >> Back Door Closer does not Operate (To 8/2009) >> Procedure

Back Door Closer does not Operate (To 8/2009): Procedure

  1. CHECK BACK DOOR LOCK FUNCTION 
    1. Check if the back door can be fully closed by hand.

      OK

      The back door can be closed normally.

    NG → IMPROPER FIT OF BACK DOOR, OR A FOREIGN OBJECT IS STUCK IN BACK DOOR 

    OK: Go to next step 

  2. INITIALIZE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) 
    1. Perform the initialization of the power back door ECU (power back door motor unit). Refer to INITIALIZATION .

    NEXT: Go to next step 

  3. CHECK BACK DOOR CLOSER SYSTEM 
    1. Check back door closer system operation. Refer to OPERATION CHECK .

      OK

      The back door closer system operates normally.

    NG → See step   4 

    OK → END 

  4. READ VALUE USING TECHSTREAM (POWER BACK DOOR TOUCH SENSOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Back Door / Data List.
    5. Check the Data List to determine if the power back door touch sensor functions properly.
      BACK DOOR (POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT))

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PBD Touch Sensor (Right) Power back door touch sensor RH signal/ON, OFF or Open ON: Power back door touch sensor RH pressed
      OFF: Power back door touch sensor RH not pressed
      Open: Power back door touch sensor RH circuit open      		 -
      PBD Touch Sensor (Left) Power back door touch sensor LH signal/ON, OFF or Open ON: Power back door touch sensor LH pressed
      OFF: Power back door touch sensor LH not pressed
      Open: Power back door touch sensor LH circuit open      		 -

      Result

      Result Proceed to
      On the Techstream screen, ON or OFF is displayed accordingly. A
      On the Techstream screen, ON or OFF is not displayed accordingly or Open is displayed. B

    B → See step   10 

    A: Go to next step 

  5. CHECK DTC OUTPUT 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    2. Recheck for DTCs.

      Result

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

    C → See step   12 

    B → See step   11 

    A: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (POWER SOURCE) 
    1. Disconnect the P33 power back door ECU connector.
      Fig 1: Identifying P33 power back door ECU connector
      GTY269268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      P33-8 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      P33-10 (ECUB) - Body ground Always 11 to 14 V
      P33-12 (B) - Body ground Always 11 to 14 V
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Power Back Door ECU (Power Back Door Motor Unit))

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (BODY GROUND) 
    1. Disconnect the P33 power back door ECU connector.
      Fig 2: Identifying P33 power back door ECU connector
      GTY270706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P33-11 (GND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Power Back Door ECU (Power Back Door Motor Unit))

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  8. INSPECT BACK DOOR LOCK ASSEMBLY 
    1. Remove the back door lock assembly. Refer to REMOVAL .
    2. Check the operation of the back door closer motor.
      Fig 3: Identifying back door closer motor
      GTY281190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Apply battery voltage and check the operation of the door lock motor.

        OK

        Measurement Condition Specified Condition
        Battery positive (+) → 1 (M+)
        Battery negative (-) → 4 (M-)        		 Latch turns to full-latch position (clockwise rotation)
        Battery positive (+) → 4 (M-)
        Battery negative (-) → 1 (M+)        		 Latch turns to open-latch position (counterclockwise rotation)
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (Back Door Lock Assembly)
        *2 Counterclockwise
        *3 Clockwise
    3. Check the operation of the latch switch.
      Fig 4: Measure the resistance
      GTY262812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        CLOSE OPERATION

        Tester Connection Condition Specified Condition
        3 (ULSW) - 7 (E) Open-latch Below 1 Ω
        3 (ULSW) - 7 (E) Open-latch → Half-latch Below 1 Ω → 10 kΩ or higher
        3 (ULSW) - 7 (E) Half-latch 10 kΩ or higher
        3 (ULSW) - 7 (E) Full-latch 10 kΩ or higher
        3 (ULSW) - 7 (E) Over stroke 10 kΩ or higher → Below 1 Ω → 10 kΩ or higher
        OPEN OPERATION

        Tester Connection Condition Specified Condition
        3 (ULSW) - 7 (E) Full-latch 10 kΩ or higher
        3 (ULSW) - 7 (E) Half-latch 10 kΩ or higher
        3 (ULSW) - 7 (E) Half-latch → Open-latch 10 kΩ or higher → Below 1 Ω
        3 (ULSW) - 7 (E) Open-latch Below 1 Ω
    4. Check the operation of the pawl switch.
      Fig 5: Identifying pawl switch
      GTY260170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        CLOSE OPERATION

        Tester Connection Condition Specified Condition
        2 (FSW) - 7 (E) Open-latch 10 kΩ or higher
        2 (FSW) - 7 (E) Open-latch → Half-latch 10 kΩ or higher → Below 1 Ω → 10 kΩ or higher
        2 (FSW) - 7 (E) Half-latch 10 kΩ or higher
        2 (FSW) - 7 (E) Half-latch → Full-latch 10 kΩ or higher → Below 1 Ω → 10 kΩ or higher
        2 (FSW) - 7 (E) Full-latch 10 kΩ or higher
    5. Check the operation of the back door courtesy switch.
      Fig 6: Identifying back door courtesy switch
      GTY263229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        8 (CTY) - 7 (E) Open-latch Below 1 Ω
        8 (CTY) - 7 (E) Half-latch Below 1 Ω
        8 (CTY) - 7 (E) Full-latch 10 kΩ or higher
    6. Check the operation of the sector switch.
      Fig 7: Identifying sector switch
      GTY255989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        6 (DLSW) - 7 (E) Sector gear in neutral position (sector switch on) Below 1 Ω
        6 (DLSW) - 7 (E) Sector gear not in neutral position (sector switch off) 10 kΩ or higher
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (Back Door Lock Assembly)        		 *2 Sector Switch
        *3 Sector Gear - -

    NG → See step   13 

    OK: Go to next step 

  9. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU) 
    1. Disconnect the Y10 back door lock connector and P33 ECU connector.
      Fig 8: Identifying Y10 back door lock and P33 ECU connectors
      GTY253854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Y10-1 (M+) - P33-2 (DC+) Always Below 1 Ω
      Y10-4 (M-) - P33-1 (DC-) Always Below 1 Ω
      Y10-3 (ULSW) - P33-22 (HAF) Always Below 1 Ω
      Y10-6 (DLSW) - P33-24 (POS) Always Below 1 Ω
      Y10-8 (CTY) - P33-20 (FUL) Always Below 1 Ω
      Y10-2 (FSW) - P33-16 (PAWL) Always Below 1 Ω
      Y10-7 (E) - Body ground Always Below 1 Ω
      Y10-1 (M+) - Body ground Always 10 kΩ or higher
      Y10-4 (M-) - Body ground Always 10 kΩ or higher
      Y10-3 (ULSW) - Body ground Always 10 kΩ or higher
      Y10-6 (DLSW) - Body ground Always 10 kΩ or higher
      Y10-8 (CTY) - Body ground Always 10 kΩ or higher
      Y10-2 (FSW) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Back Door Lock Assembly)
      *2 Front view of wire harness connector
      (to Power Back Door ECU (Power Back Door Motor Unit))

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   14 

  10. GO TO OTHER FLOW CHART (TOUCH SENSOR CIRCUIT). Refer to  Touch Sensor Circuit 
  11. GO TO DTC CHART (B2250). Refer to  DTC B2250: Back Door Closer Operation Malfunction  
  12. GO TO DTC CHART (B2251). Refer to  DTC B2251: Back Door Closer Switch Malfunction  
  13. REPLACE BACK DOOR LOCK ASSEMBLY. Refer to  REMOVAL 
  14. REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT). Refer to  REMOVAL 
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