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Home >> Lexus >> 2004 >> RX 330 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 449 (Power Back Door System - Diagnostics) >> Power Back Door Does Not Operate >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

  1. Conditions necessary for the power back door to open:
    1. Power back door off switch is in the ON position (switch pushed).
    2. Shift lever is in the P position when the ignition switch is ON (When the ignition switch is OFF, the power back door operates in any position of the shift lever.)
    3. Back door lock is unlocked (door lock position switch is in the ON position when the back door is fully closed).
    4. Back door is between the fully closed position and approximately the half-open position.
  2. Conditions necessary for the power back door to close:
    1. Power back door off switch is in the ON position (switch pushed).
    2. Shift lever is in the P position when the ignition switch is ON (When the ignition switch is OFF, the power back door operates in any position of the shift lever.)
    3. Back door is between approximately the half-open position and the fully open position.
    4. Back door touch sensor is not damaged or deformed.
  1. INSPECT FUSE (PBD, ECU-B, ECU-IG NO.1, AM1) 
    1. Remove the PBD fuse and ECU-B fuse from the FL block.
    2. Remove the ECU-IG No. 1 fuse and AM1 fuse from the instrument panel J/B.
    3. Check the resistance.

      Standard: Below 1 Ω 

    1. NG: REPLACE FUSE 
    2. OK: Go to next step. 
  2. CHECK DTC 
    1. Check for DTC B2222. DTC B2222 indicates a pulse sensor malfunction.
      1. Without code outputs, proceed to A.
      2. With code outputs, proceed to B.
    1. B: Go to  DTC B2222 PBD PULSE SENSOR MALFUNCTION  
    2. A: GO TO NEXT STEP. 
  3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
    1. Use the hand-held tester to check for normal function of the multiplex communication system.
      1. (ECU unconnected, communication line malfunctioning) Without DTC B1214, B1215 or B1287 outputs, proceed to A.
      2. (ECU unconnected, communication line malfunctioning) With DTC B1214, B1215 or B1287 outputs, proceed to B.
    1. B: Go to MULTIPLEX COMMUNICATION SYSTEM (see  DIAGNOSTIC TROUBLE CODE CHART  ) 
    2. A: GO TO NEXT STEP. 
  4. READ VALUE OF HAND-HELD TESTER (POWER BACK DOOR OFF SWITCH) 
    1. Check the DATA LIST for proper functioning of the power back door off switch.

      Standard: 

      Power back door ECU 

      DATA LIST CHART

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      PBD MAIN(1) SW Power back door off switch signal/OFF or ON OFF: Power back door off switch is not pushed -
      ON: Power back door off switch is pushed
      (1) "MAIN" appears on the display of the hand-held tester, however the name of the part corresponding to the display of the tester is "power back door off switch".
    1. OK: Go to step   7 
    2. NG: GO TO NEXT STEP. 
  5. INSPECT POWER BACK DOOR OFF SWITCH 
    1. Check the resistance of the switch.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

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

      HINT:

      Whether or not the switch illuminates does not affect the ON/OFF function of the switch. For the illumination check, refer to INSPECTION .

      Fig 1: Inspecting Power Back Door Off Switch
      G03009848Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE POWER BACK DOOR OFF SWITCH 
    2. OK: Go to next step. 
  6. CHECK WIRE HARNESS (POWER BACK DOOR OFF SWITCH - POWER BACK DOOR ECU) 
    1. Disconnect the P8 switch and P13 ECU connectors.
      2. Fig 2: Identifying P8 Switch And P13 ECU Connectors
      G03009849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      P8-1 - P13-5 (MSE) Below 1 Ω
      P8-2 - P13-6 (MSW) Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE POWER BACK DOOR ECU 
  7. CHECK SWITCH OPERATION 
    1. If the power back door does not respond to using the power back door opener/closer switch, proceed to A.
    2. If the power back door does not respond to using the back door opener switch (outside handle switch), proceed to B
    3. If the power back door does not respond to using the power back door closer switch, proceed to C
    1. B: Go to step   10 
    2. C: Go to step   13 
    3. A: GO TO NEXT STEP. 
  8. INSPECT POWER BACK DOOR OPENER/CLOSER SWITCH 
    1. Check the resistance of the switch.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Switch Position Specified Condition
      3 - 4 Pushed (ON) Below 1 Ω
      3 - 4 Free (OFF) 10 kΩ or higher

      HINT:

      Whether or not the switch illuminates does not affect the ON/OFF function of the switch. For the illumination check, refer to INSPECTION .

      Fig 3: Inspecting Power Back Door Opener/Closer Switch
      G03009850Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE POWER BACK DOOR OPENER/CLOSER SWITCH 
    2. OK: Go to next step. 
  9. CHECK WIRE HARNESS (POWER BACK DOOR OPENER/CLOSER SWITCH - MULTI-PREX NETWORK BODY ECU AND GROUND) 
    1. Disconnect the P9 switch and the B5 ECU connectors.
      2. Fig 4: Identifying P9 Switch And B5 ECU Connectors
      G03009851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      P9-3 - B5-2 (PBDS) Below 1 Ω
      P9-4 - Body ground Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: Go to step   15 
  10. READ VALUE OF HAND-HELD TESTER (BACK DOOR OPENER SWITCH) 
    1. Check the DATA LIST for proper functioning of the back door opener switch (outside handle switch).

      Standard (Power back door ECU): 

      DATA LIST CHART

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      DOOR HANDLE SW Back door opener switch (outside handle switch) signal/OFF or ON OFF: Back door opener switch is not pushed ON: Back door opener switch is pushed -
    1. OK: Go to step   15 
    2. NG: Go to next step. 
  11. INSPECT BACK DOOR OPENER SWITCH ASSY (OUTSIDE HANDLE SWITCH) 
    1. Check the resistance of the switch.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Switch Position Specified Condition
      1 - 2 Free 10 kΩ or higher
      1 - 2 Pushed Below 1 Ω
      Fig 5: Inspecting Back Door Opener Switch Assy (Outside Handle Switch)
      G03009852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE BACK DOOR OPENER SWITCH ASSY (OUTSIDE HANDLE SWITCH) 
    2. OK: Go to next step. 
  12. CHECK WIRE HARNESS (BACK DOOR OPENER SWITCH - POWER BACK DOOR ECU AND GROUND) 
    1. Disconnect the B13 switch and P13 ECU connectors.
    2. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      B13-2 - P13-3 (HSW) Below 1 Ω
      B13-1 - Body ground Below 1 Ω
      Fig 6: Back Door Opener Switch - Power Back Door ECU And Ground Connector Terminals
      G03009853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE POWER BACK DOOR ECU 
  13. INSPECT POWER BACK DOOR CLOSER SWITCH 
    1. Check the resistance of the switch.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Switch Position Specified Condition
      1 - 2 Pushed (ON) Below 1 Ω
      1 - 2 Free (OFF) 10 kΩ or higher
      Fig 7: Inspecting Power Back Door Closer Switch
      G03009854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE POWER BACK DOOR CLOSER SWITCH 
    2. OK: Go to next step. 
  14. CHECK WIRE HARNESS (POWER BACK DOOR CLOSER - POWER BACK DOOR ECU AND BODY GROUND) 
    1. Disconnect the P11 switch and P13 ECU connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      P11-1 - P13-4 (BDDN) Below 1 Ω
      P11-2 - Body ground Below 1 Ω
      Fig 8: Identifying Power Back Door Closer And Power Back Door ECU Connector Terminals
      G03009855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE POWER BACK DOOR ECU 
  15. READ VALUE OF HAND-HELD TESTER (POWER BACK DOOR TOUCH SENSOR LH) 
    1. Check the DATA LIST for proper functioning of the power back door touch sensor LH.

      Standard: 

      Power back door ECU 

      DATA LIST CHART

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      PBD TOUCH SEN L Power back door touch sensor LH signal/OFF, ON or OPEN OFF: Power back door touch sensor LH is free
      ON: Power back door touch sensor LH is pressed
      OPEN: Power back door touch sensor LH is open      		 -
    1. OK: Go to step   18 
    2. NG: GO TO NEXT STEP. 
  16. INSPECT POWER BACK DOOR TOUCH SENSOR LH 
    1. Check the resistance of the sensor.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Condition Specified condition
      1 - 2 Free Approx. 1 kΩ
      1 - 2 Pressed Below 100 Ω
      Fig 9: Inspecting Power Back Door Touch Sensor LH
      G03009856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE POWER BACK DOOR TOUCH SENSOR LH 
    2. OK: Go to next step. 
  17. CHECK WIRE HARNESS (POWER BACK DOOR TOUCH SENSOR LH - POWER BACK DOOR ECU) 
    1. Disconnect the P15 sensor and P13 ECU connectors.
      2. Fig 10: Identifying P15 Sensor And P13 ECU Connectors Terminals
      G03009857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      P15-1 (OSL) - P13-14 (OSL) Below 1 Ω
      P15-2 (OSLE) - P13-15 (OSE) Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE POWER BACK DOOR ECU 
  18. READ VALUE OF HAND-HELD TESTER (POWER BACK DOOR TOUCH SENSOR RH) 
    1. Check the DATA LIST for proper functioning of the power back door touch sensor RH.

      Standard: 

      Power back door ECU 

      DATA LIST CHART

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      PBD TOUCH SEN R Power back door touch sensor RH signal/OFF, ON or OPEN OFF: Power back door touch sensor RH is free
      ON: Power back door touch sensor RH is pressed
      OPEN: Power back door touch sensor RH is open      		 -
    1. OK: Go to step   21 
    2. NG: Go to next step. 
  19. INSPECT POWER BACK DOOR TOUCH SENSOR RH 
    1. Check the resistance of the sensor.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Condition Specified condition
      1 - 2 Free Approx. 1 kΩ
      1 - 2 Pressed Below 100 Ω
      Fig 11: Inspecting Power Back Door Touch Sensor RH
      G03009858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE POWER BACK DOOR TOUCH SENSOR RH 
    2. OK: Go to next step. 
  20. CHECK WIRE HARNESS (POWER BACK DOOR TOUCH SENSOR RH - POWER BACK DOOR ECU) 
    1. Disconnect the P16 sensor and P13 ECU connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      P16-1 (OSR) - P13-16 (OSR) Below 1 Ω
      P16-2 (OSRE) - P13-15 (OSE) Below 1 Ω
      Fig 12: Identifying P16 Sensor And P13 ECU Connectors
      G03009859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE POWER BACK DOOR ECU 
  21. PERFORM ACTIVE TEST USING HAND-HELD TESTER 
    1. Select the ACTIVE TEST, use the hand-held tester to generate a control command, and then check that the power back door drive unit operates.

      Standard: 

      Power back door ECU 

      ACTIVE TEST CHART

      Item Test Details Diagnostic Note
      PBD MOTOR Power back door motor operates OFF/FORWARD/REVERSE Clutch is OFF while power back door motor is operating
      PBD CLUTCH Power back door clutch operates OFF/ON Power back door motor is OFF when clutch is ON
    1. OK: Go to step   24 
    2. NG: GO TO NEXT STEP. 
  22. INSPECT POWER BACK DOOR DRIVE UNIT 
    1. Remove the unit.
    2. Connect the battery positive (+) lead to terminal 3 and battery negative (-) terminal lead to terminal 9.
    3. Apply battery voltage to the terminals and check the motor operation.

      Standard: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION CHART

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal 7 Open
      Battery negative (-) --> Terminal 8
      Battery positive (+) --> Terminal 8 Close
      Battery negative (-) --> Terminal 7
      Fig 13: Applying Battery Voltage To Terminals And Checking Motor Operation
      G03009860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check the resistance of the clutch terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      3 - 9 4.0 Ω
    5. Reinstall the unit with the connector connected.
    6. Reference:

      Check the pulse of the pulse sensor.

      1. Using an oscilloscope, check the pulse generated when the door is manually opened and closed.

        Standard: 

        PULSE REFERENCE CHART

        Terminal 1 - 6, 5 - 6
        Tool setting 10 V/DIV., 10 ms/DIV.
        Vehicle condition Door moving

        HINT:

        A cycle of the pulse changes between approx. 10 to 20 msec. according to the speeds that the back door is moving.

        Fig 14: Checking Pulse Generated When Door Is Manually Opened And Closed
        G03009861Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE POWER BACK DOOR DRIVE UNIT 
    2. OK: Go to next step. 
  23. CHECK WIRE HARNESS (POWER BACK DOOR DRIVE UNIT - POWER BACK DOOR ECU) 
    1. Disconnect the P12 unit and P13 ECU connectors.
      2. Fig 15: Identifying P12 Unit And P13 ECU Connectors
      G03009862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      P12-2 - P13-26 (DSV) Below 1 Ω
      P12-6 - P13-23 (DSG) Below 1 Ω
      P12-1 - P13-25 (DS1) Below 1 Ω
      P12-5 - P13-24 (DS2) Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: REPLACE POWER BACK DOOR ECU 
  24. READ VALUE OF HAND-HELD TESTER (POWER BACK DOOR SWITCH) 
    1. Check the DATA LIST for proper functioning of the power back door switches.

      Standard: 

      Power back door ECU 

      DATA LIST CHART

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      COURTESY SW Back door lock courtesy switch signal/OFF or ON OFF: Back door is closed -
      ON: Back door is open
      HALF RATCHET(1) SW Back door lock half-latch switch signal/OFF or ON OFF: Back door is closed -
      ON: Back door is not completely closed
      (1) RATCHET appears on the display of the hand-held tester, however the name of the part corresponding to the display of the tester is "half-latch".
    1. OK: Go to step   27 
    2. NG: GO TO NEXT STEP. 
  25. INSPECT BACK DOOR LOCK ASSY (see  INSPECTION  ) 
    1. NG: REPLACE BACK DOOR LOCK ASSY 
    2. OK: Go to next step. 
  26. CHECK WIRE HARNESS (BACK DOOR LOCK ASSY - POWER BACK DOOR ECU AND BODY GROUND) 
    1. Disconnect the B11 lock and P13 ECU connectors.
      2. Fig 16: Identifying B11 Lock And P13 ECU Connectors
      G03009863Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      B11-1 - P13-7 (CTYE) Below 1 Ω
      B11-8 - P13-21 (POS) Below 1 Ω
      B11-2 - P13-18 (FUL) Below 1 Ω
      B11-3 - P13-8 (HAF) Below 1 Ω
      B11-7 - P13-11 (DC-) Below 1 Ω
      B11-5 - P13-12 (DC+) Below 1 Ω
      B11-4 - Body ground Below 1 Ω
      B11-6 - Body ground Below 1 Ω
      B11-9 - Body ground Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: Go to next step. 
  27. REPLACE POWER BACK DOOR ECU 
    1. Check the power back door for normal OPEN/CLOSE operation.
    1. NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU) 
    2. OK: SYSTEM NORMAL 
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