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Home >> Toyota >> 2008 >> Highlander Base, FWD >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> (Door / Hatch) (Except Hybrid) >> Back Door Closer System >> Back Door Closer Does Not Operate >> Inspection Procedure

Inspection Procedure

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

    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 
    1. Check that the power back door drive unit (power back door ECU) can be initialized (See INITIALIZATION  ).
  3. CHECK BACK DOOR CLOSER SYSTEM 
    1. Check that the back door closer system operation.

      OK: Back door closer system operates normally. 

    NG: Go to step   4 

    OK: END 

  4. CHECK DTC OUTPUT 
    1. Check for the DTCs (See DTC CHECK/CLEAR  ).

      Result 

      RESULT TABLE

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

    B: GO TO DTC TABLE (B2250)  (See DTC B2250: BACK DOOR CLOSER OPERATION MALFUNCTION  )

    C: GO TO DTC TABLE (B2251)  (See DTC B2251: BACK DOOR CLOSER SWITCH MALFUNCTION  )

    A: Go to next step 

  5. INSPECT FUSE (ECU IG NO. 1, ECU-B) 
    1. Remove the ECU IG No. 1 fuse from the instrument panel junction block and ECU-B fuse from the engine room relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      ECU IG NO. 1 Always Below 1 Ω
      ECU-B Always Below 1 Ω

    NG: REPLACE FUSE 

    OK: Go to next step 

  6. CHECK FUSIBLE LINK BLOCK ASSEMBLY (PBD FUSE) 
    1. Remove the fusible link block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      A - B Always Below 1 Ω

      HINT:

      PBD 30A fuse is located in the fusible link block assembly.

      Fig 1: Identifying Fusible Link Block Assembly
      G05422019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FUSIBLE LINK BLOCK ASSEMBLY 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (BODY GROUND) 
    1. Disconnect the O15 power back door ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      O15-8 (IG) - Body ground Ignition switch on (IG) 11 to 14 V
      O15-10 (ECUB) - Body ground Always 11 to 14 V
      O15-12 (B) - Body ground Always 11 to 14 V
      Fig 2: Identifying O15 Connector Terminals
      G05422020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (POWER SOURCE) 
    1. Disconnect the O15 power back door ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      O15-11 (GND) - Body ground Always Below 1 Ω
      Fig 3: Identifying O15 Connector Terminals
      G05422021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  9. INSPECT BACK DOOR LOCK 
    1. Remove the back door lock.
      Fig 4: Identifying Back Door Lock
      G05420307Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage and check operation of the door lock motor.

      OK 

      MEASUREMENT SPECIFIED CONDITION TABLE

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 1 (DC+)
      Battery negative (-) → Terminal 2 (DC-)      		 Latch turns to full-latch position
      Battery positive (+) → Terminal 2 (DC-)
      Battery negative (-) → Terminal 1 (DC+)      		 Latch turns to open-latch position
    3. Measure the resistance of the switch.

      Standard resistance: Full-latch switch 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Door Lock Latch Position Specified Condition
      5 (HAF) - 4 (GND) Over-latch Below 1 Ω
      5 (HAF) - 4 (GND) Open-latch 10 kΩ or higher
      5 (HAF) - 4 (GND) Full-latch 10 kΩ or higher
      5 (HAF) - 4 (GND) Half-latch 10 kΩ or higher

      Back door courtesy light switch 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Door Lock Latch Position Specified Condition
      3 (BDCY) - 4 (GND) Open-latch Below 1 Ω
      3 (BDCY) - 4 (GND) Half-latch Below 1 Ω
      3 (BDCY) - 4 (GND) Full-latch 10 kΩ or higher
      3 (BDCY) - 4 (GND) Over-latch 10 kΩ or higher

    NG: REPLACE BACK DOOR LOCK  (See REMOVAL )

    OK: Go to next step 

  10. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU AND BODY GROUND) 
    1. Disconnect the T4 door lock connector.
    2. Disconnect the O15 ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      T4-1 (DC+) - O15-2 (DC+) Always Below 1 Ω
      T4-2 (DC-) - O15-1 (DC-) Always Below 1 Ω
      T4-5 (HAF) - O15-22 (HAF) Always Below 1 Ω
      T4-6 (POS) - O15-24 (POS) Always Below 1 Ω
      T4-3 (BDCY) - O15-20 (FUL) Always Below 1 Ω
      T4-4 (GND) - Body ground Always Below 1 Ω
      T4-1 (DC+) - Body ground Always 10 kΩ or higher
      T4-2 (DC-) - Body ground Always 10 kΩ or higher
      T4-5 (HAF) - Body ground Always 10 kΩ or higher
      T4-6 (POS) - Body ground Always 10 kΩ or higher
      T4-3 (BDCY) - Body ground Always 10 kΩ or higher
      Fig 5: Identifying Harness & Connector (Back Door Lock - Power Back Door ECU & Body Ground)
      G05422023Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)  (See REMOVAL  )

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