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Section 786 (Power Door Lock Control System): Inspection

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. Master switch: INSPECT DRIVER'S DOOR LOCK CONTROL SWITCH CONTINUITY 
    CONTINUITY SPECIFICATION

    Switch position Tester connection Specified condition
    LOCK 3-4 Continuity
    OFF - No continuity
    UNLOCK 3-14 Continuity

    If continuity is not as specified, replace the switch.

    Fig 1: Inspecting Driver's Door Lock Control Switch Continuity
    G03375565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT PASSENGER'S DOOR LOCK CONTROL SWITCH CONTINUITY 
    CONTINUITY SPECIFICATION

    Switch position Tester connection Specified condition
    LOCK 3-2 Continuity
    OFF - No continuity
    UNLOCK 1-2 Continuity

    If continuity is not as specified, replace the switch.

    Fig 2: Inspecting Passenger's Door Lock Control Switch Continuity
    G03375566Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY 
    CONTINUITY SPECIFICATION

    Switch position Tester connection Specified condition
    LOCK 1-2 Continuity
    OFF - No continuity
    UNLOCK 1-3 Continuity

    If continuity is not as specified, replace the switch.

    Fig 3: Inspecting Door Key Lock & Unlock Switch Continuity
    G03375567Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Front door: INSPECT DOOR UNLOCK DETECTION SWITCH CONTINUITY 
    CONTINUITY SPECIFICATION

    Switch position Tester connection Specified condition
    OFF (Door Lock set to LOCK) - No continuity
    ON (Door Lock set to UNLOCK) 1 - 4 Continuity

    If continuity is not as specified, replace the switch.

    Fig 4: Inspecting Door Unlock Detection Switch Continuity
    G03375568Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Rear door: INSPECT DOOR UNLOCK DETECTION SWITCH CONTINUITY 
    CONTINUITY SPECIFICATION

    Switch position Tester connection Specified condition
    OFF (Door Lock set to LOCK) - No continuity
    ON (Door Lock set to UNLOCK) 1-4 Continuity

    If continuity is not as specified, replace the switch.

    Fig 5: Inspecting Door Unlock Detection Switch Continuity (Rear Door)
    G03375569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Back door: INSPECT DOOR UNLOCK DETECTION SWITCH CONTINUITY 
    CONTINUITY SPECIFICATION

    Switch position Tester connection Specified condition
    OFF (Door Lock set to LOCK) - No continuity
    ON (Door Lock set to UNLOCK) 1 - 4 Continuity

    If continuity is not as specified, replace the switch.

    Fig 6: Inspecting Door Unlock Detection Switch Continuity (Back Door)
    G03375570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Back door: INSPECT DOOR UNLOCK DETECTION SWITCH CIRCUIT (See  DOOR UNLOCK DETECTION SWITCH CIRCUIT  ) 
  8. Front door: INSPECT DOOR LOCK MOTOR OPERATION 
    1. Connect the battery positive (+) lead to terminal 3 and the battery negative (-) lead to terminal 2, and check that the door lock link moves to UNLOCK position.
      Fig 7: Checking That Door Lock Link Moves To Unlock Position
      G03375571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity and check that the door lock link moves to LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 8: Checking That Door Lock Link Moves To Lock Position
    G03375572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. Rear door: INSPECT DOOR LOCK MOTOR OPERATION 
    1. Connect the battery positive (+) lead to terminal 3 and the battery negative (-) lead to terminal 2, and check that the door lock link moves to UNLOCK position.
      Fig 9: Connecting Battery Positive (+) Lead To Terminal 3 & Battery Negative (-) Lead To Terminal 2
      G03375573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity and check that the door lock link moves to LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 10: Checking Door Lock Link Moves To Lock Position
    G03375574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. Back door: INSPECT DOOR LOCK MOTOR OPERATION 
    1. Connect the battery positive (+) lead to terminal 3 and the battery negative (-) lead to terminal 2, and check that the door lock link moves to UNLOCK position.
      Fig 11: Checking That Door Lock Link Moves To Unlock Position
      G03375575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity and check that the door lock link moves to LOCK position.

    If operation is not as specified, replace the door lock assembly.

  11. Backdoor: INSPECT DOOR LOCK MOTOR CIRCUIT (See  DOOR LOCK MOTOR CIRCUIT  ) 
    Fig 12: Checking That Door Lock Link Moves To Lock Position
    G03375576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. Front door: INSPECT PTC THERMISTOR OPERATION (Using an ammeter) 
    1. Connect the battery negative (-) lead to terminal 2.
    2. Connect the ammeter positive (+) lead to terminal 3 and the ammeter negative (-) lead to the battery negative (-) terminal, and check that the current changes from approximately 3.2 A to less than 0.5 A within 20 to 70 seconds.
      Fig 13: Connecting Battery Negative (-) Lead To Terminal 2
      G03375577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from terminals.
    4. Approximately 60 seconds later, connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 3, and check that the door lock moves to the LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 14: Checking That Door Lock Moves To Lock Position
    G03375578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. Rear door: 

    INSPECT PTC THERMISTOR OPERATION (Using an ammeter) 

    1. Connect the battery negative (-) lead to terminal 2.
    2. Connect the ammeter positive (+) lead to terminal 3 and the ammeter negative (-) lead to battery negative (-) terminal, and check that the current changes from approximately 3.2 A to less than 0.5 A within 20 to 70 seconds.
      Fig 15: Connecting Battery Negative (-) Lead To Terminal 2
      G03375579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from terminals.
    4. Approximately 60 seconds later, connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 3, and check that the door lock moves to the LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 16: Checking That Door Lock Moves To Lock Position
    G03375580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. Back door: 

    INSPECT PTC THERMISTOR OPERATION (Using an ammeter) 

    1. Connect the battery negative (-) lead to terminal 2.
    2. Connect the ammeter positive (+) lead to terminal 3 and the ammeter negative (-) lead to battery negative (-) terminal, and check that the current changes from approximately 3.2 A to less than 0.5 A within 20 to 70 seconds.
      Fig 17: Connecting Battery Negative (-) Lead To Terminal 2
      G03375581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from terminals.
    4. Approximately 60 seconds later, connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 3, and check that the door lock moves to the LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 18: Checking That Door Lock Moves To Lock Position
    G03375582Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. Front door: 

    INSPECT PTC THERMISTOR OPERATION (Using an ammeter with a current-measuring probe) 

    1. Connect the battery positive (+) lead to terminal 3 and the battery negative (-) lead to terminal 2.
    2. Attach a current-measuring probe to either the positive (+) lead or the negative (-) lead, and check that the current changes from approximately 3.2 A to less than 0.5 A within 20 to 70 seconds.
      Fig 19: Connecting Battery Positive (+) Lead To Terminal 3 & Battery Negative (-) Lead To Terminal 2
      G03375583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from terminals.
    4. Approximately 60 seconds later, reverse the polarity, and check that the door lock moves to the LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 20: Identifying LOCK Position
    G03375584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. Rear door: 

    INSPECT PTC THERMISTOR OPERATION (Using an ammeter with a current-measuring probe) 

    1. Connect the battery positive (+) lead to terminal 3 and the battery negative (-) lead to terminal 2.
    2. Attach a current-measuring probe to either the positive (+) lead or the negative (-) lead, and check that the current changes from approximately 3.2 A to less than 0.5 A within 20 to 70 seconds.
      Fig 21: Connecting Battery Positive (+) Lead To Terminal 3 & Battery Negative (-) Lead To Terminal 2
      G03375585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from terminals.
    4. Approximately 60 seconds later, reverse the polarity, and check that the door lock moves to the LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 22: Checking That Door Lock Moves To Lock Position
    G03375586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. Backdoor: 

    INSPECT PTC THERMISTOR OPERATION (Using an ammeter with a current-measuring probe) 

    1. Connect the battery positive (+) lead to terminal 3 and the battery negative (-) lead to terminal 2.
    2. Attach a current-measuring probe to either the positive (+) lead or the negative (-) lead, and check that the current changes from approximately 3.2 A to less than 0.5 A within 20 to 70 seconds.
      Fig 23: Connecting Battery Positive (+) Lead To Terminal 3 & Battery Negative (-) Lead To Terminal 2
      G03375587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from terminals.
    4. Approximately 60 seconds later, reverse the polarity, and check that the door lock moves to the LOCK position.

    If operation is not as specified, replace the door lock assembly.

    Fig 24: Checking That Door Lock Moves To Lock Position
    G03375588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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