Front Door Lock: Inspection

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT DOOR UNLOCK DETECTION SWITCH

Check the continuity of the door unlock detection switch.

DOOR UNLOCK DETECTION SWITCH

Tester Connection	Switch Condition	Specified Condition
1 - 4	OFF (Door lock set to LOCK)	No continuity
1 - 4	ON (Door lock set to UNLOCK)	Continuity

Fig 1: Inspecting Door Unlock Detection Switch

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

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 the UNLOCK position.
  
  Fig 2: Checking Door Lock Link Moves To UNLOCK Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reverse the polarity and check that the door lock link moves to the LOCK position.
  If the operation is not as specified, replace the door lock assembly.
  
  Fig 3: Checking Door Lock Link Moves To LOCK Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT PTC THERMISTOR OPERATION (Using an ammeter)
1. Connect the battery negative (-) lead to terminal 2.
2. Connect the ammeter negative (-) lead to terminal 3 and the ammeter positive (+) lead to the battery positive (+) terminal, and check that the current changes from approximately 3.2 A to less than 0.5 A within 20 to 70 seconds.
  
  Fig 4: Inspecting PTC Thermistor Operation (Using Ammeter) (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the leads from the 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 the operation is not as specified, replace the door lock assembly.
  
  Fig 5: Inspecting PTC Thermistor Operation (Using Ammeter) (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 6: Inspecting PTC Thermistor Operation (Using Ammeter With Current-Measuring Probe) (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the leads from the terminals.
4. Approximately 60 seconds later, reverse the polarity, and check that the door lock moves to the LOCK position.
  If the operation is not as specified, replace the door lock assembly.
  
  Fig 7: Inspecting PTC Thermistor Operation (Using Ammeter With Current-Measuring Probe) (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002