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Positive Temperature Coefficient (PTC) Thermistor Operation: Camry

  1. Locate front or rear door lock motor in door. Disconnect door lock motor 4-pin connector. Connect positive battery lead to Blue/Black wire terminal of door lock motor. Connect ammeter positive lead to Blue/Red wire terminal of door lock motor. Connect ammeter negative lead to negative battery terminal. Ensure current changes from 3.2 amps to less than 0.5 amp within 20-70 seconds. If current changes as specified, go to next step. If current does not change as specified, replace door lock assembly.
  2. Disconnect test leads from terminals and wait at least 60 seconds. Connect positive battery lead to Blue/Red wire terminal of door lock motor. Connect negative lead battery to Blue/Black wire terminal of door lock motor. Ensure door lock link moves to LOCK position. If operation is not as specified, replace door lock assembly and retest system.
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