Component Tests and General Diagnostics

INSPECTION







1. Master switch:
INSPECT DRIVER'S DOOR LOCK CONTROL SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







2. INSPECT PASSENGER'S DOOR LOCK CONTROL SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







3. Driver's door:
INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







4. Passenger's door:
INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







5. Driver's door:
INSPECT DOOR UNLOCK DETECTION SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







6. Passenger's door:
INSPECT DOOR UNLOCK DETECTION SWITCH CONTINUITY
If continuity is not as specified, replace the switch.




7. Driver's door:
INSPECT DOOR LOCK MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, and check that the door lock link moves to UNLOCK position.
b. 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.




8. Passenger's door:
INSPECT DOOR LOCK MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 6, and check that the door lock link moves to UNLOCK position.
b. 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.

9. Using an ammeter:
INSPECT DRIVER'S DOOR PTC THERMISTOR OPERATION




a. Connect the negative (-) lead from the battery to terminal 2.
b. Connect the positive (+) lead from the ammeter to terminal 1 and the 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.




c. Disconnect the leads from terminals.
d. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, and check that the door lock moves to the LOCK position.

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

10. Using an ammeter:
INSPECT PASSENGER'S DOOR PTC THERMISTOR OPERATION




a. Connect the negative (-) lead from the battery to terminal 6.
b. Connect the positive (+) lead from the ammeter to terminal 5 and the 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.




c. Disconnect the leads from terminals.
d. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 6 and the negative (-) lead to terminal 5, and check that the door lock moves to the LOCK position.

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

11. Using an ammeter with a current-measuring probe:
INSPECT DRIVER'S DOOR PTC THERMISTOR OPERATION




a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2.
b. 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.




c. Disconnect the leads from terminals.
d. 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.

12. Using an ammeter with a current-measuring probe:
INSPECT PASSENGER'S DOOR PTC THERMISTOR OPERATION




a. Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 6.
b. 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.




c. Disconnect the leads from terminals.
d. 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.

13. Door lock signal:
INSPECT INTEGRATION RELAY OPERATION

HINT: When the relay circuit is as specified, inspect the door lock signal.




a. Connect the positive (+) lead from the voltmeter to terminal A 13 and the negative (-) lead to terminal A 1.
b. Set the door lock control switch to the UNLOCK and check that the voltage increases from 0 V to battery positive voltage for approximately 0.2 seconds.




c. Reverse the polarity of the voltmeter leads.
d. Set the door lock control switch to the LOCK and check that the voltage increases from 0 V to battery positive voltage for approximately 0.2 seconds.

If operation is not as specified, replace the relay.