Component Tests and General Diagnostics

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







2. Master switch: INSPECT DRIVER'S DOOR LOCK CONTROL SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.







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







4. INSPECT PASSENGER'S DOOR LOCK CONTROL SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.







5. INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







6. INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.







7. INSPECT DOOR UNLOCK DETECTION SWITCH CONTINUITY
If continuity is not as specified, replace the switch.




8. INSPECT MOTOR OPERATION
a. Connect the positive (+) lead from the battery to terminal 3 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.

9. INSPECT PTC THERMISTOR OPERATION (Using an ammeter)




a. Connect the positive (+) lead from the battery to terminal 3.
b. Connect the positive (+) lead from the ammeter to terminal 2 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 3, and check that the door lock moves to the LOCK position.
If operation is not as specified, replace the door lock assembly.

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




a. Connect the positive (+) lead from the battery to terminal 3 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.







11. INSPECT DOOR LOCK ASSEMBLY CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.

12. 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 A12 and the negative (-) lead to terminal A25.
b. Set the door lock control switch to UNLOCK and check that the voltage rises 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 LOCK and check that the voltage rises from 0 V to battery positive voltage for approximately 0.2 seconds.
If operation is not as specified, replace the relay.

13. INSPECT INTEGRATION RELAY CIRCUIT