Power Locks: Testing and Inspection

LOCATION

- 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.

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








- INSPECT INTEGRATION RELAY OPERATION
Door Lock Signal:

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.

- INSPECT INTEGRATION RELAY CIRCUIT
Ignition Switch