Diagnostic Procedure
- Insert key in ignition switch and open driver's door. Ground wireless door lock ECU programming terminal No. 9 (Black wire). Wait for at least one second. Remove key from ignition switch and close driver's door within 10 seconds. Using a known good system transmitter, unlock driver's door. If driver's door unlocks, go to next step. If driver's door does not unlock, check input wiring. Repair or replace as necessary. If wiring is okay, check wireless door lock ECU. See PIN VOLTAGE TESTS . If found to be defective, replace wireless door lock ECU. Reprogram transmitter to new wireless door lock ECU. See TRANSMITTER PROGRAMMING . Retest system operation.
- Press any button on known good transmitter within 10 seconds. If you do not receive any feedback, check wireless door lock ECU. See PIN VOLTAGE TESTS . If found to be defective, replace wireless door lock ECU. Reprogram transmitter to new wireless door lock ECU. See TRANSMITTER PROGRAMMING . Retest system operation. If feedback received is LOCK-LOCK-LOCK-UNLOCK-TRUNK, check trunk motor feedback input line to receiver. Repair or replace as necessary. If wiring is okay, check wireless door lock ECU. See PIN VOLTAGE TESTS . If found to be defective, replace wireless door lock ECU. Reprogram transmitter to new wireless door lock ECU. See TRANSMITTER PROGRAMMING . Retest system operation.
- If feedback received is LOCK-UNLOCK-TRUNK-TRUNK, invalid vehicle access code was received. Check wireless door lock ECU. See PIN VOLTAGE TESTS . If found to be defective, replace wireless door lock ECU. Reprogram transmitter to new wireless door lock ECU. See TRANSMITTER PROGRAMMING . Retest system operation. If feedback received is LOCK-UNLOCK-TRUNK, valid vehicle access code was received. Diagnostic check is okay.