Test Procedures
- Use spray lubricant to completely lubricate latch. If necessary, remove inner trim panel to completely spray linkage. Cycle lock 10 times or more, and check for interference.
- Check the following items in the lock system:
- Circuit breaker 14.
- 10 volts at Green connector pin 13, even while locks are operated.
- Continuity to ground at Green connector pins 5 and 6.
- Correct mechanical operation of door lock switches.
- Short to ground at Green connector pins 10 and 11.
- 10 volts or more at pin 13 with lock switches activated.
- Check continuity between pins 8 and 3 and 8 and 1. If any problems are located, correct and retest.
- Manually cycle lock several times to check operation. Remove door trim and check voltage at actuator while locking and unlocking door. If more than 10 volts, replace actuator. If less than 10 volts, go to module and insert voltmeter probes into back of Green connector at pin 8 and ground, then pin 1 and ground while pressing lock button. Voltage should be 0 when button is not depressed; 10 or more with button depressed. If not, replace module and retest. Check for 10 volts or more between lock actuator circuit 118 and ground while pressing Unlock position of door switch. If 10 volts or more, service actuator. If less than 10 volts, service circuit 118 or 120.
- Turn ignition off, remove door trim panel at bad switch and disconnect Green connector at module. Check for continuity between Green connector pin 10 and Lock terminal of door switch. Check between pin 11 and Unlock terminal. Finally, check continuity between ground and ground terminal of lock switch. If all circuits have continuity, replace lock switch. If not, repair circuits.
- With ignition off, disconnect Green connector. Check continuity to ground from pins 10 and 11 when pressing Lock (pin 10) and Unlock (pin 11) at one of the door switches. Then check for voltage at pins 8 and 3 while pressing Lock (pin 8) and Unlock (pin 3). If no continuity to ground, repair circuits. If less than 10 volts are measured, replace module. If more than 10 volts, repair wiring to door.
- Check continuity of module ground connections. Measure between ground and pins 5 and 6 of Green connector. If resistance is measured, clean or repair ground connections.
- Bring vehicle into heated garage to thaw locks, then lubricate locks as in step 1). Perform Quick Test.
- Check battery condition and linkage of all locks to eliminate binding. Repair any corroded or loose connections. If system is not fully operative, perform Quick Test.