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Test E, Power Locks

This test checks power door lock operation. The battery must be fully charged before beginning. Locate problem listed and go to appropriate step. Perform test ONLY if instructed by QUICK TEST  .

  1. Lubrication Of Linkage  - 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.
  2. Check Circuit Breaker  - Check power door lock circuit breaker (No. 14). If breaker is okay, go to step 3). If not, replace circuit breaker.
  3. Check Power To Module  - Turn ignition OFF. Disconnect Gray module connector. Turn ignition ON and check voltage between pin No. 13 of Gray module connector and ground while activating door lock switch. If reading is 10 volts or more, go to step 4). If reading is less than 10 volts, repair open or short in circuit 517 or charge battery. Repeat QUICK TEST.
  4. Check For Short  - Ensure entire power door lock system is connected. Connect voltmeter between pin No. 13 of Gray connector and ground. If reading is 10 volts or more when door lock/unlock switches are activated, go to step 5). If reading is less than 10 volts, check for short to ground in circuits No. 117, 118, 163 and in power door lock motor(s). Repeat QUICK TEST  .
  5. Check Module Grounds  - Using ohmmeter, check continuity between pin No. 5 of Gray module connector and ground. Also check continuity between pin No. 6 of Gray module connector and ground. If continuity exists, go to step 6). If no continuity exists, repair open in circuit No. 57 (Black wire). Repeat QUICK TEST  .
  6. Check Circuit  - Manually lock all doors. With keyless entry module disconnected, connect a jumper wire between pin No. 8 of Gray module connector and ground. Momentarily connect a second jumper wire between pins No. 3 and 14. Relock driver's door. Momentarily connect together pins No. 13 and 1. If all doors unlock, go to step 7). If only driver's door unlocks, repair circuits No. 117, 118, 163 or power door lock motor(s). Repeat QUICK TEST  .
  7. Check Switches  - Check for a power door lock switch that may be stuck in LOCK or UNLOCK positions. If stuck, replace switch(es) and repeat QUICK TEST  . If switches are okay, go to step 8).
  8. Check For Short to Ground  - Disconnect Gray module connector. Check for short to ground between pin No. 10 and ground. See Figure . Also check for short between pin No. 11 and ground. If no short is found, replace keyless entry module and repeat QUICK TEST  . If short is found, repair short to ground in circuit No. 119 (Pink/Yellow) or 120 (Pink/Light Green wires).
  9. One Or More Locks Do Not Work  - Manually cycle lock several times to check latch or linkage for binding. If mechanism is okay, go to step 10). If linkage binds, lubricate mechanism. Refer to step 1) of this test.
  10. Check Power To Actuator In LOCK  - Remove door trim panel. While pressing LOCK position of door switch, check voltage between door lock actuator in question and ground. If reading is 10 volts or more, go to step 12). If reading is less than 10 volts, go to step 11).
  11. Check Module Output  - Connect Gray module connector. Depress lock button and measure voltage between Gray module pin No. 1 and ground. Also measure voltage between Gray module pin No. 8 and ground. With lock button released, there should be zero volts at pins No. 1 and 8. If reading is 10 volts or more when button is depressed or zero volts when button is released, repair open or short in circuits No. 117, 118 or 163. If reading is less than 10 volts when button is depressed or more than 10 volts when button is released, replace keyless entry module and repeat QUICK TEST  .
  12. Check Power To Actuator In UNLOCK  - While pressing UNLOCK position of door switch, check voltage between door lock actuator circuit No. 118 and ground. See WIRING DIAGRAMS  . If reading is 10 volts or more, replace door lock actuator and repeat QUICK TEST  . If reading is less than 10 volts, repair open or short in circuits No. 118 (Pink wire) or 120 (Pink/Light Green wire) and repeat QUICK TEST  . See WIRING DIAGRAMS  .
  13. One Or More Switches Do Not Work  - Turn ignition OFF. Disconnect Gray module connector from module. Remove door trim panel at faulty switch. Check continuity between pin No. 10 of Gray module connector and Pink/Yellow wire terminal of door lock switch. Check continuity between pin No. 11 and Pink/Light Green wire terminal of door lock switch. Check continuity between ground terminal of door switch (Black wire) and ground. If continuity is present on all circuits, replace door switch. If no continuity exists on any circuit, repair open in circuits No. 57, 119 or 120. Repeat QUICK TEST  .
  14. Lock Will Only Lock Or Unlock  - With ignition OFF and Gray module connector disconnected, check circuit No. 57 (ground) to door lock switches. Check continuity between pin No. 10 (pin No. 11 if doors will not unlock) of Gray module connector and ground while pressing LOCK (UNLOCK) position of switch. If continuity exists, go to step 15). If circuit is open from pins No. 10 or 11 to ground only, go to step 16). If ground circuit is open, repair circuit No. 57 (Black ground wire) and repeat QUICK TEST  .
  15. Check Module Output  - Check voltage between pin No. 9 of Gray module connector (pin No. 3 if doors will not unlock), while pressing LOCK (UNLOCK) position of one door lock switch. If reading is 10 volts or more, repair open or short in circuit No. 117 (Orange wire) for locking problem, or 118 for unlocking problem. Repeat QUICK TEST. If reading is less than 10 volts, replace keyless entry module and repeat QUICK TEST  .
  16. Check Door Switch Function  - While pressing LOCK (UNLOCK) position of door switch, check continuity between ground and circuit No. 119 (120 for unlock) connection to door switch. Repeat QUICK TEST. If continuity exists, repair open in circuit No. 119 or 120. If no continuity exists, replace door switch. Repeat QUICK TEST  .
  17. Locks Work Intermittently  - Turn ignition OFF. Disconnect Gray module connector. Check continuity between pin No. 5 of Gray module connector and ground. Also check continuity between pin No. 6 of Gray module connector and ground. If continuity exists, check and service loose connections. Repeat QUICK TEST. If no continuity exists, repair circuit No. 57 (Black wire). Repeat QUICK TEST  .
  18. Locks Do Not Work In Freezing Weather  - Bring vehicle into heated garage to thaw out door locks. Lubricate door locks as specified in step 1) and perform QUICK TEST  to identify or locate problem(s).
  19. Locks Work Only With Engine Running  - Ensure battery is fully charged. Check condition of latches and linkage of all door locks to eliminate binding. Check and repair any corroded or loose connections at door lock actuators, switches or keyless entry module. Perform QUICK TEST  to identify or locate other problem(s).
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