Driver Door Lock Switch Input Stuck
NOTE:
After making any repairs, perform BODY VERIFICATION TEST under VERIFICATION TESTS.
- Turn ignition on. Using scan tool, clear DTCs. Turn ignition off. Monitor DTCs on scan tool. Operate door locks from driver's door lock switch. If DRIVER DOOR LOCK SWITCH INPUT STUCK resets, go to next step. If DRIVER DOOR LOCK SWITCH INPUT STUCK does not reset, system is operating properly at this time. Check for intermittent poor connections or faulty circuits.
- Using scan tool, select SENSORS. Monitor DR DOOR LOCK SW voltage. If voltage is 1.30-3.25 volts, go to next step. If voltage is not 1.30-3.25 volts, disconnect the BCM harness connectors, check connectors and clean/repair as necessary. If okay, replace BCM. See BODY CONTROL MODULE under REMOVAL & INSTALLATION.
- Disconnect driver's door lock switch connector. See Figure. To access connector, door lock switch will need to be removed. See DOOR LOCK SWITCH under REMOVAL & INSTALLATION in POWER DOOR LOCKS & LIFTGATE RELEASE article. Using a test light connected to battery voltage, probe power door lock switch connector terminal No. 3 (Black/Dark Green wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Black/Dark Green wire between door lock switch and ground located on left "B" pillar.
- Using DVOM, measure voltage between ground and door lock switch connector terminal No. 2 (Violet/Dark Green wire). If voltage is 4.6 volts or less, repair open in Violet/Dark Green wire between door lock switch and BCM connector C3 terminal No. 21. See Figure. If voltage is greater than 4.6 volts, replace door lock switch.