Left Central Lock/Unlock Switch Failure
NOTE:
Perform POWER DOOR LOCK TEST 1A before proceeding with this test. For connector terminal identification and wiring diagrams, see
BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST: VER-2A after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Using scan tool, erase DTC. Using scan tool, select BODY, then BODY COMPUTER. Select SENSORS and monitor driver's door arm/disarm switch. Insert key into driver's door lock and rotate switch from lock to unlock position. If lock or switch binds in either position, repair as needed. If lock or switch does not bind, go to next step.
- Continue to slowly turn door lock and monitor scan tool voltage. If voltage displayed changes from zero to 2.4 volts to zero, system is currently operating correctly. If voltage displayed does not change from zero to 2.4 volts to zero, go to next step.
- Remove driver's door trim panel. See appropriate POWER WINDOWS article. See appropriate POWER WINDOWS article. Disconnect door key cylinder switch. Using scan tool, read driver's door arm/disarm switch voltage. If scan tool displays zero volts, replace door key cylinder switch. If scan tool does not display zero volts, go to next step.
- Disconnect Body Control Module (BCM) Gray 14-pin connector C1. BCM is mounted to junction block located behind left end cap of instrument panel. See Figure. Using external voltmeter, measure voltage between ground and terminal No. 1 (Light Green/Orange wire) on driver's door key cylinder switch harness connector. If voltage is .1 volt or less, replace BCM. If voltage is greater than .1 volt, repair Light Green/Orange wire for short to voltage.