All Doors Fail To Lock/Unlock From Any Switch
NOTE:
Perform POWER DOOR LOCK TEST 2A 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.
- Remove driver's door trim panel. See appropriate POWER WINDOWS article. Disconnect door lock switch connector. Using scan tool, read door lock switch voltage. If scan tool displays voltage greater than .2 volts, go to next step. If scan tool displays voltage than .2 volts or less, replace driver's door lock switch.
- Remove right front door trim panel. Disconnect door lock switch connector. Using scan tool, read door lock switch voltage. If scan tool displays voltage greater than .2 volts, go to next step. If scan tool displays voltage than .2 volts or less, replace right front door lock switch.
- Turn ignition off. Disconnect Body Control Module (BCM) Blue 16-pin connector C4. Using external voltmeter, measure voltage between ground and terminal No. 5 (White/Dark Green wire) on Blue connector. If voltage is .2 volts or less, go to next step. If voltage is more than .2 volts, repair White/Dark Green wire for short to voltage.
- Measure voltage between ground and terminal No. 12 (White/Light Green wire) on Blue connector. If voltage is .2 volts or less, replace BCM. If voltage is more than .2 volts, repair White/Light Green wire for short to voltage.