All Doors Fails To Lock & Unlock From Any Switch
NOTE:
For connector terminal identification and wiring diagrams, see
BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST VER-1A
after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Using scan tool, select BODY SYSTEM, then BODY COMPUTER. Scan tool will perform a CCD bus test. If scan tool displays BUS FAILED or NO RESPONSE, see appropriate VEHICLE COMMUNICATIONS article. If scan tool does not display BUS FAILED or NO RESPONSE, go to next step.
- Using scan tool, select SENSOR DISPLAY and read IGNITION VOLTAGE. If scan tool displays less than 10 volts, see appropriate VEHICLE COMMUNICATIONS article. If scan tool displays 10 volts or more, go to next step.
- Using scan tool, select READ DTCs. If any Diagnostic Trouble Codes (DTC) are present, go to appropriate DTC under POWER DOOR LOCK SYSTEM . If no power door lock codes are present, go to next step
- Lower front door windows. Remove key from ignition. Close all doors. Lock and unlock doors from all switches and observe door locks. If all locks operate properly, system is currently functioning correctly. If all locks do not operate properly, see POWER DOOR LOCK SYSTEM under SYMPTOM IDENTIFICATION and proceed to appropriate test.