Test At: Trunk Open Message Always On
- If body rear end diagnostic system check was performed, go to next step. If body rear end diagnostic system check was not performed, see BODY REAR END DIAGNOSTIC CHECK under DIAGNOSTIC CHECKS in BODY CONTROL MODULES - DEVILLE article.
- Turn ignition off. Connect scan tool to Data Link Connector (DLC). See Figure. Close trunk lid. Using scan tool, select REAR INTEGRATION MODULE (RIM) data list. Observe TRUNK AJAR SWITCH parameter. If TRUNK AJAR SWITCH parameter is not OFF, go to next step. If TRUNK AJAR SWITCH parameter is OFF, problem is intermittent, check wiring and connections.
- Turn ignition off. Disconnect trunk lid release actuator connector. See COMPONENT LOCATIONS . Turn ignition on. Observe TRUNK AJAR SWITCH parameter. If TRUNK AJAR SWITCH parameter is not OFF, go to next step. If TRUNK AJAR SWITCH parameters OFF, go to step 6.
- Check for short to ground in Red/Black wire between trunk lid release actuator harness connector terminal "C" and RIM connector C1 terminal B3. See Figure and Fig 1
. If no problems are found, go to next step. If any problems are found and corrected, go to step 9.
- Check for poor connections at RIM connectors. If no problems are found, go to step 7. If any problems are found and corrected, go to step 9.
- Check for poor connections at trunk lid release actuator connector. If no problems are found, go to step 8. If any problems are found and corrected, go to step 9.
- Replace RIM. See REAR INTEGRATION MODULE under REMOVAL & INSTALLATION in BODY CONTROL MODULES - DEVILLE article. After repairs, go to step 9.
- Replace trunk lid release actuator. See REAR COMPARTMENT LID RELEASE SOLENOID under REMOVAL & INSTALLATION in POWER TRUNK & FUEL DOOR RELEASE - DEVILLE article.
- After repairs, recheck operation of TRUNK OPEN message. If TRUNK OPEN message operates properly, repair is complete. If TRUNK OPEN message does not operate properly, return to step 2.
Courtesy of GENERAL MOTORS CORP.