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Rear Hatch Ajar Message Inoperative (Coupe)

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit identification, see WIRING DIAGRAMS in POWER HATCH & FUEL DOOR RELEASE - CORVETTE article.
  1. If Body Control Module (BCM) diagnostic system check has been performed, go to next step. If BCM diagnostic system check has not been performed, see BODY CONTROL MODULE DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in BODY CONTROL MODULES - CORVETTE article.
  2. Close rear hatch and turn ignition on. If HATCH AJAR message is displayed on DIC, go to next step. If HATCH AJAR message is not displayed on DIC, go to step  6 .
  3. Connect scan tool to DLC and display BCM input data 2 list. If scan tool indicates hatch/trunk ajar switch is OPEN, go to next step. If scan tool does not indicate hatch/trunk ajar switch is OPEN, go to step  13 .
  4. Disconnect hatch ajar switch connectors located on each hatch latch assembly. If HATCH AJAR message is displayed on DIC, go to next step. If HATCH AJAR message is not displayed on DIC, go to step  8 .
  5. Check for short to ground in Red/Black wire between hatch latch ajar switch and BCM. If faulty circuit is found and repaired, go to step  14 . If circuit is okay, go to step  12 .
  6. Connect scan tool to DLC and display BCM input data 2 list. Open rear hatch. If scan tool indicates hatch/trunk ajar switch is OPEN, go to next step. If scan tool does not indicate hatch/trunk ajar switch is OPEN, go to step  13 .
  7. Disconnect hatch ajar switch connectors located on each hatch latch assembly. Monitor DIC message. Connect a fused jumper wire between terminals of each hatch latch ajar switch connector. If HATCH AJAR message is displayed on DIC, go to next step. If HATCH AJAR message is not displayed on DIC, go to step  9 .
  8. Check that hatch latches open and close properly and are aligned correctly. Adjust as necessary. If latches are adjusted okay, replace suspect hatch latch assembly. See POWER HATCH & FUEL DOOR RELEASE - CORVETTE article. After repairs, go to step  14 .
  9. Monitor DIC message. Connect a fused jumper wire between ground and hatch latch ajar switch connector terminal "B" (Red/Black wire) at each latch. If HATCH AJAR message is displayed on DIC, go to next step. If HATCH AJAR message is not displayed on DIC, go to step  11 .
  10. Repair open or high resistance in Black wire between suspect hatch latch and Splice Pack SP302 (ground). SP302 is located on the right "B" pillar. After repairs, go to step  14 .
  11. Check for open or high resistance in Red/Black wire between hatch latch ajar switch and BCM. If faulty circuit is found and repaired, go to step  14 . If circuit is okay, go to next step.
  12. Replace Body Control Module (BCM). See BODY CONTROL MODULE (BCM)  under REMOVAL & INSTALLATION. After repairs, go to step  14 .
  13. Replace IPC. See INSTRUMENT PANEL CLUSTER (IPC)  under REMOVAL & INSTALLATION. After repairs, go to next step.
  14. Recheck system operation. If symptom is still present, go to BODY CONTROL MODULE DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in BODY CONTROL MODULES - CORVETTE article.
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