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Trunk/Tonneau Ajar Message Inoperative (Convertible & Hardtop)

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 ANTI-THEFT SYSTEMS - 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 trunk lid or folding top cover and turn ignition on. If TRUNK AJAR or TONNEAU AJAR message is displayed on DIC, go to next step. If TRUNK AJAR or TONNEAU 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 or folding top ajar switch is OPEN, go to next step. If scan tool does not indicate hatch/trunk ajar or folding top ajar switch is OPEN, go to step  13 .
  4. Monitor DIC messages. Disconnect suspect ajar switch connector located on each latch assembly. If TRUNK AJAR or TONNEAU AJAR message is displayed on DIC, go to next step. If TRUNK AJAR or TONNEAU AJAR message is not displayed on DIC, go to step  8 .
  5. Check for short to ground in Red/Black wire between hatch/trunk ajar switch and BCM (convertible and hardtop). Check for short to ground in Dark Blue wire between folding top ajar switch and BCM (convertible). 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 trunk lid or folding top cover. If scan tool indicates hatch/trunk ajar or folding top ajar switch is OPEN, go to next step. If scan tool does not indicate hatch/trunk ajar or folding top ajar switch is OPEN, go to step  13 .
  7. Disconnect suspect ajar switch connector located on each latch assembly. Monitor DIC message. Connect a fused jumper wire between terminals of each latch ajar switch connector. If TRUNK AJAR or TONNEAU AJAR message is displayed on DIC, go to next step. If TRUNK AJAR or TONNEAU AJAR message is not displayed on DIC, go to step  9 .
  8. Replace inoperative latch assembly. See REMOVAL & INSTALLATION in POWER HATCH & FUEL DOOR RELEASE - CORVETTE article. After repairs, go to step  14 .
  9. Monitor DIC message. For trunk lid, connect a fused jumper wire between ground and latch ajar switch connector terminal "B" (Red/Black wire). For folding top cover, connect a fused jumper wire between ground and latch ajar switch connector terminal "B" (Dark Blue wire). If TRUNK AJAR or TONNEAU AJAR message is displayed on DIC, go to next step. If TRUNK AJAR or TONNEAU 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/trunk ajar switch and BCM (convertible and hardtop). Check for open or high resistance in Dark Blue wire between folding top ajar switch and BCM (convertible). 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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