Convertible Folding Top Module Troubleshooting (XLR 03–09 / Corvette 05–13)

Important: Use this guide if you reinstalled your repaired Folding Top Control Module and the problem is still happening. Please do not open/disassemble the module. Vehicle-side checks only.

• Step 1 — Confirm top “enable” conditions
  • Battery voltage is healthy (low voltage can stop top operation)
  • Vehicle in PARK, parking brake applied
  • Trunk partition/divider is in the correct position (if equipped)
  • Windows/latches operate normally (some systems require these inputs)
• Step 2 — Scan for codes and verify communication
  • Scan all modules and record B-codes + U-codes
  • If you have U0100/U0101 (no communication), go to Step 3
  • If you have B1014/B1015/B1016 (top function faults), go to Step 4
• Step 3 — If “No Communication” (U0100/U0101)
  • Check related fuses (top/module/BCM) and any top-related relays
  • Verify power + ground at the module connector (load-test grounds if possible)
  • Inspect connectors for corrosion, pushed pins, loose fit, or water intrusion
  • Quick CAN sanity check (key off): network resistance should be ~60Ω at the DLC if the network is healthy
• Step 4 — If module communicates but top is inop (B1014/B1015/B1016)
  • Check top pump power/ground and pump connector condition
  • Check top/latch/decklid/tonneau position switches and connectors (a bad input can block operation)
  • Check for binding/mechanical obstruction and verify hydraulic fluid level/condition (if applicable)
• Step 5 — Final verification
  • Clear codes, cycle key, and retry top operation
  • If the same code returns immediately, focus on the related circuit/switch/hydraulic component

    Need help? Call or email us with your VIN, any stored codes, and what the top is (or isn’t) doing.