1998 Chevrolet Corvette 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE

BCM Diagnostic System Check: Testing

  1. Turn ignition off. Connect scan tool. Turn ignition on. Attempt to establish communication with BCM. If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, go to step 3).
  2. Using scan tool, check for BCM DTCs. If any DTC exists, go to appropriate DTC test. If no DTCs exist, system is operating properly.
  3. Attempt to establish communication with other systems connected to same serial data line (PCM, RFA, IPC, etc.). If scan tool communicates with other systems, go to next step. If scan tool does not communicate with other systems, go to SCAN TOOL DOES NOT COMMUNICATE WITH SERIAL DATA LINE  .
  4. Ensure ignition is on. Using a test light connected to ground, probe each BCM fuse. See WIRING DIAGRAMS  . If test light illuminates at all circuits, go to next step. If test light does not illuminate at all circuits, go to step 9).
  5. Turn ignition off. Disconnect BCM 24-pin connector C1, 32-pin connector C2 and 16-pin connector C3. Turn ignition on. Using a test light connected to ground, probe each BCM power circuit. See WIRING DIAGRAMS  . If test light illuminates at all circuits, go to next step. If test light does not illuminate at all circuits, go to step 11).
  6. Using a test light connected to battery, probe each BCM ground circuit. See WIRING DIAGRAMS  . If test light illuminates at all circuits, go to next step. If test light does not illuminate at all circuits, go to step 12).
  7. Using DVOM, check for continuity between BCM harness connector C1, terminal B6 (Light Green wire) and Data Link Connector (DLC) terminal No. 2 (Purple wire). If continuity exists, go to next step. If continuity does not exist, go to step 10).
  8. Replace BCM. See REMOVAL & INSTALLATION  . Reprogram BCM. See BCM PROGRAMMING/RPO CONFIGURATION  . Go to step 13).
  9. Repair open in ignition or battery feed to BCM fuse. If any fuse is open, locate and repair short in associated circuit. See WIRING DIAGRAMS  . Go to step 13).
  10. Locate and repair open in Light Green or Purple wire between BCM connector C1 and DLC. Go to step 13).
  11. Locate and repair open in BCM power circuit. Go to step 13).
  12. Locate and repair open in BCM ground circuit. Go to next step.
  13. Turn ignition off. Reinstall all components or connectors. Clear DTCs. Ensure system is operating properly.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.