Diagnostic Aids

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Do not clear the diagnostic trouble code (DTC) unless directed by a diagnostic procedure. Clearing the DTC will erase all Freeze Frame and Failure Records stored in the powertrain control module (PCM) memory.

Use a scan tool that is known to function correctly. If necessary, test the scan tool on another vehicle.
Ensure the scan tool contains the most current file available.
The scan tool will display a loss of communication error message under the following conditions:
- PCM power is interrupted
- The ignition switch is turned OFF
- The battery voltage level is very low
- A poor connection at the diagnostic link connector (DLC)