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Powertrain Control Module Diagnostic System Check

CAUTION: DO NOT perform diagnostic system check if there is not a driveability concern, unless another procedure directs you to this diagnostic procedure. Check for applicable Technical Service Bulletins (TSBs) before proceeding. Unless a diagnostic procedure instructs you, DO NOT clear DTCs. Ensure battery is fully charged before proceeding.
  1. Connect scan tool to Data Link Connector (DLC). DLC is located below left side of instrument panel, to right of steering column. If scan tool powers up, go to next step. If scan tool does not power up, go to TEST A: SCAN TOOL DOES NOT POWER UP  under SYSTEM TESTS.
  2. Turn ignition on, engine off. Using scan tool, attempt to communicate with Vehicle Theft Deterrent (VTD), Electronic Brake Control Module (EBCM), Instrument Panel Cluster (IPC), Heater, Ventilation , Air Conditioning (HVAC) and Powertrain Control Module (PCM). If scan tool communicates with VTD, EBCM, IPC, HVAC and PCM, go to next step. If scan tool does not communicate with VTD, EBCM, IPC, HVAC and PCM, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  3. Attempt to start and idle engine. If engine starts and idles, go to next step. If engine does not start and idle, repair starting and idling concern. See appropriate TROUBLE SHOOTING - NO CODES article in ENGINE PERFORMANCE.
  4. Using scan tool, select DISPLAY DTCS function on scan tool for VTD, EBCM, IPC, HVAC and PCM. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, go to step  9 .
  5. Using scan tool, select CAPTURED INFO, in order to store PCM DTC information. Go to next step.
  6. If scan tool does not display any DTCs which begin with a "U", go to next step. If scan tool displays any DTCs which begin with a "U", go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  7. If scan tool does not display DTCs P0601-P0607, P1600, P1621, P1627 or P1683, go to next step. If scan tool displays these DTCs, perform appropriate test procedure. See SELF-DIAGNOSTICS - CORVETTE 5.7L article in ENGINE PERFORMANCE.
  8. If scan tool does not display DTCs P0562, P0563, P1637 or P1638, repair problems by symptom. See GENERATORS & REGULATORS - CORVETTE article in STARTING & CHARGING SYSTEMS. If scan tool displays DTCs P0562, P0563, P1637 or P1638, see GENERATORS & REGULATORS - CORVETTE article in STARTING & CHARGING SYSTEMS.
  9. If concern is not automatic transmission related, go to next step. If concern is automatic transmission related, perform appropriate diagnostic system check. See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
  10. If concern is not with Inspection and Maintenance (I/M) testing, go to next step. If concern is with I/M testing, perform inspection and maintenance system check. See SELF-DIAGNOSTICS - CORVETTE 5.7L article in ENGINE PERFORMANCE.
  11. Inspect for driveability symptoms, such as hard to start, surges, lack of power, etc. If driveability symptom is identified, perform appropriate test. See appropriate TROUBLE SHOOTING - NO CODES article in ENGINE PERFORMANCE.
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