Diagnostic Procedures
- If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK under DIAGNOSTIC SYSTEM CHECKS. After performing powertrain diagnostic system check, go to next step.
- Program PCM. See POWERTRAIN CONTROL MODULE PROGRAMMING under PROGRAMMING. Recheck for DTC P0602. If DTC resets, go to next step. If DTC does not reset, system is okay at this time.
- Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After replacing PCM, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK under DIAGNOSTIC SYSTEM CHECKS.