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Home >> Buick >> 2002 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.1L Engine >> Diagnostic Tests >> Notes

Diagnostic Tests: Notes

NOTE: Before clearing DTCs, perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. Record FREEZE FRAME and FAILURE RECORDS for reference during testing. Data will be erased when DTCs are cleared.
NOTE: If PCM is replaced, NEW PCM must be programmed. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE  under PROGRAMMING.
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