Engine Controls - Tests W/Codes: Introduction: Notes
CAUTION:
When battery is disconnected, vehicle computer and energy systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See the COMPUTER RELEARN PROCEDURES
article in the GENERAL INFORMATION section before disconnecting battery.
Perform all steps in the BASIC TESTING article. If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) or only pass codes (system functioning properly) are found during self-diagnostics, see TEST NTC-1A - NO TROUBLE CODES (NTC) TESTS or proceed to the TESTS W/O CODES article for diagnosis by symptom.