Engine Controls - Tests W/Codes - Non-Turbo: 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 - NON-TURBO 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, see TEST NTC-1A - NO TROUBLE CODES (NTC) TESTS or proceed to the TESTS W/O CODES article for diagnosis by symptom.