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ENGINE DRIVEABILITY AND EMISSIONS 6E–105 ECM DIAGNOSTIC TROUBLE CODES (DTC) Type A • Emission related. • Requests illumination of the MIL (Malfunction Indicator Lamp = Check Engine Lamp) of the first trip with a fail. • Stores a history DTC on the first trip. • Stores a freeze frame (If empty). • Stores a fail record. • Updates the fail record each time the diagnostic test fails. Type B • Emission related. • “Armed” after one trip with fail. • “Disarmed” after one trip with a pass. • Requests illumination of the MIL on the second consecutive trip with a fail. • Store a history DTC on the second consecutive trip with a fail. (The DTC will be armed after the first fail.) • Stores a freeze frame on the second consecutive trip with a fail (If empty). • Stores a fail record when the first test fails (not dependent on consecutive trip). • Updates the fail record each time the diagnostic test fails. Type D • Non emission related. • Does not request illumination of any lamp. • Stores a history DTC on the first trip. • Does not store a freeze frame. • Stores fail record when test fails. • Updates the fail record each time the diagnostic test fails. |