![]() When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the ECM memory. ![]() The malfunction indicator lamp (MI) on the instrument panel lights up when the same malfunction is detected in two consecutive trips (Two trip detection logic), or when the ECM enters fail -safe mode. *: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other. The above information can be checked using procedures listed in the table below. The ECM also records various emission-related diagnostic information including: The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua- tors.
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