Detection Condition

PCM monitors Engine Coolant Temperature (ECT) sensor signal at PCM 104-pin harness connector terminal No. 38 after engine is cold started. If ECT voltage reading does not reach expected temperature in a certain period, PCM determines it has taken an excessive amount of time for engine coolant temperature to reach temperature necessary to start closed-loop fuel control. This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for same malfunction has been stored in PCM. PENDING CODE is available if PCM detects malfunction condition during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in PCM memory.