Detection Condition
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors Engine Coolant Temperature (ECT) sensor signal at PCM 104-pin harness connector terminal No. 38. If PCM detects ECT sensor voltage of 0.14 volt or less, PCM determines ECT sensor circuit has a malfunction. This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition during first drive cycle. PENDING CODE is available if PCM detects malfunction condition. FREEZE FRAME DATA is available. DTC is stored in PCM memory.