Engine Coolant Temperature (ECT) Sensor

2.6L V6, 3.2L V6, 4.3L V8, 5.0L V8, 5.5L V8 & 5.8L V12 Engines -  ECT sensor is a Negative Temperature Coefficient (NTC) sensor. Electrical resistance becomes less as temperature increases. ECT sensor has one temperature sensing circuit.

6.0L V12 Engine -  This engine uses 2 ECT sensors. ECT sensor is a Negative Temperature Coefficient (NTC) sensor. Electrical resistance becomes less as temperature increases. ECT sensor has one temperature sensing circuit. ECT sensor has a 4 pin connector. ECT sensor has 2 temperature sensing circuits. Terminals No. 1 and 4 are for ME-SFI control module, terminals No. 2 and 3 are for automatic air conditioning control module.