FixVault

Engine Coolant Temperature Sensor (5.7L/SRT8) Connector End View

WARNING: This page is about a different car, the 2008 Jeep Grand Cherokee, 2007 Jeep Grand Cherokee, and 2006 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
SENSOR-ENGINE COOLANT TEMPERATURE (5.7L/SRT8) - 2 WAY

GCWH680341Courtesy of DAIMLERCHRYSLER CORP.
CAV CIRCUIT FUNCTION
1 K2 16VT/OR ECT SIGNAL
2 K900 20DB/DG SENSOR GROUND