Oil Temperature Sensor Explanation

OIL TEMPERATURE SENSOR DESCRIPTION
The oil temperature sensor (Fig 1) #1 is located on the oil filter housing. The oil temperature sensor is a two wire sensor with a tapered threaded sensor probe. The sensor probe is mounted to the oil filter housing through an access hole. A thread lock patch seals the oil temperature sensor to the oil filter housing.

OIL TEMPERATURE SENSOR OPERATION
The oil temperature sensor (Fig 2) is a variable resistor that measures the temperature of the engine oil. The Powertrain Control Module (PCM) supplies a 5 volt reference and a ground to the sensors low reference signal circuit. When the oil temperature is low, the sensor resistance is high. When the oil temperature is high, the sensor resistance is low.

OIL TEMPERATURE SENSOR REMOVAL
1. Release fuel system pressure. Refer to FUEL SYSTEM PRESSURE RELEASE
2. Remove the upper intake manifold and lower intake manifold. Refer to MANIFOLD, INTAKE, REMOVAL
3. Disconnect the oil temperature sensor wire harness connector (Fig 3) #2.
4. Remove the oil temperature sensor (Fig 3) #1 from the oil filter housing.

OIL TEMPERATURE SENSOR INSTALLATION
1. Install the oil temperature sensor (Fig 3) #1 and tighten to the proper specification. Refer to TORQUE SPECIFICATIONS
2. Connect the oil temperature sensor wire harness connector (Fig 3) #2.
3. Install the upper and lower intake manifolds. Refer to MANIFOLD, INTAKE, INSTALLATION