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Home >> Jaguar >> 2020 >> XF Checkered Flag >> Repair and Diagnosis >> External Pages >> Different car >> Section 117 (Electronic Engine Controls - INGENIUM I4 2.0L Petrol -- XE (X760)) >> Electronic Engine Controls - INGENIUM I4 2.0L Petrol >> Description And Operation >> Description >> Radiator Outlet Engine Cooling Temperature Sensor

Radiator Outlet Engine Cooling Temperature Sensor

WARNING: This page is about a different car, the 2018 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
G11308566

The radiator outlet Engine Cooling Temperature (ECT) sensor is located in the radiator lower hose and is sealed with an O-ring seal. The sensor is a push fit in the radiator lower hose and rotated clockwise to lock in position.

The radiator outlet ECT sensor circuit consists of a voltage divider which incorporates a temperature sensor. The temperature sensor is a Negative Temperature Coefficient (NTC) type sensor. The input to the sensor is a 5 V reference voltage supplied through a resistor within the Powertrain Control Module (PCM). The ground from the sensor is also connected to the PCM which measures the voltage across the sensor. As the engine coolant temperature rises the resistance of the sensor decreases and vice versa. The PCM calculates the coolant temperature from a map of sensor voltage against temperature.

In the event of the radiator outlet ECT sensor signal failure, the PCM applies a default value of 60°C (140°F) engine coolant temperature. On the second consecutive trip with a sensor fault, the PCM illuminates the Malfunction Indicator Lamp (MIL).

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