Chrysler 5066779AA Sensor-COOLANT Temperature

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For the throttle body temperature sensor, remove the air cleaner, disconnect throttle cables, remove the accelerator cable bracket, unplug the electrical connector from the sensor, remove the sensor, apply heat transfer compound, install the sensor securely, and reverse the steps for reinstallation.

The engine coolant temperature sensor is a thermistor mounted into an engine water jacket. The change in resistance values directly affects the voltage signal from the sensor to the PCM. As the sensor temperature increases, resistance values decrease, and as the sensor temperature decreases, resistance values increase. On 2.4L four-cylinder engines, the sensor is located on the left side of the front of the cylinder head. On 3.7L V6 engines, the sensor is located on the front of the intake manifold, behind the alternator. To replace the sensor, partially drain the cooling system, disconnect the electrical connector, and unscrew the sensor. Before installing the new sensor, wrap the threads with Teflon sealing tape to prevent leakage and thread corrosion. Installation is the reverse of removal. Finally, refill the cooling system.

Start by partially draining the cooling system, then disconnect the cable from the negative battery terminal.

The temperature sending unit on 3.6L and 3.8L V6 engines is integrated into the coolant temperature sensor.

The coolant temperature indicator system includes a warning light or temperature gauge on the dash and a coolant temperature sending unit on the engine. The Engine Coolant Temperature (ECT) sensor, which also functions as the coolant temperature sending unit, provides information to the Powertrain Control Module (PCM). If an overheating indication occurs, check the coolant level and ensure all connectors in the wiring harness are tight. When the ignition switch is turned to START, the indicator light should come on, indicating a functioning bulb. If the light doesn't come on, it could be due to a burned-out bulb, faulty ignition switch, or an open circuit. Once the engine starts, the indicator light should go out and remain off unless the engine overheats. If the light doesn't go out, check for any stored trouble codes in the PCM. If the engine tends to overheat easily, check the coolant to ensure it's correctly mixed. For ECT sensor replacement.