Hummer 12608814 Sensor Assembly, Engine Coolant Temperature

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First of all, in this model covered, the Engine Coolant Temperature (ECT) sensor is an information sensor for components like the Powertrain Control Module (PCM) and functions as the coolant temperature sensor for the vehicle's temperature gauge. Be sure to check the coolant system.

The Engine Coolant Temperature (ECT) sensor is vital since it sends accurate information needed for the Powertrain Control Module (PCM) to operate properly and it also functions as the coolant temperature sending unit for the vehicle's temperature gauge. Make sure to inspect the cooling system.

Drain the cooling system below the ECT sensor level. Disconnect the electrical connector from the ECT sensor. Unscrew and remove the ECT sensor. If you're installing the old sensor, wrap the threads of the new ECT sensor with Teflon tape and the threads of the new sensor should already be coated with sealant. Installation is the reverse of removal. Be sure to tighten the ECT sensor to the torque specifications. Refill the cooling system.

The coolant temperature indicator system comprises a dashboard-mounted gauge and an engine-mounted sensor, which also informs the fuel and emissions systems. If overheating is indicated, check the coolant level and sensor operation. A defective sensor should be replaced. If the sensor is functional, the temperature gauge should be assessed by a dealer using a scan tool, as the onboard computer processes the data.

Before installing the ECT sensor, wrap its threads with Teflon tape.

The coolant temperature indicator usually has a warning light or a temperature gauge. In the models covered, the (ECT) also known as the Engine Coolant Temperature sensor is a crucial information sensor device for the Powertrain Control Module component and it also works as the coolant temperature sending unit on these models.

The coolant temperature system includes a dashboard warning light or gauge, and an engine coolant temperature (ECT) sensor. It also works as the coolant temperature-sending unit for the Powertrain Control Module (PCM). If overheating is indicated, check the coolant level and wiring harness connectors. When the ignition is turned to START, the light should come on, showing the bulb works. If it doesn't, the bulb may be burned out, the ignition switch faulty, or the circuit open. When turning on the engine, the light should go off; if not, the engine is overheating. If it stays on, there could be a grounded wire, a defective sending unit, or a faulty ignition switch. Also, check the coolant mix, as high water content may not activate the sending unit.

The coolant temperature indicator system in a vehicle consists of a warning light or temperature gauge on the dashboard and a coolant temperature-sending unit mounted on the engine. To replace the Engine Oil Temperature Sensor, the front of the vehicle should be raised and securely supported on jackstands. The electrical connector should be disconnected from the sensor, and then the sensor can be unscrewed from the adapter. During installation, it is important to use a new sealing washer and tighten the sensor to the specified torque.

If the coolant temperature sensor is found to be defective, it should be replaced. A faulty sensor should trigger a diagnostic trouble code (DTC) and illuminate the CHECK ENGINE light.

Drain the cooling system below the level of the sensor.

The electrical connector for 2.4L four-cylinder models is located below the exhaust manifold towards the end of the engine.

The coolant temperature indicator system consists of a temperature gauge and a coolant temperature sending unit.

The change in resistance values directly affects the voltage signal from the sensor to the PCM. As the sensor temperature increases, the resistance values decrease. Conversely, as the sensor temperature decreases, the resistance values increase.

This procedure should only be attempted after the engine has cooled completely. Some of the coolant in the engine should be let out. There is a cable that needs to be disconnected from the negative terminal of the battery. The electrical connector for the ECT sensor must also be disconnected. On all engines, the ECT sensor is located on the left cylinder head near its front side. When unscrewing it from this region, do ensure that you employ enough caution. For purposes of avoiding leakage and thread corrosion, apply Tenon tape around these threads before fitting in a new one. Get the sensor into place and tighten it to meet specific torque requirements. Now refill your cooling system.

To remove the ECT sensor, start by turning the ignition key to OFF and draining the cooling system to a level below the sensor.

For V6 models,The location of the ECT sensor is on the left end of the front cylinder head. Drain the cooling system below the level of the ECT sensor. Unplug the ECT sensor from its electrical connector. Untwist and get rid of it. Wrap Teflon tape around the threads of your new ECT to prevent leakages. Reinstallation is just a reversal of removal operation. Remember to tighten up your ECT sensor properly. After completing all these steps, you need to refill your coolant system again. V8 models: The location of the ECT sensor is on the right end of the front cylinder head just above number one spark plug hole. Drain coolants so that their level becomes lower than that of ECT sensor. Unscrew and remove from this part as well as disconnecting its electrical connector with it first. This Teflon tape wrapped around ECT's threads will help in case liquid seeps out after installation in reverse order (of removal). Do not forget about tightening this device called an ECT sensor when everything else has been done already. Refill your coolant once through with this procedure accomplished entirely.

The coolant temperature indicator system consists of a temperature gauge, warning light, and engine-mounted sensor. It monitors engine coolant temperature. The ECT sensor is crucial as it signals the PCM and BCM to operate the temperature gauge. To address overheating, check coolant level and mixture. If the gauge stays at C, inspect wiring connections. A faulty ECT sensor may trigger the Check Engine light, requiring sensor replacement or circuit repair.

If there is a problem with the ECT sensor, it is very likely that the CHECK ENGINE light will come on and the sensor will need replacing or the circuit will need repair.

After installing the sensor, you should refill the cooling system.

The coolant temperature indicator system consists of a temperature gauge or warning light on the dashboard and a coolant temperature sensor on the engine.

The coolant temperature indicator system includes a gauge or warning light on the dashboard and a sensor on the engine. The sensor serves multiple purposes, acting as an information sensor for the fuel and emissions systems and as a sending unit for the temperature gauge. If overheating, check the coolant level and make sure the wiring and fuses are intact. If the sensor is functioning properly, have the temperature gauge checked using a scan tool to access information from the PCM.

The thermistor is the Engine Coolant Temperature (ECT) sensor, which is a resistor that varies its resistance with temperature changes. The voltage signal from the sensor to the PCM will be directly influenced by variation in resistance values. During increase in sensor's temperature, the resistance values decrease while they increase during decrease in sensor's temperature. Finally, drain the cooling system to replace ECT sensor particularly on 5.3L engines where it is located at the front of driver's side cylinder head. Next disconnect electrical connector from the sensor harness and carefully remove ECT sensor out of engine body. At right rear of inline engines, there is a threaded hole for this same connection into cylinder head itself. Teflon sealing tape should be wound around these threads if new sensors do not have any sealing compound applied on them to avoid leaking. After removing it, you should reinstall it as it is and then refill the cooling system.

The coolant temperature indicator system consists of a temperature gauge on the dashboard and a coolant temperature sensor on the engine.

If the coolant temperature sensor is defective, it should be replaced with a new one.

The ECT sensor is a thermistor, a resistor that changes its resistance value based on temperature changes.

If you choose not to drain the coolant, be prepared for some coolant to leak out when removing the sensor.

The electrical connector for 3.0L and 3.6L V6 models is located at the front of the engine on the side of the engine block.

If the coolant temperature sensor is defective, it should be replaced with a new one.

It is important to check the coolant to ensure it is correctly mixed, as plain water or coolant with a high water content may have a low boiling point and fail to activate the sending unit.

After installing the sensor, you should refill the cooling system.

Turn the ignition key to OFF. Drain the cooling system. It's not necessary to fully drain the coolant, but it must be drained to a level that's below the level of the ECT sensor. Disconnect the electrical connector from the ECT sensor, which is located at the right front (passenger's side) corner of the cylinder head on 2.0L supercharged engines, near the valve cover. On 2.2L and 2.4L engines, the sensor is located in the thermostat housing, between the two heater hose pipes. On 2008 and later 2.0L turbocharged engines, the sensor is located at the left rear of the cylinder head (driver's side). You may need to unbolt the under-hood fuse and relay center, moving it aside for access. Unscrew the ECT sensor and remove it. Wrap the threads of the ECT sensor with Teflon tape. Installation is the reverse of removal. Be sure to tighten the ECT sensor to the torque specifications. Refill the cooling system when you're done.

The coolant level should be checked after the new sending unit has been installed.

The coolant temperature indicator system includes a warning light or temperature gauge on the dashboard and a coolant temperature sending unit on the engine and in some models, the Engine Coolant Temperature (ECT) sensor also functions as the coolant temperature sending unit. Also, check the coolant level and ensure that all connectors are secured, and check the coolant as it may not activate the sending unit.

Coolant temperature indicator system has a dashboard temperature gauge, warning light, and an engine mounted sensor. Engine Coolant Temperature (ECT) sensor is an information sensor for the Powertrain Control Module (PCM) transmitting a signal to the PCM that operates the temperature gauge. First, if the overheating condition occurs, check the coolant level in the system and that the coolant mixture is correct. Also, before concluding that there's a problem with your temperature indicator, look in troubleshooting section at the beginning of this book. In case, you find out that your temperature gauge still does not move from C position then check wiring harness connections going into the instrument cluster. If there is a problem with your ECT sensor then it is highly possible that you will see Check Engine light come on indicating that you need to repair sensor or circuit.

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P # 12608814 ( SENSOR ) WILL NOT COME WITHT HE MATING CONNECTOR