The engine light on my 1995 Audie A90 (2.8 ltr V6) kept coming on, I took it to a Repair Shop and they diagnosed the problem as a faulty Coolant Temperature Sensor. I bought the new sensor and need to know where the old one is located in order to replace it with the new one. Could someone tell me the location of the Coolant
Temperature Sensor and any tips on how to replace it.
Thank you
It's located under the hood, driver side, upper engine area, mounted on rear of engine block behind cyl. head.
Cooling Fan Switch
Engine Temperature Sensor
Temperature Switch
Fig. Remove the coolant temperature sensor
The coolant temperature gauge sensor is a temperature-variable resistor, or thermistor. As coolant temperature increases, the resistance of the sensor decreases or decreases, depending on the type of sensor.
A1 and A2 platforms use a different type of circuit that A3 vehicles. On A1 and A2 vehicles, the circuit is a "resistance to ground" type. A3 vehicles use a "variable voltage" type, where a voltage is supplied to the sensor. Because of the circuitry design on A3 vehicles, testing of the coolant temperature gauge is limited.
The engine coolant temperature gauge uses a heat sensitive sending unit to transmit an electrical signal to the gauge. The sending unit is a heat sensitive variable resistor that is located on or near to the cylinder head and threads into an engine coolant passage. The sensors are a Negative Temperature Coefficient (NTC) type. As the temperature increases, the electrical resistance of the sensor decreases. As the coolant temperature changes, so does the resistance of the sensor. The gauge is calibrated within the operating range of the sensor and interprets the resistance value to display the coolant temperature.
Beginning with model year 1994, the engine coolant gauge and the Engine Control Module (ECM) temperature sensors were combined into one sensor with 4 terminals. The basic operation remains the same in that their resistance decreases as the coolant temperature increases, however the actual resistance values of the 2 sensor circuits are different. The electrical connector of the 4-wire terminal sensor ( 1 and 2 ) is keyed to prevent improper connection of the sensor's electrical circuit.
Fig. Beginning with model year 1994, the Engine Coolant Temperature Sensors combined the sensors for the ECM and the gauge into one sensor-1997 2.8L V6 sensor shown
Fig. The electrical connector for the combined temperature sensors is keyed to avoid improperly connecting the sensor's wiring-1997 2.8L V6 connector shown
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I need a more specific location, as there are a number of sensors in that general location, require assistance in identifying the right one... perhaps a picture would help. Also some replacement instruction as how to remove the old and install the new one.
Thanks
engine coolant temperature sensor
where is the engine coolant temperature sensor located?
where's the engine coolant temperature sensor located?
where's the engine coolant temperature located?
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