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Temperature Sensor

Fig 1: Identifying Temperature Sensor
GLL101518Courtesy of VOLVO CARS CORPORATION

The temperature sensor is the NTC resistive type. The temperature sensor is positioned on the valve housing inside the side cover and measures the transmission fluid temperature in the oil pan. The temperature sensor is supplied with 5 V and is grounded via the transmission control module (TCM). The control module can determine the transmission fluid temperature by measuring the voltage drop across the NTC resistor of the sensor. The control module stores the time the temperature has been within a certain temperature range. If a certain temperature and time has been exceeded, a diagnostic trouble code (DTC) indicating that a oil change is necessary is stored.

There are diagnostics for the temperature sensor.

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