What is a transmission temperature sensor?
A (TFT) transmission fluid temperature sensor is one of several sensors providing input to the (TCM) transmission control module. It’s located in the valve body or oil pan of the transmission or transaxle. The TCM uses this sensor to monitor the temperature of the transmission fluid.
Where is the temperature sensor located in a transaxle?
It’s located in the valve body or oil pan of the transmission or transaxle. The TCM uses this sensor to monitor the temperature of the transmission fluid.
How does the temperature of the fluid affect the transmission?
It means that the sensor’s resistance decreases as the fluid’s temperature increases. The TCM uses this input along with other sensor inputs to control transmission operations. When the fluid temperature is cold, the TCM delays (TCC) torque converter clutch engagement until the fluid reaches a specific temperature.
How does the TFT sensor in a TCM work?
The TCM uses this sensor to monitor the temperature of the transmission fluid. Thermistors like the TFT change resistance as temperature changes. We know with ohms law that as resistance changes, the voltage signal changes as well.
Where is the transmission fluid temperature sensor located?
Although generic, the exact repair steps may vary depending on make/model. The transmission fluid temperature sensor (TFT) sensor produces a signal that is used by the powertrain control module (PCM) to determine shift points, line pressure and torque converter clutch (TCC) control. The sensor is often located in the transmission oil pan.
What are the OBD codes for a fluid temp sensor?
Related trans fluid temperature sensor “A” circuit codes: P0710 Transmission Fluid Temperature Sensor A Circuit Malfunction P0712 Transmission Fluid Temperature Sensor A Circuit Low Input P0713 Transmission Fluid Temperature Sensor A Circuit High Input P0714 Transmission Fluid Temperature Sensor A Circuit Intermittent
When does the TFT sensor signal go down?
This means internal resistance of the sensor is inversely proportional to the oil temperature. The TFT sensor signal voltage goes down when the transmission fluid temperature goes up and vice versa. Code P0711 is set when the PCM detects a performance problem with the transmission fluid temperature sensor.
What happens to a TFT sensor when oil temperature goes up?
TFT sensors are a type of negative temperature coefficient (NTC) thermistor. This means internal resistance of the sensor is inversely proportional to the oil temperature. The TFT sensor signal voltage goes down when the transmission fluid temperature goes up and vice versa.
How does the temperature of the transmission fluid affect the TCM?
The TCM uses this sensor to monitor the temperature of the transmission fluid. Thermistors like the TFT change resistance as temperature changes. We know with ohms law that as resistance changes, the voltage signal changes as well. By increasing resistance, we lower the voltage signal sent to the TCM.
A (TFT) transmission fluid temperature sensor is one of several sensors providing input to the (TCM) transmission control module. It’s located in the valve body or oil pan of the transmission or transaxle. The TCM uses this sensor to monitor the temperature of the transmission fluid.
When does the Trans temp sensor go off?
Once trans is up to normal temperatures (few minutes of driving), it shoots down to off location at 0 and check gauge comes on and tow/haul flashes. I am correct to assume the sensor is gone bad right?
It’s located in the valve body or oil pan of the transmission or transaxle. The TCM uses this sensor to monitor the temperature of the transmission fluid.