Mazda RX-8 2004 Service Highlights page 317

TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR FUNCTION
• The TFT sensor detects the ATF temperature in the oil pan, and sends control signals to the TCM. The TCM
controls the driving pattern selection and the torque converter clutch based on signals from the TFT sensor.
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TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR CONSTRUCTION/OPERATION
• The TFT sensor is a thermistor type and the resistance changes according to the ATF temperature.
• The characteristic of the resistance is as shown in the figure below: when the ATF temperature increases, the
resistance decreases, and when the ATF temperature decreases, the resistance increases.
• The TFT sensor is integrated with the wiring harness component.
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TURBINE SENSOR FUNCTION
• The turbine sensor is located in the transmission case with clearance between it and the reverse and high
clutch drum, and detects the rotating speed of the input shaft (turbine).
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05–13–26
AUTOMATIC TRANSMISSION
Resistance
(kilohm)
TFT SENSOR
2J
TFT SENSOR
2N
70
60
50
40
30
20
10
0
0
{32} {104}
ATF temperature (°C {°F})
CHU051319010S01
CHU0513S040
TCM
CHU0513S041
CHU051319010S02
40 80 120 150
{176}
{248} {302}
CHU0513W020
CHU051319010S03