The automatic TRANSAXLE fluid(ATF) temperature sensor is installed in the Valve Body. This sensor uses a thermistor whose resistance changes according to the temperature changes. The PCM/TCM supplies a 5V reference voltage to the sensor, and the output voltage of the sensor changes when the ATF temperature varies. The automatic TRANSAXLE fluid(ATF) temperature provides very important data for the PCM/TCM’s control of the Torque Converter Clutch, and is also used for many other purposes.
This DTC code is set when the ATF temperature output voltage is lower than a value generated by thermistor resistance, in a normal operating range, for approximately 1 second or longer. The TCM regards the ATF temperature as fixed at a value of 80 ℃.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check for ground short | ● Sensor signal circuit is short to ground. ● Faulty sensor ● Faulty PCM |
Enable Conditions | ● Continuous | |
Threshold Value | ● Voltage <0.49V | |
Diagnostic Time | ● More than 1sec | |
Fail Safe | ● Learning control and Intelligent shift are inhibited. ● Fluid temperature is regarded as 80℃(176℉). |
TEMP.(℉) | RESISTANCE(kΩ) | TEMP.(℉) | RESISTANCE(kΩ) |
-40(-40) | 139.5 | 80(176) | 1.08 |
-4(-20) | 47.7 | 100(212) | 0.63 |
0(32) | 18.6 | 120(248) | 0.38 |
20(68) | 8.1 | 140(284) | 0.25 |
40(104) | 3.8 | 160(320) | 0.16 |
60(140) | 1.98 | ||
