The automatic transmission fluid(ATF) temperature sensor is installed in the Valve Body. This sensor uses a thermistor whose resistance changes according to the temperature changes. The TCM supplies a 5V reference voltage to the sensor, and the output voltage of the sensor changes when the ATF temperature varies. The automatic transmission fluid(ATF) temperature provides very important data for the 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 the 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 ℃, if this DTC is detected.
Item | Detecting Condition & Limp Home | Possible Cause |
DTC Strategy | ● Circuit continuity-ground | ● Line is open between ATF TEMPERATURE SENSOR signal Line[C63-2]and GND ● ATF TEMPERATURE SENSOR faulty ● TCU faulty |
Enable Conditions | ● None | |
Threshold Value | ● Voltage <0.5V | |
Diagnostic Time | ● 1sec | |
Fail Safe | ● Prohibit learning control and INTELLIGENT SHIFT till IG KEY OFF, and regard fluid temp. as 80℃ |
Temperature ℃(℉) | Resistance (㏀) | Temperature ℃(℉) | Resistance (kΩ) |
-40(-40) | 139.5 | 80(176) | 1.08 |
-20(-4) | 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 |
