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 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 higher than a value generated by thermistor resistance, in a normal operating range, for an extended period of time . The TCM regards the ATF temperature as fixed at a value of 80 ℃.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check rationality | ● Sensor signal circuit is short to ground. ● Faulty sensor ● Faulty PCM |
Enable Conditions1)JUMP | ● -4 ℉ ≤ OIL TEMP ≤ 248 ℉, In condition that Oil TEMP is changed over 10 degrees during 10 sec | |
Enable Conditions2)STUCK ON HIGH TEMP | ● OIL TEMP ≥ 86℉ and In case of OIL TEMP is higher 15 degrees than WATER TEMP | |
Enable Conditions3)STUCK ON LOW TEMP | ● OIL TEMP ≤ 86 ℉ ● Ne ≥ 1000rpm ● Maintenance time : 10minutes In condition that OIL TEMP is changed less than 5 degrees | |
Threshold Value | ||
Diagnostic Time | ||
Fail Safe | ● Learning control and Intelligent shift are inhibited. ● Fluid temperature is regarded 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 |
