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 TCM supplies a 5V reference voltage to the sensor, and the output voltage of the sensor changes when the ATF temperature varies. The 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 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 ℃(176℉).
Item | Detecting Condition | Possible cause |
DTC Strategy | ● Check rationality | ● Sensor signal circuit is short to ground. ● Faulty sensor ● Faulty PCM |
Enable Conditions1) JUMP | ● -20 ℃ ≤ ATF TEMP. ≤ 120 ℃, In condition that ATF TEMP. is changed over 10 degrees during 10 sec | |
Enable Conditions2) STUCK ON HIGH TEMP | ● ATF TEMP. ≥ 30℃ and In case of ATF TEMP. is higher 15 degrees than WATER TEMP. | |
Enable Conditions3) STUCK ON LOW TEMP | ● ATF TEMP. ≤ 30 ℃ ● Ne ≥ 1000rpm ● Maintenance time : 10minutes In condition that ATF TEMP. is changed less than 5 degrees | |
Threshold Value | ||
Diagnostic Time | ||
Fail Safe | ● Learning control and Intelligent shift are inhibited. ● ATF temperature is regarded as 80℃ |
TEMP.(℉) | RESISTANCE(kΩ) | TEMP.(℉) | 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 |
