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 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 ℃(176℉).
Item | Detecting Condition | Possible cause |
DTC Strategy | ● Check voltage range | ● Open in circuit. ● Faulty sensor ● Faulty PCM/TCM |
Enable Conditions(1) | ● Engine speed > 2000rpm , ● Output speed > 1000rpm ● Accumulated time in above condition : 10 min | |
Enable Conditions(2) | Enable Conditions(1) or ● Engine speed > 700rpm , ● Engine Coolant Temperature > 35 ℃ ● Accumulated time in above condition : 60 sec | |
Threshold Value | ● voltage ＞ 4.5V | |
Diagnostic Time | ● More than 1sec | |
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 |
