The automatic transmission fluid(ATF) temperature sensor A is installed in the Transmission Range Switch and fluid(ATF) temperature sensor B is installed in the valve body. The TCM supplies a 5V reference voltage to the sensor, and the output voltage of the sensor changes when the ATF temperature varies.
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 | |
Case 1 | DTC Strategy |
•
Rationality(Low stuck error) | ※ ATF T/S :Automatic Transmission Fluid Temperature Sensor
•
OPEN OR SHORT IN CIRCUIT
•
Faulty ATF T/S 1
•
TCM |
Enable Conditions |
•
Output speed > 400 RPM
•
Engine speed > 600 RPM
•
Throttle opening > 3%
•
Oil temperature < 20 ℃ | ||
Threshold Value |
•
Oil temperature (Present Oil Temp.-Oil Temp. when the time starts)<2'C within 500 sec | ||
Case 2 | DTC Strategy |
•
Rationality(High stuck error) | |
Enable Conditions |
•
Oil Temperature. at IG on > 18℃
•
Coolant Temp at IG off - Coolant Temp. at IG on >= 50℃
•
Soaking Time from ECU > 15000[sec]
•
Time elasped after engine coolant increase 50℃ 500 sec | ||
Threshold Value |
•
Oil temperature Oil Temp. at IG on - Coolant Temp. at IG on > 10℃ | ||
Case 3 | DTC Strategy |
•
Rationality(Cold stuck error) | |
Enable Conditions |
•
Input speed or Engine speed > 600 RPM
•
Position Lever D, B, L
•
Oil Temperature at IG on < -10℃ | ||
Threshold Value |
•
Oil temperature Accumulated time to reach target temperature after start. * Table.1 | ||
Diagnostic Time |
•
More than 2sec. | ||
Fail Safe |
•
Fluid temperature is regarded as 80℃ | ||
Temperature(℃) | Resistance(KΩ) | Voltage(V) | |
ATF T/S 1 | 0℃ | Approx. 15KΩ | Approx. 3.3V |
20℃ | Approx. 6.5KΩ | Approx. 2.7V | |
80℃ | Approx. 0.9KΩ | Approx. 0.9V | |
ATF T/S 2 | 0℃ | Approx. 10.5KΩ | Approx. 3.3V |
20℃ | Approx. 4.3KΩ | Approx. 2.5V | |
80℃ | Approx. 0.5KΩ | Approx. 0.7V |
