The input(turbine) speed sensor outputs pulse-signals according to the revolutions of the input shaft of the transmission. The PCM/TCM determines the input shaft speed by counting the frequency of the pulses. This value is mainly used to control the optimum fluid pressure during shifting.
The PCM/TCM sets this code if an output pulse-signal is not detected, from the input speed sensor, when the vehicle is running faster than 30 km/h. The Fail-Safe function will be set by the PCM/TCM if this code is detected.
Item
Detecting Condition
Possible Cause
DTC Strategy
Speed rationality check
Signal circuit is open or short.
Sensor power circuit is open
Sensor ground circuit is open
Faulty INPUT SPEED SENSOR
Faulty PCM/TCM
Enable Conditions
Battery Voltage = 10V
Output speed = 1000rpm
Engine speed(Only current gear is the 1st gear) = 3000rpm
Lever position : D,3,2,L
Threshold Value
Input speed = 0 while driving
Diagnostic Time
More than 1sec
Fail Safe
Locked into 3rd or 2nd gear.
Manual shifting is possibe(2 nd ? 3 rd ,3 rd ? 2 nd)
Input shaft & Output shaft speed sensor
Type : Hall sensor
Current consumption : 22mA(MAX)
Sensor body and sensor connector have been unified as one.
Fig 1) INPUT SIGNAL ? LOW SPEED
Fig 2) INPUT SIGNAL ? HIGH SPEED