The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the 1st gear ratio, while the transaxle is engaged in the 1st gear. For example, if the output speed is 1000 rpm and the 1st gear ratio is 3.73, then the input speed is 3730 rpm.
This code is set if the value of input shaft speed is not equal to the value of the output shaft, when multiplied by the 1st gear ratio, while the transaxle is engaged in 1st gear. This malfunction is mainly caused by mechanical troubles such as control valve sticking or solenoid valve malfuctioning rather than an electrical issue.
Item
Detecting Condition
Possible Cause
DTC Strategy
Incorrect 1st gear ration
Faulty Input Speed Sensor
Faulty Output Speed Sensor
Faulty internal parts in transmission
Enable Conditions
Engine RPM >600rpm
150rpm < Output Speed < 6000rpm
Shift lever position = "D"
Input Speed Sensor RPM > 600rpm
ATF temperature = -10?
Throttle Valve > 15%
Time after last shifting > 1sec
Threshold Value
Input speed RPM /1st gear ration- Output speed sensor RPM = 200rpm
Diagnostic Time
More than 1sec
Fail Safe
Locked as 4th gear
Fig 1) 1st gear in "D" range