The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the 2nd gear ratio, while the transaxle is engaged in the 2nd gear. For example, if the output speed is 1000 rpm and the 2nd gear ratio is 1.529, then the input speed is 1,529 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 2nd gear ratio, while the transaxle is engaged in 2nd 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
2nd gear incorrect ratio
Faulty Input speed sensor
Faulty output speed sensor
Faulty UD clutch or 2nd brake
Enable Conditions
Engine speed >450rpm
Output speed >500rpm
Shift stage 2st. gear
Input speed >0rpm
A/T oil temp sensor voltage<4.5V
Voltage of Battery >10V
Time after shift changing finish >2secs
A/T range switch Only one signal
Threshold Value
Output speed>(input speed+200rpm)/2nd. gear ratio
Output speed<(input speed-200rpm)/2nd. gear ratio
Diagnostic Time
More than 1sec 4times
Fail Safe
Locked into 3 rd gear.(If diagnosis code P0732 is output four times, the transaxle is locked into 3rd gear)
A : INPUT SPEED SENSOR
B : OUTPUT SPEED SENSOR