The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the 4th gear ratio, while the transaxle is engaged in the 4th gear.For example, if the output speed is 1,000rpm and the 4th gear ratio is 0.712 , then the input speed is 712 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 4th gear ratio, while the transaxle is engaged in 4th 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 & Limp Home | Possible Cause |
DTC Strategy | ● Rationality-high | ● Inspection components related to the UD and 2nd clutch inside A/T ● In case of incorrect output speed signal(In case of incorrect input speed signal, trouble code related to D/C is displayed, so do not think P0731~6 code "ON" as the external cause) |
Enable Conditions | ● Engine speed >450rpm Output speed >900rpm Shift stage 4th. gear Input speed >0rpm A/T oil temp sensor voltage <4.5V Voltage of Battery >10V | |
Threshold Value | ● ㅣinput speed/4th gear ratio - output speed ㅣ≥200rpm /4th. gear ratio | |
Diagnostic Time | ● More than 1sec | |
Fail Safe | ● Locked in 3 rd gear.(detecting once, diagnosis out and dectecting 4 times, control relay off) |
