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 4.497, then the input speed is 4,497 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 | ● 1st gear incorrect ratio | ● Faulty Input speed sensor ● Faulty output speed sensor ● Faulty UD clutch or LR,RED brake or Oneway clutch1,2 |
Enable Conditions | ● Engine speed >450rpm ● Output speed >350rpm ● Shift stage 1st. gear ● Input speed >0rpm ● A/T oil temp output ≥ -23.5℃ ● 11V ≤ Battery Voltage ≤16V ● TRANSAXLE RANGE SWITCH is normal and after 2sec is passed from IG ON | |
Threshold Value | ● Input speed - output speed *1st gear ratio≥200rpm | |
Diagnostic Time | ● More than 4sec | |
Fail Safe | ● Locked into 3 rd gear. |
