This code is set when Input speed sensor value is different with TCM operation value, caused by control valve sticking, solenoid valve fault(most of fault is mechanical, rarely electrical fault).
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
1st gear incorrect ratio |
•
Input speed sensor fault
•
Output speed sensor fault
•
Clutch slip in Transmission ( UD brake, L/R brake, OWC) or oil pressure controller fault |
Enable Conditions |
•
Solenoid power voltage> 10V
•
Oil Temperature Sensor >-10℃
•
Time after shift changing finish > 1sec
•
Engine speed >400rpm
•
Output speed >150rpm
•
Input speed > 0rpm
•
Shift stage 1st. gear
•
TR switch = "D"range | |
Threshold value |
•
Output speed<(input speed-200rpm)/1st. gear ratio | |
Detecting Time |
•
1 sec and 4 times | |
Fail safe |
•
Locked into 4th gear |
