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 | 1. Input speed sensor fault 2. Output speed sensor fault 3. Clutch slip in Transmission ( UD brake, L/R brake, OWC) or oil pressure controller fault |
Enable Conditions |
•
Solenoid power voltage is above 10V
•
Oil Temperature Sensor is above -10℃
•
Time after shift changing finish more tnan 1sec.
•
Engine speed is above 400rpm
•
Output speed is above 200rpm
•
Input speed is above 0rpm
•
Shift stage 1st. gear
•
POSITION SWITCH is "D"range | |
Threshold value |
•
Output speed is higher than differene value of Input speed plus 200rpm devided by 1st speed gear ratio | |
Detecting Time |
•
1 sec and 4 times | |
Fail safe |
•
Locked into 4th gear |
