P0781 1-2 Shift: DTC Detecting Condition

DTC P0781 DETECTING CONDITION REFERENCE

Item	Detecting Condition	Possible Cause
DTC Strategy	Valve Stuck	Valve-body A/T Assembly CAUTION: 1: The detection criteria of S3 ON fail and 1-2 shift valve SP stick is the same, so if this detection criteria is fulfilled, then both S3 ON DTC and 1-2 shift valve DTC are stored. But if present gear judged 1st and current gear 2nd before this detection criteria is fulfilled, then only the DTC of 1-2 shift valve SP stick is stored. S3 ON fail and 1-2 shift valve SP stick can be distinguished by what present gear is made at current gear 2nd (Not 2nd EB). S3 ON fail: Current gear 2nd then present gear 2nd 1-2 shift valve SP stick : Current gear 2nd then present gear 1st
Enable Conditions	10.2V < Battery voltage < 14V Not error in system CAN communication : normal. Solenoid valve : normal
Threshold Value	Current gear 4th and Present gear 3rd Current gear 5th and Present gear neutral
Diagnostic Time	Immediately
Fail Safe	1st and 2nd gear inhibit at Manual mode * Only 1st and 2nd gear inhibit at Manual mode fail safe After 2 driving cycle of above detection continuously No up shift 4th, 5th and 6th 1-2 shift valve stick decision1 Not manual mode or2 Manual mode and speed < 80km/h