DTC P0731 Gear 1 Incorrect Ratio: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition & Fail Safe	Possible cause
DTC Strategy	1st gear incorrect ratio	Faulty input speed sensor Faulty output speed sensor Faulty R/C or OWC F/C-Front Clutch R/C - Rear Clutch E/C - End Clutch OWC - One Way Clutch K/B - Kickdown brake L/R - Low & Reverse brake
Enable Conditions	Engine speed > 400 RPM Output speed (PG-B) > 300 RPM Shift stage 1st gear Input speed (PG-A) > 300 RPM A/T fluid temp. >-10°C (14°F) TRANSAXLE RANGE SWITCH is normal Solenoid is normal
Threshold Value	Input speed (Nt) > (1st gear ratio Output speed +200)
Diagnostic Time	More than 1sec
Fail Safe	Locked into 3rd gear. (If diagnosis code P0731 is output four times, the transaxle is locked into 3rd gear)