General Information

Automatic Transaxle

P0781 1-2 Shift - General Information

Component Location





General Description

1-2 Shift valve is shift to oil-pathway in order to maintain over the 2nd gear shifting. 1-2 Shift valve function is deliver oil-pressure to clutch that over the 2nd gear operation element, When 1-2 shifting.

DTC Description

TCM set this code If the rear gear ratio that calculated by Engine speed/Output speed and the target gear ratio that calculated by compounding of solenoid valves are not match.

DTC Detecting Condition






Diagnostic Circuit Diagram





Signal Waveform & Data




































Fig 1) D Range-1st gear
Fig 2) D Range-2nd gear
Fig 3) Sports mode -1st gear
Fig 4) Sports mode -2nd gear
Fig 5) Sports mode -3rd gear
Fig 6) Sports mode -4th gear
Fig 7) Sports mode -5th gear
Fig 8) Sports mode -6th gear
Fig 9) Reverse