P0748

DTC P0748 - PRESSURE CONTROL SOLENOID " A " ELECTRICAL

OUTLINE OF DIAGNOSIS
Judge NG when the line pressure duty solenoid becomes battery short, ground short or open circuit.

COMPONENT DESCRIPTION
Line pressure duty solenoid is installed to the transmission hydraulic control valve body. The duty ratio is controlled by the signal from TCM. This allows controlling the pressure modifier valve and accumulator control valve A, and allows the line pressure to be adjusted to the pressure appropriate for driving condition.




ENABLE CONDITION

GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.




DIAGNOSTIC METHOD

DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When " Clear Memory " was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When " Clear Memory " was performed

FAIL SAFE
Control the shift to be fixed in 3rd gear.

ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)