P0743

DTC P0743 - TORQUE CONVERTER CLUTCH CIRCUIT ELECTRICAL

OUTLINE OF DIAGNOSIS
Judge NG when the lock-up duty solenoid becomes battery short, ground short or open circuit.

COMPONENT DESCRIPTION
Lock-up duty solenoid is installed to the transmission hydraulic control valve body. The duty ratio is controlled by the signal from TCM. This allows the lock-up clutch to be connected or released smoothly by controlling the lock-up control valve.




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
None

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