P0743

DTC PO743
TORQUE CONVERTER CLUTCH SYSTEM (DUTY SOLENOID B) ELECTRICAL (LU)





Description
- This solenoid is mounted to the control valve, and its duty ratio is controlled by the signal sent from the Transmission Control Module (TCM). It then controls the lock-up control valve to provide smooth engagement and disengagement of the lock-up clutch.
- Regulates the hydraulic pressure of the lock-up clutch and operates in three modes (open, smooth and lock-up).

DTC Detecting Condition
Two consecutive trips with fault.

Trouble Symptom
No "locking-up" (after engine warm-up).











NOTE: For the diagnostic procedure on duty solenoid B circuit, refer to DTC 12.
DTC 12