P0743 Torque Converter Clutch Solenoid/Trans Relay Circuits

SYMPTOM
P-0743 TORQUE CONVERTER CLUTCH SOL/TRANS RELAY CKT

WHEN MONITORED
With the ignition key on.

SET CONDITION
An open or shorted condition is detected in the torque converter clutch solenoid control circuit.

POSSIBLE CAUSES
- Fused ignition switch output circuit open
- Torque converter clutch solenoid defective
- TCC solenoid circuit W/H intermittent defect
- TCC solenoid circuit W/H observable defect
- TCC solenoid control circuit open
- TCC solenoid control circuit short to ground
- PCM defective (TCC solenoid control circuit)