Genesis COUPE BK 2010, Manual

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The PCM/TCM controls the locking and unlocking of the Torque Converter Clutch ( or Damper Clutch ), to the input shaft of
the transmission, by appling hydraulic pressure. The main purpose of T/C clutch control is to save fuel by decreasing the
hydraulic load inside the T/C. The TCM outputs duty pulses to control the Damper Clutch Control Solenoid Valve( DCCSV )
and hydraulic pressure is applied to DC according to the DCC duty ratio value. When the duty ratio is high, high pressure is
applied and the Damper Clutch is locked. The normal operating range of the Damper Clutch Control current is from 0.05A
(unlocked) to 0.75A(locked).
The TCM checks the Damper Clutch Control Signal by monitoring the feedback signal from the solenoid valve drive circuit. If
an unexpected signal is monitored, (For example, high voltage is detected when low voltage is expected, or low voltage is
detected when high voltage is expected) the TCM judges that the DCCSV circuit is malfunctioning and sets this code.
GENESIS COUPE(BK) >2010 > G 2.0 DOHC > Automatic Transmission System > Automatic
Transmission System > P0743 Torque Converter Clutch Circuit Electrical
Component Location
General Description
DTC Description
DTC Detectiong Condition
Item Detecting Condition Possible Cause
DTC Strategy • Check voltage range(Open, Shrot)
Ͻ
Torque Converter Clutch =
Damper Clutch
• Faulty Torque Conveter Clutch
• Faulty Torque Conveter Clutch
Solenoid Valve
• Faulty Valve Body
• Fautly PCM/TCM
Enable Conditions • 10V < Actuator Supply Voltage < 16V
Threshold Value • Hardware IC check
Diagnostic Time • More than 0.2sec
Fail Safe
• Torque Converter Clutch "OFF"
• Locked as 4th gear
Diagnostic Circuit Diagram