Genesis COUPE BK 2010, Manual

Page: 84 / 168

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 PCM/TCM increases the duty ratio to engage the Damper Clutch by monitoring slip rpms (difference vlaue beteween
engine speed and turbine speed ).
To decrease the slip of the Damper Clutch, the TCM increases the duty ratio by appling more hyraulic pressure. When slip
rpm does not drop under some value with 100% duty ratio, the PCM/TCM determines that the Torque Converter Clutch is
stuck OFF and sets this code.
GENESIS COUPE(BK) >2010 > G 2.0 DOHC > Automatic Transmission System > Automatic
Transmission System > P0741 Torque Converter Clutch Circuit Performance or Stuck Off
Component Location
General Description
DTC Description
DTC Detectiong Condition
Item Detecting Condition Possible Cause
DTC Strategy • Rationality(Damper clutch open stuck)
Ͻ
Torque Converter Clutch =
Damper Clutch
• Faulty Torque Conveter Clutch
• Faulty Torque Conveter Clutch
Solenoid Valve
• Faulty Valve Body
• Fautly PCM/TCM
Enable Conditions
• Input speed > 0
• Duty of damper clutch solenoid valve 100%
Threshold Value
• Amount of slip(engine speed-turbine speed) when DCSV
is applied 100% duty
• Engine speed-Input speed > 100 RPM
Diagnostic Time • More than 5sec
Fail Safe • Damper clutch "OFF"
Diagnostic Circuit Diagram