Component Location
General Description

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).

DTC Description

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.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

Check voltage range(Open, Shrot)

※ 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
Signal Waveform & Data

Fig 1) Torque Converter Operation

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