DTC 52 (P0741): Torque Converter Clutch System

DESCRIPTIONS OF MONITOR METHODS
At start of lock-up operation, if lock-up clutch cannot be engaged even when duty ratio of torque converter clutch solenoid remains 100% for more than specified time, PCM judges that torque converter clutch is stuck OFF.
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• DTC 21 (P0335): Crankshaft position sensor malfunction
• DTC 22 (P0715): Input shaft speed sensor malfunction
• DTC 23 (P0720): Output shaft speed sensor malfunction
• DTC 53 (P0742): Torque converter clutch system malfunction (Stuck ON)
• DTC 36 (P0743): Torque converter clutch solenoid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunction
• DTC 32 (P0758): Underdrive solenoid malfunction
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction

Sensor (The sensor below is determined to be normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Crankshaft position sensor
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• A/T control relay
LOGIC FLOW CHARTS (Monitor Sequence)
DTC SET CONDITIONS

Check Conditions
Solenoid status: plunging into connecting condition.
Transmission range switch position: D.

Judgement Criteria
Time during 100% duty: 4 seconds or more.
OBD-II DRIVE CYCLE PATTERN
Start the engine, and drive at 100 km/h (62 mph) for 10 seconds. Then stop the vehicle, and turn OFF the ignition switch. After that, restart the engine, and drive again at 100 km/h (62 mph) for 10 seconds.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
Malfunction of the torque converter clutch solenoid valve
Malfunction of the input shaft speed sensor
Malfunction of the valve body
Damaged harness or connector
Malfunction of the PCM
Malfunction of the torque converter