DTC P2756-7F: Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off [10/2015 - ]: Description

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The ECM controls the lock-up solenoid, and performs lock-up and flex lock-up control.

The ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the ECM memory to detect solenoid (SLU) valve, transmission valve body assembly and torque converter mechanical problems.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P2756-7F	Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off	1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other SLU stuck ON malfunction: Engine coolant temperature is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and the ECM sends a lock-up off request (no malfunctions are detected in solenoid (SL1, SL2, SL3, SL4, SL5, SC1 and SC2) valves, transmission revolution sensors (NT, NC3, SP2), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2). When the ECM commands lock-up OFF, the difference between the turbine speed (NT) and the engine speed (NE) is less than 20 rpm Malfunction status continues for 1.8 seconds or more 2-trip detection logic SLU stuck OFF malfunction: Engine coolant temperature is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and the ECM sends a lock-up on request (no malfunctions are detected in solenoid (SL1, SL2, SL3, SL4, SL5, SC1 and SC2) valves, transmission revolution sensors (NT, NC3, SP2), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2). When the ECM commands lock-up ON, the difference between the turbine speed (NT) and the engine speed (NE) is 70 rpm or more Malfunction status continues for 2.0 seconds or more 2-trip detection logic	Solenoid (SLU) valve Transmission valve body assembly Torque converter assembly Automatic transmission assembly	Comes on	DTC stored	SAE Code: P2757

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P2756-7F

Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other

SLU stuck ON malfunction:

Engine coolant temperature is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and the ECM sends a lock-up off request (no malfunctions are detected in solenoid (SL1, SL2, SL3, SL4, SL5, SC1 and SC2) valves, transmission revolution sensors (NT, NC3, SP2), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2).
When the ECM commands lock-up OFF, the difference between the turbine speed (NT) and the engine speed (NE) is less than 20 rpm
Malfunction status continues for 1.8 seconds or more
2-trip detection logic

SLU stuck OFF malfunction:

Engine coolant temperature is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and the ECM sends a lock-up on request (no malfunctions are detected in solenoid (SL1, SL2, SL3, SL4, SL5, SC1 and SC2) valves, transmission revolution sensors (NT, NC3, SP2), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2).
When the ECM commands lock-up ON, the difference between the turbine speed (NT) and the engine speed (NE) is 70 rpm or more
Malfunction status continues for 2.0 seconds or more
2-trip detection logic

Solenoid (SLU) valve
Transmission valve body assembly
Torque converter assembly
Automatic transmission assembly

Comes on

DTC stored

SAE Code:
P2757