DTC P2756-7F: Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off [11/2016 - ]: Description

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

The ECM controls the solenoid (SLU) valve using a predetermined current, 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 mechanical malfunctions of the solenoid (SLU) valve, transmission valve body assembly and torque converter assembly.

Fig 1: Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off [11/2016 - ]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	Spool Valve	*2	Sleeve
*3	Solenoid Coil	-	-
*a	Current	*b	Hydraulic Pressure

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P27567F	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 higher, ATF temperature is -10°C (14°F) or higher, and the ECM sends a lock-up off request (no malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLT and SLU) valves, transmission revolution sensors (NT, NC), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2) The difference between the input turbine speed (NT) and the engine speed (NE) is less than 35 rpm 1.8 seconds or more 2-trip detection logic SLU stuck OFF malfunction: Engine coolant temperature is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher, and the ECM sends a lock-up on request (no malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLT and SLU) valves, transmission revolution sensors (NT, NC), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2) The difference between the input turbine speed (NT) and the engine speed (NE) is 70 rpm or more 3.5 seconds or more 2-trip detection logic	Solenoid (SLU) valve Transmission valve body assembly Torque converter assembly Automatic transaxle assembly	Comes on	DTC stored	SAE Code: P2757

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P27567F

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 higher, ATF temperature is -10°C (14°F) or higher, and the ECM sends a lock-up off request (no malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLT and SLU) valves, transmission revolution sensors (NT, NC), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2)
The difference between the input turbine speed (NT) and the engine speed (NE) is less than 35 rpm
1.8 seconds or more
2-trip detection logic

SLU stuck OFF malfunction:

Engine coolant temperature is 40°C (104°F) or higher, ATF temperature is -10°C (14°F) or higher, and the ECM sends a lock-up on request (no malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLT and SLU) valves, transmission revolution sensors (NT, NC), engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle, crankshaft position sensor or CAN2)
The difference between the input turbine speed (NT) and the engine speed (NE) is 70 rpm or more
3.5 seconds or more
2-trip detection logic

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

Comes on

DTC stored

SAE Code:
P2757