UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P27567F; Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off; 2018 MY Sienna [11/2017

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM1000000018CM7
Model Year Start: 2018	Model: Sienna	Prod Date Range: [11/2017 - 08/2018]
Title: UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P27567F; Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off; 2018 MY Sienna [11/2017 - 08/2018]

DTC

P27567F

Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off

DESCRIPTION

The ECM controls the shift solenoid valve SLU 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 shift solenoid valve SLU, transmission valve body assembly and torque converter assembly.

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 shift solenoid valves SL1, SL2, SL3, SL4, SL5, SL6, SL, SLT and SLU, transmission revolution sensors (NT and NC), engine coolant temperature sensor, ATF temperature sensor, knock 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 shift solenoid valves SL1, SL2, SL3, SL4, SL5, SL6, SL, SLT and SLU, transmission revolution sensors (NT and NC), engine coolant temperature sensor, ATF temperature sensor, knock 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

Shift solenoid valve SLU
Transmission valve body assembly
Torque converter assembly
Automatic transaxle assembly

Comes on

DTC stored

SAE Code:

P2757

MONITOR DESCRIPTION

Torque converter lock-up is controlled by the ECM based on the transmission revolution sensor (NT and NC), engine speed, engine load, engine temperature, vehicle speed, ATF temperature and gear selection signals. The ECM determines the lock-up status of the torque converter assembly by comparing the engine speed (NE) to the transmission revolution sensor (NT) signal. The ECM calculates the actual gear by comparing the transmission revolution sensor (NT) signal to the transmission revolution sensor (NC) signal. When conditions are appropriate, the ECM requests "lock-up" by applying voltage to the shift solenoid valve SLU. When the shift solenoid valve SLU is turned on, pressure is applied to the lock-up relay valve and locks the torque converter assembly.

If the ECM does not detect lock-up after lock-up has been requested or if it detects lock-up when it is not requested, it interprets this as a malfunction of the shift solenoid valve SLU, illuminates the MIL and stores this DTC.

HINT:

Example:

When any of the following is met, the system judges it as a malfunction.

There is a difference in speed between the input side (engine speed) and output side (input turbine speed) of the torque converter assembly when the ECM commands lock-up. (Engine speed is at least 70 rpm more than input turbine speed.)
There is no difference in speed between the input side (engine speed) and output side (input turbine speed) of the torque converter assembly when the ECM commands lock-up off. (The difference between engine speed and input turbine speed is less than 35 rpm.)

MONITOR STRATEGY

Related DTCs	P2757: Shift solenoid valve SLU/OFF malfunction Shift solenoid valve SLU/ON malfunction
Required sensors/Components	Shift solenoid valve SLU
Frequency of operation	Continuous
Duration	OFF malfunction: 3.5 sec. ON malfunction (A): 1.8 sec. ON malfunction (B): 0.5 sec. ON malfunction (C): -
MIL operation	2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever this DTC is not present. (Not circuit malfunction)	P0717, P07BF, P07C0 (Turbine speed sensor circuit) P0793, P07C5, P07C6 (Intermediate shaft speed sensor circuit) P0962, P0963 (Shift solenoid valve SL1 circuit) P0966, P0967 (Shift solenoid valve SL2 circuit) P0970, P0971 (Shift solenoid valve SL3 circuit) P2814, P2815 (Shift solenoid valve SL4 circuit) P281D, P281E (Shift solenoid valve SL5 circuit) P08C1, P08C2 (Shift solenoid valve SL6 circuit) P2764, P2763 (Shift solenoid valve SLU circuit) P2769, P2770 (Shift solenoid valve SL circuit) P2720, P2721 (Shift solenoid valve SLT circuit) P0712, P0713 (ATF temperature sensor circuit (TFT sensor)) P0117, P0118 (ECT sensor circuit) P0335, P0337, P0338 (Crankshaft Position Sensor circuit) P0327, P0328, P0332, P0333 (KCS sensor circuit) P0121, P0122, P0123, P0222, P0223, P0604, P0606, P060A, P060B, P060D, P060E, P061E, P0657, P658, P2102, P2103, P2111, P2112, P2119, P2135 ((ETCS) Electronic throttle control system) U0100 (CAN communication system)
NSW switch	"D" and "not R" and "not N"
Duration time from shifting "N" to "D"	4 sec. or more
ATF temperature	-10°C (14°F) or more
Engine	Starting

OFF malfunction

Fail-safe function does not operate due to the following malfunctions:	-
Solenoid (SLT) valve	ON malfunction (P2714)
Solenoid (SLU) valve	OFF or ON malfunction (P2757)
Solenoid (SL) valve	ON malfunction (P0741)
ECT	40°C (104°F) or more
Spark advance from MAX. retard timing by KCS control	0 °CA or more
ECM selected gear	Actual gear
Vehicle speed	10 km/h (6.2 mph) or more
ECM commanded solenoid (SL) valve state	OFF
ECM commanded pressure value using solenoid (SLU) valve (3 sec. or more)	-
When A/C off	515 kPa (5.25 kgf/cm², 74.7 psi) or more
When A/C on	515 kPa (5.25 kgf/cm², 74.7 psi) or more

ON malfunction (A)

Fail-safe function does not operate due to the following malfunctions:	-
Solenoid (SLT) valve	ON malfunction (P2714)
Solenoid (SLU) valve	OFF or ON malfunction (P2757)
Solenoid (SL) valve	ON malfunction (P0741)
ECT	40°C (104°F) or more
Spark advance from MAX. retard timing by KCS control	0 °CA or more
ECM selected gear	Actual gear
Vehicle speed	10 km/h (6.2 mph) or more and less than 60 km/h (37.3 mph)
Quick engagement detection	Fixed
ECM commanded pressure value using solenoid (SLU) valve	0 kPa (0 kgf/cm², 0 psi) or less
Time since ECM commanded solenoid (SL) valve OFF	0.15 sec. or more
Throttle valve opening angle	5% or more at turbine speed 3000 rpm (Conditions vary with turbine speed)
Calculated load value	-
When A/C off	15% or more at turbine speed 2000 rpm (Conditions vary with turbine speed)
When A/C on	20% or more at turbine speed 2000 rpm (Conditions vary with turbine speed)

ON malfunction (B)

Fail-safe function does not operate due to the following malfunctions:	-
Solenoid (SL1) valve	OFF or ON malfunction (P0746)
Solenoid (SL2) valve	OFF or ON malfunction (P0776)
Solenoid (SL3) valve	OFF or ON malfunction (P0796)
Solenoid (SL4) valve	OFF or ON malfunction (P2808)
Solenoid (SL5) valve	OFF or ON malfunction (P2817)
Solenoid (SL6) valve	OFF or ON malfunction (P08BB)
Solenoid (SLT) valve	OFF malfunction (P2714)
Solenoid (SLU) valve	ON malfunction (P2757)
Solenoid (SL) valve	ON malfunction (P0741)
All shift solenoid	Not being stopped
Neutral command flag	Not met
Vehicle stop check	Fixed
ECM selected gear	3rd, 4th, 6th or 7th

ON malfunction (C)

ECM selected gear

3rd, 4th, 6th or 7th

HINT:

Actual gear:

1st gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

4.682 or more and 9.515 or less

(When output speed less than 50 rpm)

(b) NT-NO x 1st gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 50 rpm or more)

2nd gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

2.900 or more and 3.467 or less

(When output speed less than 180 rpm)

(b) NT-NO x 2nd gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 180 rpm or more)

3rd gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

1.910 or more and 2.189 or less

(When output speed less than 350 rpm)

(b) NT-NO x 3rd gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 350 rpm or more)

4th gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

1.401 or more and 1.581 or less

(When output speed less than 350 rpm)

(b) NT-NO x 4th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 350 rpm or more)

5th gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

1.142 or more and 1.323 or less

(When output speed less than 550 rpm)

(b) NT-NO x 5th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 550 rpm or more)

6th gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

0.934 or more and 1.065 or less

(When output speed less than 750 rpm)

(b) NT-NO x 6th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 750 rpm or more)

7th gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

0.737 or more and 0.867 or less

(When output speed less than 750 rpm)

(b) NT-NO x 7th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 750 rpm or more)

8th gear

Any of the following conditions are met

(a) or (b)

(a) Turbine speed / Output speed (NT/NO)

0.621 or more and 0.725 or less

(When output speed less than 950 rpm)

(b) NT-NO x 8th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 950 rpm or more)

Quick engagement detection:

Engine speed - Turbine speed	Less than 50 rpm
Time since ECM commanded solenoid (SL) valve OFF	Less than 0.28 sec.

Vehicle stop check:

Vehicle speed

0 km/h (0 mph) or less

Neutral state flag:

Turbine speed - output speed x (ECM selected gear)

1000 rpm or more

Neutral command flag:

Engine speed	7200 rpm or more
Turbine speed	7200 rpm or more

Any of the following conditions are met: Condition (a) or (b)

Condition (a)

ECM selected gear	6th or 7th or 8th
Output speed x 5th gear ratio	7200 rpm or more

Condition (b)

ECM selected gear	4th or 5th
Output speed x 3rd gear ratio	7200 rpm or more

TYPICAL MALFUNCTION THRESHOLDS

OFF malfunction

Engine speed - Turbine speed

70 rpm or more

ON malfunction

Any of the following conditions are met: ON malfunction (A), (B) or (C)

ON malfunction (A)

l Engine speed - Turbine speed l

Less than 35 rpm

ON malfunction (B)

Neutral state flag

ON malfunction (C)

Solenoid (SLT) valve

ON malfunction

Neutral state flag:

Turbine speed - output speed x (ECM selected gear)

1000 rpm or more

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

HINT:

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
Click here

Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and turn the Techstream on.
Start the engine.
Perform the Lock-up Function inspection in Road Test. [*1]
Click here

HINT:

[*1] : Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Stop the vehicle.
Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
Input the DTC: P27567F.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

HINT:

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs.
Click here
Perform registration and/or initialization when parts related to the automatic transaxle are replaced.
Click here

PROCEDURE

1.	CHECK DTC OUTPUT (IN ADDITION TO DTC P27567F)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Transmission / Trouble Codes.

(e) Read the DTCs using the Techstream.

Result	Proceed to
Only DTC P27567F is output	A
DTC P27567F and other DTCs are output	B

HINT:

If any DTCs other than P27567F are output, perform troubleshooting for those DTCs first.
If a shift solenoid valve is stuck ON or OFF, DTCs for several shift solenoid valves including the malfunctioning shift solenoid valve will be stored.

GO TO DTC CHART

2.	INSPECT SHIFT SOLENOID VALVE SLU

(a) Remove the shift solenoid valve SLU.

Click here

*a	Component without harness connected (Shift Solenoid Valve SLU)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Shift solenoid valve SLU connector terminal 1 - Terminal 2	20°C (68°F)	5.0 to 5.6 Ω

(c) Connect a positive (+) lead from the battery to terminal 1 and a negative (-) lead with a 21 W bulb to terminal 2 of the solenoid valve connector. Check that the valve moves and makes an operating sound.

OK:

Valve moves and makes an operating sound.

REPLACE SHIFT SOLENOID VALVE SLU

3.	INSPECT TRANSMISSION VALVE BODY ASSEMBLY

(a) Inspect the transmission valve body assembly.

Click here

OK:

There is no foreign matter on each valve and they operate smoothly.

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

4.	INSPECT TORQUE CONVERTER ASSEMBLY

(a) Inspect the torque converter assembly.

Click here

OK:

The torque converter assembly is normal.

REPAIR OR REPLACE TORQUE CONVERTER ASSEMBLY

5.	REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY

(a) Repair or replace the automatic transaxle assembly.

Click here

PERFORM A/T CODE REGISTRATION