Lexus ES: Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off (P27567F)

Lexus ES (XZ10) Service Manual / Drivetrain / Ub80f (automatic Transmission / Transaxle) / Automatic Transaxle System / Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off (P27567F)

DESCRIPTION

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.

*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	All of the following conditions are met (2-trip detection logic): Engine coolant temperature is 40°C (104°F) or higher. ATF temperature is -10°C (14°F) or higher. The vehicle is being driven with the shift lever in D. No malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLU and SLT) valves, transmission revolution sensors (NT and NC), coolant temperature sensor, oil temperature sensor, knock sensor, crankshaft position sensor circuits, electronic throttle or CAN communication system. Any of the following conditions are met: When the ECM sends a lock-up OFF request, the difference between the input turbine speed (NT) and the engine speed (NE) is less than 35 rpm for 1.8 seconds or more. When the ECM sends a lock-up ON request, the difference between the input turbine speed (NT) and the engine speed (NE) is 170 rpm or more for 3.5 seconds or more.	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

All of the following conditions are met (2-trip detection logic):

Engine coolant temperature is 40°C (104°F) or higher.
ATF temperature is -10°C (14°F) or higher.
The vehicle is being driven with the shift lever in D.
No malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLU and SLT) valves, transmission revolution sensors (NT and NC), coolant temperature sensor, oil temperature sensor, knock sensor, crankshaft position sensor circuits, electronic throttle or CAN communication system.
Any of the following conditions are met:
- When the ECM sends a lock-up OFF request, the difference between the input turbine speed (NT) and the engine speed (NE) is less than 35 rpm for 1.8 seconds or more.
- When the ECM sends a lock-up ON request, the difference between the input turbine speed (NT) and the engine speed (NE) is 170 rpm or more for 3.5 seconds or more.

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

Comes on

DTC stored

SAE Code:

P2757

DTC Detection Condition Patterns:

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnostic Condition	Engine coolant temperature is 40°C (104°F) or higher.	○	○
	ATF temperature is -10°C (14°F) or higher.	○	○
	The vehicle is being driven with the shift lever in D.	○	○
	No malfunctions are detected in the solenoid (SL1, SL2, SL3, SL4, SL5, SL6, SL, SLU and SLT) valves, transmission revolution sensors (NT and NC), coolant temperature sensor, oil temperature sensor, knock sensor, crankshaft position sensor circuits, electronic throttle or CAN communication system.	○	○
Malfunction Condition	When the ECM sends a lock-up OFF request, the difference between the input turbine speed (NT) and the engine speed (NE) is less than 35 rpm.	○	-
Malfunction Condition	When the ECM sends a lock-up ON request, the difference between the input turbine speed (NT) and the engine speed (NE) is 170 rpm or more.	-	○
Duration		1.8 seconds or more	3.5 seconds or more
Detection Logic		2-trip detection logic	2-trip detection logic

HINT:

This DTC is stored when either of the above detection patterns is met.

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 solenoid (SLU) valve. When the solenoid (SLU) valve 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 solenoid (SLU) valve, 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 170 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: Solenoid (SLU) valve/OFF malfunction Solenoid (SLU) valve/ON malfunction
Required sensors/components	Solenoid (SLU) valve
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 the following DTCs are not stored	P0717, P07BF, P07C0 (Turbine speed sensor circuit) P0793, P07C5, P07C6 (Intermediate shaft speed sensor circuit) P0962, P0963 (Solenoid (SL1) valve circuit) P0966, P0967 (Solenoid (SL2) valve circuit) P0970, P0971 (Solenoid (SL3) valve circuit) P2814, P2815 (Solenoid (SL4) valve circuit) P281D, P281E (Solenoid (SL5) valve circuit) P08C1, P08C2 (Solenoid (SL6) valve circuit) P2763, P2764 (Solenoid (SLU) valve circuit) P2769, P2770 (Solenoid (SL) valve circuit) P2720, P2721 (Solenoid (SLT) valve 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, P0658, P2102, P2103, P2111, P2112, P2119, P2135 ((ETCS) Electronic throttle control system) U0100 (CAN communication system)
Shift position	"D", "not R" and "not N"
Elapsed time since shift lever moved from "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	444 kPa (4.5 kgf/cm2, 64 psi) or more
- when A/C on	444 kPa (4.5 kgf/cm2, 64 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	6% or more at turbine speed 2000 rpm (Conditions vary with turbine speed)
Calculated load value	-
- when A/C off	16% or more at turbine speed 2000 rpm (Conditions vary with turbine speed)
- when A/C on	21% or more at turbine speed 2000 rpm (Conditions vary with turbine speed)
Calculated input torque	0 Nm (0 kgfcm, 0 ft.*lbf) or more

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)

4.454 or more and 9.051 or less

(When output speed less than 60 rpm)

(b) NT-NO x 1st gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 60 rpm or more)

2nd gear

Any of the following conditions are met

(a) or (b)

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

2.758 or more and 3.297 or less

(When output speed less than 190 rpm)

(b) NT-NO x 2nd gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 190 rpm or more)

3rd gear

Any of the following conditions are met

(a) or (b)

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

1.817 or more and 2.082 or less

(When output speed less than 380 rpm)

(b) NT-NO x 3rd gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 380 rpm or more)

4th gear

Any of the following conditions are met

(a) or (b)

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

1.368 or more and 1.544 or less

(When output speed less than 570 rpm)

(b) NT-NO x 4th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 570 rpm or more)

5th gear

Any of the following conditions are met

(a) or (b)

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

1.129 or more and 1.308 or less

(When output speed less than 570 rpm)

(b) NT-NO x 5th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 570 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 770 rpm)

(b) NT-NO x 6th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 770 rpm or more)

7th gear

Any of the following conditions are met

(a) or (b)

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

0.744 or more and 0.876 or less

(When output speed less than 780 rpm)

(b) NT-NO x 7th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 780 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 960 rpm)

(b) NT-NO x 8th gear ratio

-50 rpm or more and 50 rpm or less

(When output speed 960 rpm or more)

Quick engagement detection:

l Engine speed - Turbine speed l	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 ratio)

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

170 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

ON malfunction (C)

Solenoid (SLT) valve

ON malfunction

Neutral state flag:

Turbine speed - output speed x (ECM selected gear ratio)

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 engine switch on (IG) and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for 2 minutes or more.
Turn the engine switch on (IG) 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 engine switch on (IG).

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

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 solenoid valve is stuck ON or OFF, DTCs for several solenoid valves including the malfunctioning solenoid valve will be stored.

GO TO DTC CHART

2.	INSPECT SOLENOID (SLU) VALVE

(a) Remove the solenoid (SLU) valve.

Click here

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

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

Standard Resistance:

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

(c) Connect a positive (+) lead from the battery with a 21 W bulb to terminal 1 and a negative (-) lead 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 SOLENOID (SLU) VALVE

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 REGISTRATION

SEE MORE:

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DESCRIPTION These DTCs are stored when the clearance warning ECU assembly cannot receive and recognize several signals via the CAN communication line. DTC No. Detection Item DTC Detection Condition Trouble Area U0073 Control Module Communication Bus "A" Off Control module communicat

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

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