Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off (P275600,P27567E)

Toyota Corolla Cross (2022-2024) Service Manual / Drivetrain / K120f (cvt) / Continuously Variable Transaxle System / Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off (P275600,P27567E)

DESCRIPTION

Using the current from the TCM, the shift solenoid valve SLU controls the lock-up clutch pressure, and performs lock-up and flex lock-up control.

The TCM compares the engagement condition of the lock-up clutch with the lock-up schedule in the TCM 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

P275600

Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off

When the TCM commands lock-up ON, the difference between the engine speed (NE) and transmission revolution sensor (NT) signal is 250 rpm or more for 1 second or more (2-trip detection logic).
  • Transmission valve body assembly (Shift solenoid valve SLU)
  • Continuously variable transaxle assembly
  • Torque converter assembly

Comes on

DTC stored

SAE Code:

P2757

P27567E

Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck On

When the TCM commands lock-up OFF, the difference between the engine speed (NE) and transmission revolution sensor (NT) signal is less than 25 rpm for 1 second or more (1-trip detection logic).
  • Transmission valve body assembly (Shift solenoid valve SLU)
  • Continuously variable transaxle assembly
  • Torque converter assembly

Comes on

DTC stored

SAE Code:

P2757

MONITOR DESCRIPTION

When performing lock-up control (ON/OFF) of the torque converter assembly, the TCM compares the transmission revolution sensor (NT) signal and engine speed (NE) signal to detect mechanical malfunctions in the shift solenoid valves SLU.

If the torque converter does not lock-up while a lock-up ON command is being sent, the TCM detects it as a mechanical malfunction of the shift solenoid valve SLU.

If the difference between the engine speed (NE) signal and transmission revolution sensor (NT) signal is outside of the threshold, the TCM detects the malfunction, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P2757: Torque converter clutch pressure control solenoid (Shift solenoid valve SLU)/Functional check

Required sensors/Components

Crankshaft position sensor

Transmission revolution sensor (NT)

CVT fluid temperature sensor

Engine coolant temperature sensor

Oil pressure sensor

Shift solenoid valve SL1

Shift solenoid valve SL2

Shift solenoid valve SLP

Shift solenoid valve SLS

Shift solenoid valve SLU

Frequency of operation

Continuous

Duration

OFF malfunction (A): 2 sec.

OFF malfunction (B): 2 sec.

ON malfunction: 1 sec.

MIL operation

OFF malfunction (A) and (B): 2 driving cycles

ON malfunction: 1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

ETC system

(Electronic throttle control system)

Not system down

(MIL illuminated by following codes: P0121, P0122, P0123, P0222, P0223, P0604, P0606, P0607, P060D, P060E, P0657, P0658, P1607, P16B0, P2102, P2103, P2111, P2112, P2119, P2135)

KCS sensor circuit

(Knock sensor)

Not circuit malfunction

(MIL illuminated by following codes: P0327, P0328)

ECT sensor circuit

(Engine coolant temperature sensor)

Not circuit malfunction

(MIL illuminated by following codes: P0117, P0118)

IAT sensor circuit

(Intake air temperature sensor)

Not circuit malfunction

(MIL illuminated by following codes: P0112, P0113)

Crankshaft position sensor "A" circuit

(Crankshaft position sensor)

Not circuit malfunction

(MIL illuminated by following codes: P0335, P0337, P0338)

CAN communication between ECM and TCM

Not system down

(MIL illuminated by following codes: U0100, U0101)

Low voltage flag

OFF

Pressure control solenoid "J" circuit

(Shift solenoid valve SLP)

Not circuit malfunction

(MIL illuminated by following codes: P2826, P2827)

Pressure control solenoid "K" circuit

(Shift solenoid valve SLS)

Not circuit malfunction

(MIL illuminated by following codes: P282F, P2830)

Torque converter clutch pressure control solenoid circuit

(Shift solenoid valve SLU)

Not circuit malfunction

(MIL illuminated by following codes: P2763, P2764)

Pressure control solenoid "A" circuit

(Shift solenoid valve SL1)

Not circuit malfunction

(MIL illuminated by following codes: P0962, P0963)

Pressure control solenoid "B" circuit

(Shift solenoid valve SL2)

Not circuit malfunction

(MIL illuminated by following codes: P0966, P0967)

Pressure control solenoid "M" circuit

(Shift solenoid valve SLG)

Not circuit malfunction

(MIL illuminated by following codes: P08CA, P08CB)

Transmission fluid temperature sensor "A" circuit

(CVT fluid temperature sensor)

Not circuit malfunction

(MIL illuminated by following codes: P0712, P0713)

Turbine speed sensor "A" circuit

(Transmission revolution sensor (NT))

Not circuit malfunction

(MIL illuminated by following codes: P0717, P07BF, P07C0)

Intermediate shaft speed sensor "C" circuit

(Transmission revolution sensor (NSS))

Not circuit malfunction

(MIL illuminated by following codes: P07C9, P07CA, P2751)

Gear shift position circuit

Not circuit malfunction

(MIL illuminated by following codes: P0916, P0917)

Output speed sensor circuit

(Transmission revolution sensor (NOUT))

Not circuit malfunction

(MIL illuminated by following codes: P0722, P077C, P077D)

Intermediate shaft speed sensor "B" circuit

(Transmission revolution sensor (NC1))

Not circuit malfunction

(MIL illuminated by following codes: P07C7, P07C8, P2747)

Ignition switch

On (IG)
OFF malfunction (A)

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

-

(a) Gear mode clutch

Engaged

(b) Belt mode clutch

Engaged

Engine speed

1000 rpm or more

Shift solenoid valve SLP

Operating shift control by TCM command
OFF malfunction (B)

Engine speed

550 rpm or more

Transmission fluid temperature

-10°C (14°F) or more

Time after following condition is met

0.5 sec. or more

- l Variation of the accelerator pedal angle l

(within 32.768 msec.)

Less than 0.5%

Shift solenoid valve SLS

Operating clamping pressure control by TCM command

ECT

60°C (140°F) or more

Spark advance from MAX. retard timing by KCS control

0°CA or more

Gear and belt mode clutch

Either engagement or disengagement
ON malfunction

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

-

(a) Gear mode clutch

Engaged

(b) Belt mode clutch

Engaged

Calculated input torque

at Turbine speed 2000 rpm

(Conditions vary with turbine speed)

74 N*m (755 kgf*cm, 55 ft.*lbf) or more

Engine speed

500 rpm or more

Accelerator pedal release flag

OFF

Shift solenoid valve SLP

Operating shift control by TCM command

TYPICAL MALFUNCTION THRESHOLDS

OFF malfunction
  • Both of the following conditions are met: OFF malfunction (A) and (B) OFF malfunction (A)

    l Engine speed - Turbine Speed l

    250 rpm or more

    TCM indicate lock-up clutch

    Engagement
    OFF malfunction (B) (after OFF malfunction (A) is met)

    Target clamping pressure

    1.4 MPa (14.3 kgf/cm2, 203 psi) or more

    Actual clamping pressure - Target clamping pressure

    Less than 0.5 MPa (5.1 kgf/cm2, 73 psi)
  • ON malfunction

    l Engine speed - Turbine Speed l

    Less than 25 rpm

    TCM indicate lock-up clutch

    Release

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

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Turn the ignition switch to ON and turn the GTS on.
  4. Start the engine.
  5. Drive the vehicle and confirm the lock-up on and off conditions according to 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.

  6. Stop the vehicle.
  7. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  8. Input the DTC: P275600 or P27567E.
  9. Check the DTC judgment result.

    GTS 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 continuously variable transaxle system are replaced.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

HINT:

If any DTCs other than P275600 or P27567E are output, perform troubleshooting for those DTCs first.

PROCEDURE

1.

CHECK DTC OUTPUT (IN ADDITION TO DTC P275600 AND P27567E)

(a) Enter the following menus:

Powertrain > Transmission > Trouble Codes

(b) Read the DTCs using the GTS.

HINT:

  • If DTC P275612 or P275614 is output, perform troubleshooting for that DTC first.
  • If DTCs P275612 and P275614 are not output but DTC P281F00 is output, perform troubleshooting for DTC P281F00 first.

Result

Proceed to

Only DTC P275600 and/or P27567E is output

A

DTC P275600 and/or P27567E and P275612 are output

B

DTC P275600 and/or P27567E and P275614 are output

C

DTC P275600 and P281F00 are output

D

DTC P275600 and/or P27567E and DTCs other than P275612, P275614 and P281F00 are output

E
B

GO TO DTC CHART (DTC P275612)

C

GO TO DTC CHART (DTC P275614)

D

GO TO DTC CHART (DTC P281F00)

E

GO TO DTC CHART
A

2.

INSPECT TRANSMISSION VALVE BODY ASSEMBLY (SHIFT SOLENOID VALVE SLU)

(a) Disconnect the transmission wire connector from the shift solenoid valve SLU.

Click here

*1

Transmission Valve Body Assembly

*2

Shift Solenoid Valve SLU

*a

Component without harness connected

(Shift Solenoid Valve SLU)

-

-

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

OK:

Valve moves and makes an operating sound.

NG

GO TO STEP 5

OK

3.

REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

Click here

NEXT

4.

REPLACE TORQUE CONVERTER ASSEMBLY

Click here

NEXT

PERFORM REGISTRATION AND INITIALIZATION

for Registration: Click here

for Initialization: Click here

5.

REPLACE TRANSMISSION VALVE BODY ASSEMBLY

Click here

NEXT

PERFORM REGISTRATION AND INITIALIZATION

for Registration: Click here

for Initialization: Click here

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