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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System (UA80F) - Diagnostic Codes (2 Of 2) & Symptom Tests >> Automatic Transaxle System >> DTC P2756-7F: Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck Off [12/2019 - 10/2022] >> Typical Enabling Conditions

Typical Enabling Conditions

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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 515 kPa (5.3 kgf/cm2 , 75 psi) or more
- when A/C on 515 kPa (5.3 kgf/cm2 , 75 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 2000 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)
Calculated input torque 0.0 N*m (0.0 N*m (0 kgf*cm, 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: 

  1. 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:

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
  1. Any of the following conditions are met: Condition (a) or (b)
    1. 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
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