AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0894 and P2714

DTC Code DTC Name
P0894 Transmission Component Slipping
P2714 Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT)

DESCRIPTION

C221301E07

Shift solenoid valve SLT controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and vehicle speed sensor. The ECM adjusts the current to shift solenoid valve SLT to control the hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P0894

Transmission Component Slipping

The ECM detects a malfunction in shift solenoid valve SLT, S1, S2, S3, S4 or SL2, or the 1-2 shift valve, or an incorrect gear 6 ratio according to the difference in speed of the turbine and output shaft, and also by the oil pressure (2-trip detection logic).

  • Shift solenoid valve SLT remains open or closed

  • Shift solenoid valve S1, S2, S3, S4 or SL2 remains open or closed

  • Gear 6 incorrect ratio (sequence valve) or 1-2 shift valve is stuck

  • Valve body is blocked

  • Automatic transmission (clutch, brake, gear, etc.)

Comes on

DTC stored

P2714

Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT)

The ECM detects a malfunction in shift solenoid valve SLT (ON side) according to the difference in speed of the turbine and output shaft, and also by the oil pressure (2-trip detection logic*1, 1-trip detection logic*2).

  • Shift solenoid valve SLT remains open or closed

  • Shift solenoid valve S1, S2, S3, S4 or SL2 remains open or closed

  • Gear 6 incorrect ratio (sequence valve) or 1-2 shift valve is stuck

  • Valve body is blocked

  • Automatic transmission (clutch, brake, gear, etc.)

Comes on (w/ OBD)

- (w/o OBD)

DTC stored

*1: w/ OBD

*2: w/o OBD

MONITOR DESCRIPTION

The ECM calculates the amount of heat absorbed by the friction material based on the difference in speed (clutch slippage) between the turbine and output shaft. The ECM illuminates the MIL and stores this DTC when the amount of heat absorption exceeds the specified value.

There are two causes of speed difference.

  • When shift solenoid valve SLT remains ON, oil pressure decreases, which causes the clutch engagement force to decrease.

  • When a shift solenoid valve remains ON or OFF, the gear position commanded by the ECM and the actual gear position are not the same.

Note:

If you continue driving under these conditions, the clutch will burn out and the vehicle will no longer be drivable.

PROCEDURE

  1. CHECK DTC OUTPUT (IN ADDITION TO DTCS P0894 AND P2714)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs using the tester.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      • Only P0894 is output

      • Only P0894 and P2714 are output

      A

      P0894, P2714 and other DTCs are output

      B
      Tip:

      If any other codes besides P0894 and P2714 are output, perform troubleshooting for those DTCs first.

    B

    GO TO DTC CHART

    Click here

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SHIFT SOLENOID VALVE SLT)

    Note:

    • Perform the test while the ATF temperature is between 50 and 80°C (122 and 176°F).

    • Be careful to prevent the hose of SST from interfering with the exhaust pipe.

    • Perform the test with the A/C off.

    Tip:

    Using the intelligent tester to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. C218462E02

      Remove the test plug from the transmission case and connect SST.

    2. Connect the intelligent tester to the DLC3.

    3. Start the engine and warm it up.

    4. Measure the line pressure with SST.

    5. Turn the intelligent tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test.

    7. According to the display on the tester, perform the Active Test.

    8. Measure the line pressure.

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Activate the Solenoid (SLT)

      Operate shift solenoid valve SLT and raise line pressure

      ON or OFF

      • HINT:

      • OFF: Line pressure up (when Active Test "Activate the Solenoid (SLT)" performed, ECM commands shift solenoid valve SLT to turn off)

      • ON: No action (normal operation)

      • [Vehicle Condition]

      • Vehicle stopped

      • Engine idling
      Tip:

      Activate the Solenoid (SLT) in the Active Test is performed to check the line pressure changes by connecting SST to the automatic transmission, which is used in the Hydraulic Test (Click here) as well. Note that the pressure values in the Active Test and Hydraulic Test are different.

      OK

      The line pressure changes as specified when performing the Active Test.

      Result

      Result

      OK

      NG

    09992-00095

    09992-00231

    09992-00271

    NG

    INSPECT SHIFT SOLENOID VALVE SLTClick here

    OK

  3. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (RUNNING TEST)

    CAUTION:

    This test should always be performed with at least 2 people.

    Note:

    • Perform the test while the ATF temperature is between 50 and 80°C (122 and 176°F).

    • Perform the test with the A/C turned off.

    Tip:

    Using the intelligent tester to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC.

      Click here

    3. Enter the following menus: Powertrain / Engine and ECT / Active Test.

    4. According to the display on the tester, perform the Active Test.

      Tip:

      While driving, the shift position can be forcibly changed with the intelligent tester.

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Control the Shift Position

      Operate shift solenoid valves and set each shift position

      • Press "→" button: Shift up

      • Press "←" button: Shift down

      Possible to check operation of the shift solenoid valves.

      [Vehicle Condition]

      50 km/h (30 mph) or less
      Tip:

      • This test can be conducted when the vehicle speed is 50 km/h (30 mph) or less.

      • The 4th to 5th and 5th to 6th up-shifts must be performed with the accelerator pedal released.

      • The 6th to 5th and 5th to 4th down-shifts must be performed with the accelerator pedal released.

      • Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.

      • The shift position commanded by the ECM is shown in the Data List display on the tester.

    5. Compare the ECM gear shift command and the actual gear position.

      Result

      ECM Gear Shift Command

      1st

      2nd

      3rd

      4th

      5th

      6th

      Proceed to

      Actual gear position under malfunction

      Shiftsolenoid S1 stuck ON*1

      2nd

      2nd

      3rd

      4th

      5th

      6th

      A

      Shiftsolenoid S1 stuck OFF

      1st

      1st

      3rd

      4th

      5th

      N*2

      Shiftsolenoid S2 stuck ON

      1st

      2nd

      2nd

      4th

      6th

      6th

      B

      Shiftsolenoid S2 stuck OFF

      3rd

      3rd

      3rd

      4th

      5th

      5th

      Shiftsolenoid S3 stuck ON

      1st

      2nd

      3rd

      3rd

      N*2

      N*2

      C

      Shiftsolenoid S3 stuck OFF

      3rd

      4th

      4th

      4th

      5th

      6th

      Shiftsolenoid S4 stuck ON*3

      1st

      2nd

      3rd

      4th

      5th

      6th

      D

      Shiftsolenoid S4 stuck OFF

      1st

      2nd

      3rd

      4th

      4th

      4th

      Actual gear position when normal

      1st

      2nd

      3rd

      4th

      5th

      6th

      E
      Tip:

      • *1: When shift solenoid S1 is stuck ON, the vehicle cannot drive in reverse.

      • *2: Neutral

      • *3: When shift solenoid S4 is stuck ON, gear shifting is normal.

    B

    INSPECT SHIFT SOLENOID VALVE S2Click here

    C

    INSPECT SHIFT SOLENOID VALVE S3Click here

    D

    INSPECT SHIFT SOLENOID VALVE S4Click here

    E

    INSPECT SHIFT SOLENOID VALVE SLTClick here

    A

  4. INSPECT SHIFT SOLENOID VALVE S1

    1. C209925C01

      *a

      Component without harness connected

      (Shift Solenoid Valve S1)

      Remove shift solenoid valve S1.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Shift solenoid valve S1 connector terminal - Shift solenoid valve S1 body

      20°C (68°F)

      11 to 15 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK

      Measurement Condition

      Specified Condition

      • Battery positive (+) → Shift solenoid valve S1 connector

      • Battery negative (-) → Shift solenoid valve S1 body

      Valve moves and makes an operating noise

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE S1

    Click here

    OK

  5. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

    1. Check the transmission valve body assembly.

      OK

      There are no foreign objects on each valve.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

    Click here

    OK

  6. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

    1. Check the torque converter clutch assembly.

      Click here

      OK

      The torque converter clutch operates normally.

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY

    Click here

    NG

    REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

    Click here

  7. INSPECT SHIFT SOLENOID VALVE SLT

    1. C209928C02

      *a

      Component without harness connected

      (Shift Solenoid Valve SLT)

      Remove shift solenoid valve SLT.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 - 2

      20°C (68°F)

      5.0 to 5.6 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK

      Measurement Condition

      Specified Condition

      • Battery positive (+) with a 21 W bulb → Terminal 2

      • Battery negative (-) → Terminal 1

      Valve moves and makes an operating noise

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE SLT

    Click here

    OK

  8. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

    1. Check the transmission valve body assembly.

      OK

      There are no foreign objects on each valve.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

    Click here

    OK

  9. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

    1. Check the torque converter clutch assembly.

      Click here

      OK

      The torque converter clutch operates normally.

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY

    Click here

    NG

    REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

    Click here

  10. INSPECT SHIFT SOLENOID VALVE S2

    1. C208650C01

      *a

      Component without harness connected

      (Shift Solenoid Valve S2)

      Remove shift solenoid valve S2.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Shift solenoid valve S2 connector terminal - Shift solenoid valve S2 body

      20°C (68°F)

      11 to 15 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK

      Measurement Condition

      Specified Condition

      • Battery positive (+) → Shift solenoid valve S2 connector

      • Battery negative (-) → Shift solenoid valve S2 body

      Valve moves and makes an operating noise

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE S2

    Click here

    OK

  11. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

    1. Check the transmission valve body assembly.

      OK

      There are no foreign objects on each valve.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

    Click here

    OK

  12. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

    1. Check the torque converter clutch assembly.

      Click here

      OK

      The torque converter clutch operates normally.

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY

    Click here

    NG

    REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

    Click here

  13. INSPECT SHIFT SOLENOID VALVE S3

    1. C209925C02

      *a

      Component without harness connected

      (Shift Solenoid Valve S3)

      Remove shift solenoid valve S3.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Shift solenoid valve S3 connector terminal - Shift solenoid valve S3 body

      20°C (68°F)

      11 to 15 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK

      Measurement Condition

      Specified Condition

      • Battery positive (+) → Shift solenoid valve S3 connector

      • Battery negative (-) → Shift solenoid valve S3 body

      Valve moves and makes an operating noise

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE S3

    Click here

    OK

  14. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

    1. Check the transmission valve body assembly.

      OK

      There are no foreign objects on each valve.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

    Click here

    OK

  15. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

    1. Check the torque converter clutch assembly.

      Click here

      OK

      The torque converter clutch operates normally.

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY

    Click here

    NG

    REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

    Click here

  16. INSPECT SHIFT SOLENOID VALVE S4

    1. C208651C01

      *a

      Component without harness connected

      (Shift Solenoid Valve S4)

      Remove shift solenoid valve S4.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      Shift solenoid valve S4 connector terminal - Shift solenoid valve S4 body

      20°C (68°F)

      11 to 15 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK

      Measurement Condition

      Specified Condition

      • Battery positive (+) → Shift solenoid valve S4 connector

      • Battery negative (-) → Shift solenoid valve S4 body

      Valve moves and makes an operating noise

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE S4

    Click here

    OK

  17. INSPECT SHIFT SOLENOID VALVE SL2

    1. C197715C02

      *a

      Component without harness connected

      (Shift Solenoid Valve SL2)

      Remove shift solenoid valve SL2.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 - 2

      20°C (68°F)

      5.0 to 5.6 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK

      Measurement Condition

      Specified Condition

      • Battery positive (+) with a 21 W bulb → Terminal 1

      • Battery negative (-) → Terminal 2

      Valve moves and makes an operating noise

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE SL2

    Click here

    OK

  18. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

    1. Check the transmission valve body assembly.

      OK

      There are no foreign objects on each valve.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

    Click here

    OK

  19. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

    1. Check the torque converter clutch assembly.

      Click here

      OK

      The torque converter clutch operates normally.

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY

    Click here

    NG

    REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

    Click here

  20. INSPECT SHIFT SOLENOID VALVE SLT

    1. C209928C02

      *a

      Component without harness connected

      (Shift Solenoid Valve SLT)

      Remove shift solenoid valve SLT.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 - 2

      20°C (68°F)

      5.0 to 5.6 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK

      Measurement Condition

      Specified Condition

      • Battery positive (+) with a 21 W bulb → Terminal 2

      • Battery negative (-) → Terminal 1

      Valve moves and makes an operating noise

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT SOLENOID VALVE SLT

    Click here

    OK

  21. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

    1. Check the transmission valve body assembly.

      OK

      There are no foreign objects on each valve.

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

    Click here

    OK

  22. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

    1. Check the torque converter clutch assembly.

      Click here

      OK

      The torque converter clutch operates normally.

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY

    Click here

    NG

    REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

    Click here