AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0894, P2714

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

DESCRIPTION

A01FI6JE01

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. DTC Detection Condition Trouble Area
P0894 ECM detects a malfunction on SLT, S1, S2, S3, S4, SL2, gear 6 incorrect ratio (sequence valve) or 1-2 shift solenoid valve according to the revolution difference of the turbine and the 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.)
P2714 ECM detects a malfunction on SLT (ON side) according to the revolution difference of the turbine and the 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.)

MONITOR DESCRIPTION

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

There are two reasons that make the revolution difference.


Note

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

INSPECTION PROCEDURE

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) position and push the GTS main switch ON.

    3. When you use GTS:

      Select the item "Powertrain / Engine and ECT / Trouble Codes".

    4. Read the DTCs using the GTS.

      Result
      Display (DTC output) Proceed to

      • Only P0894 is output

      • Only P0894 and P2714 are output

      		 A
      P0894, P2714 and other DTCs are output B

      Tech Tips

      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 GTS (SHIFT SOLENOID VALVE SLT)

    Note


    • Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C (122 to 176°F)

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

    • This check must be conducted after checking and adjusting engine.

    • Perform under condition that A/C is OFF.

    Tech Tips

    Using the GTS to perform Active Test 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 Test early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Test.


    1. Turn the engine switch off.

    2. Lift the vehicle up.

    3. A01FEXZE01

      Remove the test plug on the transmission case center right side and connect SST.

      SST
      09992-00095   ( 09992-00231, 09992-00271 )

    4. Lower the vehicle.

    5. Fully apply the parking brake and chock the 4 wheels.

    6. Connect the GTS to the DLC3.

    7. Start the engine.

    8. Warm up the ATF (Automatic Transmission Fluid).

    9. Measure the line pressure when the engine is idling.

    10. Turn the GTS on.

    11. Select the item "Powertrain / Engine and ECT / Active Test".

    12. According to the display on the GTS, perform the "Active Test".

    13. Measure the line pressure with SST.

      Item Test Details
      Activate the Solenoid (SLT)*

      [Test Details]

      Operate the shift solenoid SLT and raise the line pressure.

      [Vehicle Condition]


      • Vehicle Stopped.

      • IDL: ON

      Tech Tips

      OFF: Line pressure up (When the active test of "Activate the Solenoid (SLT)" is performed, the ECM commands the SLT solenoid to turn off).

      ON: No action (normal operation)

      *: "Activate the Solenoid (SLT)" in the Active Test is performed to check the line pressure changes by connecting the SST to the automatic transmission, which is used in the HYDRAULIC TEST Click here as well.

      Tech Tips

      The pressure values in Active Test and HYDRAULIC TEST are different from each other.

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

    NG

    INSPECT SHIFT SOLENOID VALVE SLT Click here

    OK

  3. PERFORM ACTIVE TEST USING GTS (RUNNING TEST)

    Tech Tips

    Using the GTS to perform Active Test 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 Test early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Test.


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG) position.

    5. Turn the GTS on.

    6. Select the item "Powertrain / Engine and ECT / Active Test".

    7. According to the display on the GTS, perform the "Active Test".

      Tech Tips

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

      Comparing the shift position commanded by the Active Test with the actual shift position enables you to confirm the problem Click here.

      Item Test Details Diagnostic Note
      Control the Shift Position

      [Test Details]

      Operate the shift solenoid valve and set the each shift position by yourself.

      [Vehicle Condition]


      • IDL: ON (4th, 5th and 6th)

      • Less than 50 km/h (31 mph)

      [Others]


      • Press "→" button: Shift up

      • Press "←" button: Shift down

      		 Possible to check the operation of the shift solenoid valves.

      Tech Tips


      • This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.

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

      • The 6th to 5th and 5th to 4th down-shiftings 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 (Shift Status) display on the GTS.

    8. 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 Shift solenoid S1 Stuck ON*1 2nd 2nd 3rd 4th 5th 6th A
      Stuck OFF 1st 1st 3rd 4th 5th N*2
      Shift solenoid S2 Stuck ON 1st 2nd 2nd 4th 6th 6th B
      Stuck OFF 3rd 3rd 3rd 4th 5th 5th
      Shift solenoid S3 Stuck ON 1st 2nd 3rd 3rd N*2 N*2 C
      Stuck OFF 3rd 4th 4th 4th 5th 6th
      Shift solenoid S4 Stuck ON*3 1st 2nd 3rd 4th 5th 6th D
      Stuck OFF 1st 2nd 3rd 4th 4th 4th
      Actual gear position when normal 1st 2nd 3rd 4th 5th 6th E

      Tech Tips


      • *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

    Click here

    C

    Click here

    D

    Click here

    E

    INSPECT SHIFT SOLENOID VALVE SLT Click here

    A

  4. INSPECT SHIFT SOLENOID VALVE S1


    1. A01FDJME01
      Text in Illustration
      *1 Shift Solenoid Valve S1

      Remove the shift solenoid valve S1.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      Solenoid Connector (S1) - Solenoid Body (S1) 11 to 15 Ω

    3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE S1 Click here

    OK

  5. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There are no foreign objects on each valve.

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  6. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Check the torque converter assembly Click here.

      OK
      The torque converter assembly operates normally.

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE AUTOMATIC W/TRANSFER TRANSMISSION ASSEMBLY Click here

  7. INSPECT SHIFT SOLENOID VALVE SLT


    1. A01FDHVE09
      Text in Illustration
      *1 Shift Solenoid Valve SLT

      Remove the shift solenoid valve SLT.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      1 - 2 5.0 to 5.6 Ω

    3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SLT Click here

    OK

  8. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There are no foreign objects on each valve.

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  9. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Check the torque converter assembly Click here.

      OK
      The torque converter assembly operates normally.

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE AUTOMATIC W/TRANSFER TRANSMISSION ASSEMBLY Click here

  10. INSPECT SHIFT SOLENOID VALVE S2


    1. A01FH2ME01
      Text in Illustration
      *1 Shift Solenoid Valve S2

      Remove the shift solenoid valve S2.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      Solenoid Connector (S2) - Solenoid Body (S2) 11 to 15 Ω

    3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE S2 Click here

    OK

  11. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There are no foreign objects on each valve.

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  12. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Check the torque converter assembly Click here.

      OK
      The torque converter assembly operates normally.

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE AUTOMATIC W/TRANSFER TRANSMISSION ASSEMBLY Click here

  13. INSPECT SHIFT SOLENOID VALVE S3


    1. A01FDJME01
      Text in Illustration
      *1 Shift Solenoid Valve S3

      Remove the shift solenoid valve S3.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      Solenoid Connector (S3) - Solenoid Body (S3) 11 to 15 Ω

    3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE S3 Click here

    OK

  14. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There are no foreign objects on each valve.

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  15. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Check the torque converter assembly Click here.

      OK
      The torque converter assembly operates normally.

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE AUTOMATIC W/TRANSFER TRANSMISSION ASSEMBLY Click here

  16. INSPECT SHIFT SOLENOID VALVE S4


    1. A01FFM0E01
      Text in Illustration
      *1 Shift Solenoid Valve S4

      Remove the shift solenoid valve S4.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      Solenoid Connector (S4) - Solenoid Body (S4) 11 to 15 Ω

    3. Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE S4 Click here

    OK

  17. INSPECT SHIFT SOLENOID VALVE SL2


    1. A01FI7WE01
      Text in Illustration
      *1 Shift Solenoid Valve SL2

      Remove the shift solenoid valve SL2.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      1 - 2 5.0 to 5.6 Ω

    3. Connect the positive (+) lead with a 21 W bulb to terminal 1 and the negative (-) lead to terminal 2 of the solenoid valve connector, then check the movement of the valve.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SL2 Click here

    OK

  18. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There are no foreign objects on each valve.

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  19. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Check the torque converter assembly Click here.

      OK
      The torque converter assembly operates normally.

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE AUTOMATIC W/TRANSFER TRANSMISSION ASSEMBLY Click here

  20. INSPECT SHIFT SOLENOID VALVE SLT


    1. A01FDHVE09
      Text in Illustration
      *1 Shift Solenoid Valve SLT

      Remove the shift solenoid valve SLT.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      1 - 2 5.0 to 5.6 Ω

    3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SLT Click here

    OK

  21. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly Click here.

      OK
      There are no foreign objects on each valve.

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

  22. INSPECT TORQUE CONVERTER ASSEMBLY


    1. Check the torque converter assembly Click here.

      OK
      The torque converter assembly operates normally.

    NG

    REPLACE TORQUE CONVERTER ASSEMBLY Click here

    OK

    REPAIR OR REPLACE AUTOMATIC W/TRANSFER TRANSMISSION ASSEMBLY Click here