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

The shift solenoid valve SLT is controlled by the duty ratio as determined in advance by the transmission control computer, based upon signals from the accelerator position sensor, input speed sensor NT and output speed sensor SP2. In this way, the line pressure is adjusted to match the throttle valve opening angle and engine output. The TCM uses the revolution signals from the input speed sensor NT and output speed sensor SP2 to detect clutch and other slipping.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0894

  1. While driving with the shift lever in D, the ATF temperature 10°C or more, and coolant temperature 40°C or more. (However, abnormalities with the shift solenoid valve (S1, S2, S3, S4, SR, SL1, SL2, SLT), input speed sensor NT, output speed sensor SP2, park/neutral position switch, CAN bus, ECM communication, coolant temperature sensor, air flow sensor, electronically control throttle, and accelerator pedal sensor are not detected)

  2. The C1 clutch total heating power is the predetermined value or more.

  3. -

  4. 2-trip detection logic

  • Shift solenoid valve SLT

  • Valve body assembly

  • Torque converter clutch assembly

  • Automatic transmission
P2714

  1. While driving with the shift lever in D, the ATF temperature 10°C or more, and coolant temperature 40°C or more. (However, abnormalities with the shift solenoid valve (S1, S2, S3, S4, SR, SL1, SL2, SLT), input speed sensor NT, output speed sensor SP2, park/neutral position switch, CAN bus, ECM communication, coolant temperature sensor, air flow sensor, electronically control throttle, and accelerator pedal sensor are not detected)

  2. The following conditions are met:


    1. The C1 clutch total heating power is the predetermined value or more.

    2. The C2 clutch total heating power is the predetermined value or more.

  3. -

  4. 2-trip detection logic

  • Shift solenoid valve S1, S2, S3, S4, SLT

  • Valve body assembly

  • Torque converter clutch assembly

  • Automatic transmission

MONITOR DESCRIPTION

The TCM 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 TCM illuminates the MIL and outputs this DTC when the amount of heat absorption exceeds the specified value.

Note

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

WIRING DIAGRAM

A004I87E02

CAUTION / NOTICE / HINT

Note

Perform the universal trip to clear permanent DTCs Click here.

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and push the GTS main switch ON.

    3. Read the DTCs using the GTS Click here.

      Result
      Display (DTC output) Proceed to
      Only "P0894 and P2714" or "P0894" is output A
      "P0894 and P2714" or "P0894" and other DTCs are output B

    B

    GO TO DTC CHART Click here

    A

  2. HYDRAULIC TEST

    A004JY3E03
    Text in Illustration
    *1 SST *2 Test Plug

    Note


    • Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 60 to 90°C (140 to 194°F)

    • The line pressure test should always be carried out in pairs. One technician should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is performing the test.

    • 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.

    • When conducting stall test, do not continue more than 5 seconds.


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

    2. Lift the vehicle up.

    3. 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 check the 4 wheels.

    6. Start the engine and check idling speed.

    7. Keep your left foot pressing firmly on the brake pedal and shift into D position.

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

    9. Depress the accelerator pedal all the way down. Quickly read the highest line pressure when engine speed reaches stall speed.

    10. In the same manner, do the test in R position.

      Specified line pressure:
      Condition

      D position kPa (kgf / cm2, psi)

      R position kPa (kgf / cm2, psi)
      Idling

      350 to 430 kPa

      (3.6 to 4.4 kgf/cm2, 51 to 62 psi)

      760 to 950 kPa

      (7.7 to 9.7 kgf/cm2, 110 to 138 psi)
      Stall test

      1200 to 1380 kPa

      (12.5 to 14.0 kgf/cm2, 174 to 200 psi)

      1410 to 1630 kPa

      (14.4 to 16.6 kgf/cm2, 204 to 236 psi)

    NG

    INSPECT SHIFT SOLENOID VALVE SLT Click here

    OK

  3. CHECK THE GEAR POSITION


    1. Drive the vehicle with shift lever in the M.

    2. Check the shift position.

      Tech Tips


      • Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 60 to 90°C (140 to 194°F)

      • Perform under condition that A/C is OFF.

        OK
        Gear position changes.
      TCM gear shift command 1st 2nd 3rd 4th 5th 6th Proceed to
      Actual gear position under malfunction Shift solenoid S1 Stuck ON 2nd 2nd 3rd 4th 5th 6th A
      Stuck OFF 1st 2nd 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*1 N*1 C
      Stuck OFF 3rd 6th 4th 4th 5th 6th
      Shift solenoid S4 Stuck ON*2 1st 2nd 3rd 4th 5th 6th D
      Stuck OFF 1st 2nd 3rd 4th 4th 4th E
      Normal 1st 2nd 3rd 4th 5th 6th D

      Tech Tips


      • *1: Neutral

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


    B

    INSPECT SHIFT SOLENOID VALVE S2 Click here

    C

    INSPECT SHIFT SOLENOID VALVE S3 Click here

    D

    INSPECT SHIFT SOLENOID VALVE SLT Click here

    E

    INSPECT SHIFT SOLENOID VALVE S4 Click here

    A

  4. INSPECT SHIFT SOLENOID VALVE S1


    1. Remove the shift solenoid valve S1 Click here.

    2. Perform inspection of the shift solenoid valve S1 Click here.


    OK

    INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here

    NG

    REPLACE SHIFT SOLENOID VALVE S1 Click here

  5. INSPECT SHIFT SOLENOID VALVE S2


    1. Remove the shift solenoid valve S2 Click here.

    2. Perform inspection of the shift solenoid valve S2 Click here.


    OK

    INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here

    NG

    REPLACE SHIFT SOLENOID VALVE S2 Click here

  6. INSPECT SHIFT SOLENOID VALVE S3


    1. Remove the shift solenoid valve S3 Click here.

    2. Perform inspection of the shift solenoid valve S3 Click here.


    OK

    INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here

    NG

    REPLACE SHIFT SOLENOID VALVE S3 Click here

  7. INSPECT SHIFT SOLENOID VALVE S4


    1. Remove the shift solenoid valve S4 Click here.

    2. Perform inspection of the shift solenoid valve S4 Click here.


    OK

    INSPECT TRANSMISSION VALVE BODY ASSEMBLY Click here

    NG

    REPLACE SHIFT SOLENOID VALVE S4 Click here

  8. INSPECT SHIFT SOLENOID VALVE SLT


    1. Remove the shift solenoid valve SLT Click here.

    2. Perform inspection of the shift solenoid valve SLT Click here.


    NG

    REPLACE SHIFT SOLENOID VALVE SLT Click here

    OK

  9. 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

  10. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY


    1. Check the torque converter clutch assembly Click here.

      OK
      The torque converter clutch operates normally.

    OK

    REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Click here

    NG

    REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY Click here