AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P2714

DTC Code DTC Name
P2714 Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT)

SYSTEM DESCRIPTION

The 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 TCM adjusts the current to the shift solenoid valve SLT to control 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 MIL Memory
P2714 Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT)

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. ATF temperature is -10°C (14°F) or more, and the vehicle is being driven with the shift lever in D (no malfunctions are detected in the shift solenoid valves (SL1, SL2, SL3, SL4 and SLT), transmission revolution sensor (NT, NC), coolant temperature sensor, oil temperature sensor, knock control sensor, electronic throttle, or CAN2)

  2. The difference in speed detected by the input speed sensor NT and output speed sensor NC is higher than normal in each gear.

  3. 2 seconds

  4. 2-trip detection logic

  • Shift solenoid valve SLT remains open

  • Shift solenoid valve SL1, SL2, SL3 or SL4 remains open or closed

  • Transmission valve body assembly is blocked

  • Automatic transaxle assembly (clutch, brake, gear, etc.)

 Comes on DTC stored

MONITOR DESCRIPTION

The TCM calculates the amount of clutch slip based on the turbine speed, output shaft speed, and gear ratio. If the amount of clutch slip exceeds a specified level, the TCM will illuminate the MIL and store this DTC.

If the shift solenoid valve SLT is stuck on, the line pressure and clutch engagement force will decrease.

Note

If driving continues under these conditions, clutches will burn out and the vehicle will no longer be drivable.

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

Click here

Tech Tips

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Perform the D Position Shift Test inspection in Road Test.

    Click here

  2. Turn the engine switch off.

  3. Perform step (1) again.

  4. Check for DTCs again.

    Click here

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / ECT / Trouble Codes.


      Powertrain > ECT > Trouble Codes

    5. Read the DTCs using the GTS.

      Result
      Result Proceed to
      Only DTC P2714 is output A
      DTC P2714 and other DTCs are output B

      Tech Tips

      If a solenoid is stuck ON, DTCs for several solenoids including the malfunctioning solenoid will be stored.


    B

    PERFORM ACTIVE TEST USING GTS (ACTIVATE THE SOLENOID (SLT)) Click here

    A

  2. INSPECT SHIFT SOLENOID VALVE SLT


    1. B006L78C02
      *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 Condition Specified Condition
      1 - 2 20°C (68°F) 5.0 to 5.6 Ω

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

      OK
      Valve moves and makes an operating sound.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SHIFT SOLENOID VALVE SLT Click here

    OK

  3. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Check the transmission valve body assembly.

      Click here

      OK
      There is no foreign matter on each valve and they operate smoothly.
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY Click here

    NG

    REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

  4. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE SOLENOID (SLT))

    Note


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

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

    • This test must be performed after checking and adjusting the engine.

    • Perform the test with the air conditioning off.

    Tech Tips

    Using the GTS 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. Turn the engine switch off.

    2. Lift the vehicle.

    3. A01UFAPE01

      Remove the test plug on the front left side of the transaxle case and install SST.

      SST
      09993-19015   ( 09993-00010, 09993-00040 )

    4. Lower the vehicle.

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

      Tech Tips

      When the electric parking brake switch (combination switch assembly) is pulled to the lock side 2 times (2 lock operations), the maximum amount of braking force is applied.

    6. Connect the GTS to the DLC3.

    7. Start the engine.

    8. Warm up the ATF.

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

    10. Turn the GTS on.

    11. Enter the following menus: Powertrain / ECT / Active Test / Activate the Solenoid (SLT).

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

    13. Measure the line pressure with SST.


      Powertrain > ECT > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Activate the Solenoid (SLT) Operates shift solenoid valve SLT to raise the line pressure

      ON/OFF

      Tech Tips

      ON: No action (normal operation)

      OFF: Line pressure increases (When the Active Test of "Activate the Solenoid (SLT)" is performed, the TCM commands the shift solenoid valve SLT to turn off).

        [Vehicle Condition]

      • Vehicle Stopped

      • IDL: ON

      Powertrain > ECT > Active Test
      Tester Display
      Activate the Solenoid (SLT)

      Tech Tips


      • The pressure values measured performing this Active Test and the Hydraulic Test are different from each other.

      • Performing the Active Test "Activate the Solenoid (SLT)" allows the change in line pressure to be checked with SST installed to the automatic transaxle. The same SST is used for the Hydraulic Test.

        Click here

      OK
      The line pressure changes as specified when performing the Active Test.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 2 Click here

    OK

  5. PERFORM ACTIVE TEST USING GTS (CONTROL THE SHIFT POSITION)

    Note

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


    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).

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / ECT / Active Test / Control the Shift Position.

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

      Tech Tips

      Comparing the gear commanded by the Active Test with the actual gear enables confirmation of the problem.

      Click here


      Powertrain > ECT > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Control the Shift Position Operates the shift solenoid valves to allow gears to be selected manually.

      • Press "→" button: Upshift occurs

      • Press "←" button: Downshift occurs

      Can be used to check the operation of the shift solenoid valves.

      Upshifts and downshifts should be performed consecutively. A 10-second interval is required between gear changes.

      Do not downshift at high speeds. Doing so will damage the automatic transaxle.


        [Vehicle Condition]

      • 50 km/h (31 mph) or less

      Powertrain > ECT > Active Test
      Tester Display
      Control the Shift Position

      Note


      • This Active Test can be performed when the vehicle is stopped.

      • When shifting gears using the Active Test, do not operate the accelerator pedal for 2 seconds before and after shifting gears.

      Tech Tips

      The gear commanded by the TCM is shown in the Data List / Shift Status display on the GTS.

    8. Check the vehicle speed and gear when the engine speed is 1000 rpm.

      Tech Tips

      As the torque converter clutch has not engaged, it may be difficult to obtain the speeds specified for 4th, 5th, and 6th gear, however a difference of speed should still be evident following each gear change.

      Standard
      1st 2nd 3rd 4th 5th 6th

      8 to 12 km/h

      (5 to 7 mph)

      15 to 19 km/h

      (9 to 12 mph)

      21 to 25 km/h

      (13 to 16 mph)

      31 to 35 km/h

      (19 to 22 mph)

      44 to 48 km/h

      (27 to 30 mph)

      52 to 56 km/h

      (32 to 35 mph)

    9. Compare the TCM commanded gear and the actual gear.

      Result
      Actual Gear during Malfunction TCM Commanded Gear Proceed to
      1st 2nd 3rd 4th 5th 6th
      Shift solenoid valve SL1 Stuck ON 1st 2nd 3rd 4th 4th 4th A
      Stuck OFF N*1 N*1 N*1 N*1 5th 6th
      Shift solenoid valve SL2 Stuck ON 4th 4th 4th 4th 5th 6th B
      Stuck OFF 1st 2nd 3rd 1st N*1 N*1
      Shift solenoid valve SL3 Stuck ON 2nd 2nd 3rd 4th 5th 6th C
      Stuck OFF 1st 1st 3rd 4th 5th N*1
      Shift solenoid valve SL4 Stuck ON 3rd 3rd 3rd 4th 5th 5th D
      Stuck OFF 1st 2nd 1st 4th N*1 6th
      Shift solenoid valve SLT Stuck ON N*2 N*2 N*2 N*2 N*2 N*2 E
      Stuck OFF*3 1st 2nd 3rd 4th 5th 6th

      Tech Tips


      • *1: Neutral

      • *2: If the shift solenoid valve SLT is stuck on, the line pressure will be low. Therefore, the amount of torque that can be transmitted by each gear will be lower than the normal limit. When the engine power exceeds this limit, the engine speed will increase freely.

      • *3: When the shift solenoid valve SLT is stuck off, gear shifting will be normal.


    A

    GO TO DTC CHART (DTC P0746) Click here

    B

    GO TO DTC CHART (DTC P0776) Click here

    C

    GO TO DTC CHART (DTC P0796) Click here

    D

    GO TO DTC CHART (DTC P2808) Click here

    E

    GO TO STEP 2 Click here