AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P2714

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

SYSTEM DESCRIPTION

The linear solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and the vehicle speed sensor. The TCM adjusts the duty ratio* of the SLT solenoid valve to control hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.

*: Duty Ratio

The duty ratio is the ratio of the electrical current on time (A) to the total of the electrical current on and off time (A + B).

Duty Ratio (%) = (A / (A + B)) x 100

A01CDBXE01
DTC No. DTC Detection Condition Trouble Area
P2714 The ECM detects a malfunction in the shift solenoid valve SLT (ON side) according to the difference in the speed between the turbine and the output shaft, and also by the transmission fluid pressure. (2-trip detection logic)

  • Shift solenoid valve SLT remains open

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

  • Valve body is blocked

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

MONITOR DESCRIPTION

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

When shift solenoid valve SLT remains on, the line pressure goes down and clutch engagement force decreases.

Note

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

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC 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 / ECT / Trouble Codes.

    5. Read the DTCs using the intelligent tester.

      Result
      Display (DTC Output) Proceed to
      Only "P2714" is output A
      "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 detected.


    A

    INSPECT SHIFT SOLENOID VALVE SLT Click here

    B

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (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 sure to prevent SST hose from interfering with the exhaust pipe.

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

    • Perform the test with the A/C OFF.

    Tech Tips

    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. Turn the engine switch off.

    2. Lift the vehicle up.

    3. A01CBRZE01

      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 intelligent tester to the DLC3.

    7. Start the engine.

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

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

    10. Turn the intelligent tester on.

    11. Enter the following menus: Powertrain / ECT / Active Test.

    12. Follow the instructions on the tester and perform the Active Test.

    13. Measure the line pressure with SST.

      Item Test Details
      Activate the Solenoid (SLT)*

      [Test Details]

      Operates shift solenoid SLT to raise the line pressure.

      [Vehicle Condition]


      • Vehicle Stopped

      • IDL: ON

      Tech Tips

      ON: No action (normal operation)

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

      *: "Activate the Solenoid (SLT)" in the Active Test is performed to check that the line pressure changes by connecting the SST to the automatic transaxle. The same SST 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 INTELLIGENT TESTER (SHIFTING TEST)

    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 intelligent tester to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the intelligent tester on.

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

    7. According to the display on the intelligent tester, 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.

      Item Test Details Diagnostic Note
      Control the Shift Position

      [Test Details]

      Operates the shift solenoid valves to allow gears to selected manually.

      [Others]


      • Press "→" button: Upshift occurs

      • Press "←" button: Downshift occurs

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

      Note


      • This test can be conducted when the vehicle is stopped.

      • When shifting gears using the Active Test function, 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 intelligent tester.

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

      Tech Tips

      Because the torque converter clutch has not engaged, it may be difficult to obtain the speeds specified in 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 7.5 mph) 15 to 19 km/h (9.3 to 11.8 mph) 21 to 25 km/h (13.0 to 15.5 mph) 31 to 35 km/h (19.3 to 21.7 mph) 44 to 48 km/h (27.3 to 29.8 mph) 52 to 56 km/h (32.3 to 34.8 mph)

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

      Result
      Actuator Gear during Malfunction TCM Commanded Gear Proceed to
      1st 2nd 3rd 4th 5th 6th
      Shift solenoid SL1 Stuck ON 1st 2nd 3rd 4th 4th 4th A
      Stuck OFF N*1 N*1 N*1 N*1 5th 6th
      Shift solenoid SL2 Stuck ON 4th 4th 4th 4th 5th 6th B
      Stuck OFF 1st 2nd 3rd 1st N*1 N*1
      Shift solenoid SL3 Stuck ON 2nd 2nd 3rd 4th 5th 6th C
      Stuck OFF 1st 1st 3rd 4th 5th N*1
      Shift solenoid SL4 Stuck ON*3 3rd 3rd 3rd 4th 5th 5th D
      Stuck OFF 1st 2nd 1st 4th N*1 6th
      Shift solenoid 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 shift solenoid SLT is stuck on, the line pressure will be low. Therefore, the amount of torque that can be transmitted by each gear is lower than the normal limit. When the engine power exceeds this lowered limit, the engine speed will increase freely.

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


    A

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL1) PERFORMANCE DTC P0746) Click here

    B

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL2) PERFORMANCE DTC P0776) Click here

    C

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL3) PERFORMANCE DTC P0796) Click here

    D

    GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL4) PERFORMANCE DTC P2808) Click here

    E

  4. INSPECT SHIFT SOLENOID VALVE SLT


    1. A01CGF5E08

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

      OK
      Valve moves and makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SLT 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 and they operate smoothly.

    NG

    REPLACE TRANSMISSION VALVE BODY ASSEMBLY Click here

    OK

    REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Click here