AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P27137F

DTC Code DTC Name
P27137F Pressure Control Solenoid "D" Actuator Stuck Off

SYSTEM DESCRIPTION

The solenoid (SLT) valve 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 the solenoid (SLT) valve to control the primary regulator valve which adjust the line pressure. Appropriate line pressure assures smooth shifting with varying engine outputs.

A01VXNPE01
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P27137F Pressure Control Solenoid "D" Actuator Stuck Off

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


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

  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

  • Solenoid (SLT) valve remains open

  • Solenoid (SL1, SL2, SL3 and SL4) valves remains open or closed

  • Transmission valve body assembly is blocked

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

 Comes on DTC stored

SAE Code:

P2714

MONITOR DESCRIPTION

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

If the solenoid (SLT) valve is stuck ON, the line pressure and clutch engagement force will decrease.

Note

If driving continues under these conditions, the 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 P27137F)


    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 / Transmission / Trouble Codes.


      Powertrain > Transmission > Trouble Codes

    5. Read the DTCs using the GTS.

      Result
      Result Proceed to
      Only DTC P27137F is output A
      DTC P27137F and other DTCs are output B

      Tech Tips

      If a solenoid valve is stuck ON or OFF, DTCs for several solenoid valves including the malfunctioning solenoid valve will be stored.


    B

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

    A

  2. INSPECT SOLENOID (SLT) VALVE


    1. A01VVIWC14
      *1 Solenoid (SLT) Valve

      Remove the solenoid (SLT) valve.

      Click here

    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 with a 21 W bulb from the battery to terminal 1 and a negative (-) lead to terminal 2 of the 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 SOLENOID (SLT) VALVE Click here

    OK

  3. INSPECT TRANSMISSION VALVE BODY ASSEMBLY


    1. Inspect 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

    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 confirming that the engine is normal.

    • Perform the test with the air conditioning off.

    • Perform this test with the AUTO function (shift-linked function) of the electronic parking brake system off.

      Click here

    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. A01VXEJN01

      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 assembly is pulled 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 (Automatic Transmission Fluid).

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

    10. Turn the GTS on.

    11. Enter the following menus: Powertrain / Transmission / 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 > Transmission > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Activate the Solenoid (SLT) Operates the solenoid (SLT) valve to raise the line pressure

      ON/OFF

      Tech Tips

      ON: No action (normal operation)

      OFF: Line pressure increases (When performed, the ECM commands the solenoid (SLT) valve to turn off).

        [Vehicle Condition]

      • Vehicle stopped

      • Engine idling

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

      Tech Tips


      • 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

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

      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 / Transmission / 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 > Transmission > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Control the Shift Position Operates the solenoid valves to allow gears to be selected manually

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

      Start/Stop

      Can be used to check the operation of the 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 > Transmission > 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 ECM 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 ECM commanded gear and the actual gear.

      Result
      Actual Gear during Malfunction ECM Commanded Gear Proceed to
      1st 2nd 3rd 4th 5th 6th
      Solenoid (SL1) valve Stuck ON 1st 2nd 3rd 4th 4th 4th A
      Stuck OFF N*1 N*1 N*1 N*1 5th 6th
      Solenoid (SL2) valve Stuck ON 4th 4th 4th 4th 5th 6th B
      Stuck OFF 1st 2nd 3rd 1st N*1 N*1
      Solenoid (SL3) valve Stuck ON 2nd 2nd 3rd 4th 5th 6th C
      Stuck OFF 1st 1st 3rd 4th 5th N*1
      Solenoid (SL4) valve Stuck ON 3rd 3rd 3rd 4th 5th 5th D
      Stuck OFF 1st 2nd 1st 4th N*1 6th
      Solenoid (SLT) valve 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 solenoid (SLT) valve 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 solenoid (SLT) valve is stuck OFF, gear shifting will be normal.


    A

    GO TO DTC CHART (DTC P07457F) Click here

    B

    GO TO DTC CHART (DTC P07757F) Click here

    C

    GO TO DTC CHART (DTC P07957F) Click here

    D

    GO TO DTC CHART (DTC P28077F) Click here

    E

    GO TO STEP 2 Click here