GSIC - Global Service Information Center

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

## for Preparation Click here

## DESCRIPTION

The throttle pressure that is applied to the primary regulator valve (which modulates the line pressure) causes the solenoid valve SLT, under electronic control, to precisely modulate and generate the line pressure according to the extent that the accelerator pedal is depressed or the output of engine power.
This controls the line pressure and provides smooth shifting characteristics.
Upon receiving a signal of the throttle valve opening angle, the ECM controls the line pressure by sending a predetermined duty ratio* to the solenoid valve, modulating the line pressure and generating throttle pressure.

HINT:

  *: The duty ratio is the ratio of the current ON time (A) to the total of the current ON and OFF time (A + B).

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

DTC No. | DTC Detection Condition | Trouble Area

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. Shift solenoid valve SLT remains open or closed
2. Valve body is blocked
3. Automatic transmission (clutch, brake or 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.
When the shift solenoid valve SLT remains ON, oil pressure goes down and clutch engagement force decreases.

NOTICE:

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

## WIRING DIAGRAM

## INSPECTION PROCEDURE

HINT:

  Performing the intelligent tester's Active Test allows relay, Vacuum Switching Valve (VSV), actuator and other item values to be operated without removing any parts. Performing the Active Test early in troubleshooting is one way to save time. The Data List can be displayed during the Active Test.

1. Warm up the engine.
2. Turn the ignition switch OFF.
3. Connect the intelligent tester to the DLC3.
4. Turn the ignition switch ON and push the tester main switch ON.
5. Enter the following menus: Powertrain / Engine and ECT / Active Test.
6. Follow the instructions on the tester and read the Active Test.

Item | Test Details | Diagnostic Note

Control the Line Pressure Up*

[Test Details]
Operate shift solenoid SLT and raise line pressure
[Vehicle Condition]

1. Vehicle stopped
2. IDL: ON

HINT:

  OFF: Line pressure up (when Active Test of "LINE PRESS UP" is performed, ECM commands SLT solenoid to turn OFF)

  ON: No action (normal operation)

-

*: "Control the Line Pressure Up" 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. Please note that the pressure values in the Active Test and Hydraulic Test are different.

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

1. Connect the intelligent tester to the DLC3.

1. Turn the ignition switch ON and push the intelligent tester main switch ON.

1. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

1. Read the DTCs using the intelligent tester.

   Result:

     Display (DTC output) | Proceed to
     Only P2714 is output | A
     P2714 and other DTCs | B

   HINT:
     If any other codes besides P2714 are output, perform troubleshooting for those DTCs first.

| B |

GO TO DTC CHART

A |

2.INSPECT SHIFT SOLENOID VALVE SLT

1. Remove the shift solenoid valve SLT.

1. Measure the resistance of the solenoid valve.

   Standard resistance:
     5.0 to 5.6 Ωat 20°C (68°F)

1. Connect the battery's positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

   OK:
     Solenoid makes operating noise.

| NG |

REPLACE SHIFT SOLENOID VALVE SLT

OK |

3.INSPECT TRANSMISSION VALVE BODY ASSEMBLY

OK:
  There are no foreign objects on each valve.

| NG |

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

OK |

4.INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

OK:
  The torque converter clutch operates normally.

| NG |

REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

OK |

REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY