Circuit Description
The shift solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation based on signal from the throttle position sensor and the vehicle speed sensor. The engine control module (ECM) 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.
In any forward position, when the difference between the revolutions of the turbine, intermediate and output shaft exceeds the specified value (varies with intermediate, output speed) determined by the ECM, the ECM illuminates the MIL and stores the DTC.
When shift solenoid valve SLT remains ON, the oil pressure goes down and the clutch engagement force decreases.
Important: If driving under these conditions continues, the clutch will burn out and the vehicle will no longer be drivable.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P2714 Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT)
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
The ECM detects a malfunction on SLT (ON side) according to the revolution difference of the turbine, intermediate, output shaft and also by the oil pressure.
Action Taken When the DTC Sets
| • | DTC P2714 is a type C DTC. |
| • | The malfunction indicator lamp (MIL) illuminates the first time the diagnostic runs with the fault active. |
Conditions for Clearing the MIL/DTC
The DTC will clear when conditions for setting the DTC have been repaired.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Automatic Transmission Controls Schematics Connector End View Reference: Component Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Is the resistance measured within specified value and does the solenoid make an operating sound? | 5 to 5.6 Ohms | Go to Step 3 | Go to Step 5 |
3 | Inspect transmission valve body assembly for foreign objects and each valve operates smoothly. Is transmission valve body operation OK? | -- | Go to Step 4 | Go to Step 6 |
4 | Inspect torque converter clutch assembly for normal operation. Is torque converter clutch operation OK? | -- | Go to Step 8 | Go to Step 7 |
5 | Replace the shift solenoid valve SLT. Did you complete the replacement? | -- | Go to Step 8 | -- |
6 | Replace the transmission valve body assembly. Did you complete the replacement? | -- | Go to Step 8 | -- |
7 | Replace the torque converter clutch assembly. Did you complete the replacement? | -- | Go to Step 8 | -- |
8 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
