P2714
U340E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM (for Hatchback): P2714: Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT)
P2714 - Pressure Control Solenoid "D" Performance (Shift Solenoid Valve SLT)
DESCRIPTION
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 ECM adjusts the current to shift solenoid valve SLT to control the hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.
MONITOR DESCRIPTION
In any forward position, when the difference between the revolutions of the turbine and output shaft exceeds the specified value (varies with 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.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
The following conditions are common to ON malfunctions (a), (b), (c) and (d).
ON malfunction (a):
ON malfunction (b):
ON malfunction (c):
ON malfunction (d):
TYPICAL MALFUNCTION THRESHOLDS
[ON malfunction]
- Detection condition: Total accumulated time of ON malfunctions (a), (b), (c) and (d) is 1 second or more
ON malfunction (a):
ON malfunction (b):
ON malfunction (c):
ON malfunction (d):
INSPECTION PROCEDURE
NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
1. ACTIVE TEST
HINT
Using the Techstream 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.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test.
(g) In accordance with the display on the Techstream, perform the Active Test.
*: Activate the Solenoid (SLT) in the Active Test is performed to check the line pressure changes by connecting SST to the automatic transaxle, which is used in the Hydraulic Test Data List / Active Test (from 07/2011) as well.
HINT
The pressure values in Active Test and Hydraulic Test are different from each other.
PROCEDURE
1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P2714)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs using the Techstream.
Result
HINT
If any other DTCs besides P2714 are output, perform troubleshooting for those DTCs first.
B -- GO TO DTC CHART Automatic Transaxle System (for Hatchback) - U340E
A -- Continue to next step.
2. INSPECT SHIFT SOLENOID VALVE SLT
(a) Remove shift solenoid valve SLT.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.
OK:
The solenoid makes operating sounds.
Text in Illustration
NG -- REPLACE SHIFT SOLENOID VALVE SLT Disassembly (from 07/2011)
OK -- Continue to next step.
3. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0751
NG -- REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal (from 07/2011)
OK -- Continue to next step.
4. INSPECT TORQUE CONVERTER ASSEMBLY
(a) Check the torque converter assembly Testing and Inspection.
OK:
The torque converter operates normally.
NG -- REPLACE TORQUE CONVERTER ASSEMBLY Removal (from 07/2011)
OK -- REPLACE AUTOMATIC TRANSAXLE ASSEMBLY Removal (from 07/2011)