P2714

DTC 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 ECM adjusts the duty cycle 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 period of continuity in one cycle. For example, if A is the period of continuity in one cycle, and B is the period of non-continuity, then Duty Ratio = A/(A+B) x 100 (%)

DTC DETECTION CONDITION:

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 turns on 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.

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

MONITOR STRATEGY:

TYPICAL ENABLING CONDITIONS:

TYPICAL MALFUNCTION THRESHOLDS:

1. ACTIVE TEST

HINT:
Performing the ACTIVE TEST using the intelligent tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time.

It is possible to display the DATA LIST during the ACTIVE TEST.
a. Warm up the engine.
b. Turn the engine switch off.
c. Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
d. Turn the engine switch on (IG) position.
e. Turn on the tester.
f. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST".

g. According to the display on the tester, perform the "ACTIVE TEST".





"LINE PRESS 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 as well.

HINT:
^ The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.
^ Normally, the line pressure detected in the ACTIVE TEST is approximately half of the value detected in the HYDRAULIC TEST's stall test.

INSPECTION PROCEDURE

Step 1:

Step 1 (Continued)-3:

Steps 4-5:

Steps 6-8: