P2714

A750E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: 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

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.

There are two reasons that make the revolution difference.

- When the shift solenoid valve SLT remains on, oil pressure goes down and clutch engagement force decreases.

- When the shift solenoid valve remains on or off, the gear position commanded by the ECM and the actual gear position are not the same.

NOTE: If driving continues under these conditions, the clutch will burn out and the vehicle will no longer be drivable.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

All

TYPICAL MALFUNCTION THRESHOLDS

[P2714: ON malfunction]

- When one of following conditions is met: ON malfunction (A), (B), (C), (D), (E), (F) or (G)

ON malfunction (A)

ON malfunction (B)

ON malfunction (C)

ON malfunction (D)

ON malfunction (E)

ON malfunction (F)

ON malfunction (G)

INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

PROCEDURE

1. CHECK ANY 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 codes besides P2714 are output, perform troubleshooting for those DTCs first.

B -- GO TO DTC CHART Automatic Transmission System - A750E
A -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVE THE SOLENOID (SLT)) P0746

NG -- INSPECT SHIFT SOLENOID VALVE SLT
OK -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE SHIFT POSITION)

CAUTION:
This test should always be performed with at least 2 people.

NOTICE:
* Perform the test at the normal operating ATF temperature: 50 to 80°C (122 to 176°F).
* Perform the test with the A/C turned off.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

HINT
While driving, the shift position can be forcibly changed with the Techstream.

Engine and ECT

HINT
* This test can be conducted when the vehicle speed is 30 mph (50 km/h) or less.
* The 4th to 5th up-shift must be performed with the accelerator pedal released.
* The 5th to 4th down-shift must be performed with the accelerator pedal released.
* Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
* The shift position commanded by the ECM is shown in the Data List / Shift Status display on the Techstream.

(f) Compare the ECM gear shift command and the actual gear position.

Result

HINT
* *1: Neutral
* *2: When shift solenoid S2 is stuck ON, the vehicle cannot drive in reverse.
* *3: When shift solenoid S2 is stuck OFF, the 4th to 5th up-shift will have a large shift shock. Also the 5th to 4th down-shift will have time lag.
* *4: Stuck ON condition can be determined by checking if shift shock has increased excessively.
* *5: When shift solenoid SR is stuck OFF, moving the shift lever from N to D will cause a large shift shock.
* Gear shift can be determined by paying attention to changes in rpm.

E -- INSPECT SHIFT SOLENOID VALVE SLT

D -- INSPECT SHIFT SOLENOID VALVE SR

C -- INSPECT SHIFT SOLENOID VALVE SL2

B -- INSPECT SHIFT SOLENOID VALVE S2
A -- Continue to next step.

4. INSPECT SHIFT SOLENOID VALVE S1 P0751

NG -- REPLACE SHIFT SOLENOID VALVE S1 Disassembly
OK -- Continue to next step.

5. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0746

NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.

6. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Check the torque converter clutch assembly Testing and Inspection.

OK:

The torque converter clutch operates normally.

NG -- REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY Removal

OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal

7. INSPECT SHIFT SOLENOID VALVE SLT

(a) Remove the shift solenoid valve SLT.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

(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.

NG -- REPLACE SHIFT SOLENOID VALVE SLT Disassembly
OK -- Continue to next step.

8. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0746

NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.

9. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Check the torque converter clutch assembly Testing and Inspection.

OK:

The torque converter clutch operates normally.

NG -- REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY Removal

OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal

10. INSPECT SHIFT SOLENOID VALVE S2 P0756

NG -- REPLACE SHIFT SOLENOID VALVE S2 Disassembly
OK -- Continue to next step.

11. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0746

NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.

12. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Check the torque converter clutch assembly Testing and Inspection.

OK:

The torque converter clutch operates normally.

NG -- REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY Removal

OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal

13. INSPECT SHIFT SOLENOID VALVE SL2 P0776

NG -- REPLACE SHIFT SOLENOID VALVE SL2 Disassembly
OK -- Continue to next step.

14. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0746

NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.

15. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Check the torque converter clutch assembly Testing and Inspection.

OK:

The torque converter clutch operates normally.

NG -- REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY Removal

OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal

16. INSPECT SHIFT SOLENOID VALVE SR P0746

NG -- REPLACE SHIFT SOLENOID VALVE SR Disassembly
OK -- Continue to next step.

17. INSPECT SHIFT SOLENOID VALVE SL1 P0746

NG -- REPLACE SHIFT SOLENOID VALVE SL1 Disassembly
OK -- Continue to next step.

18. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0746

NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.

19. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Check the torque converter clutch assembly Testing and Inspection.

OK:

The torque converter clutch operates normally.

NG -- REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY Removal

OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal

20. INSPECT SHIFT SOLENOID VALVE SLT

(a) Remove the shift solenoid valve SLT.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration