P2714
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0894, P2714: Transmission Component Slipping
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 speed (clutch slippage) between the turbine and output shaft. The ECM illuminates the MIL and stores this DTC when the amount of heat absorption exceeds the specified value.
There are two causes of speed difference.
- When the shift solenoid valve SLT remains ON, oil pressure decreases, which causes the clutch engagement force to decrease.
- When a shift solenoid valve remains ON or OFF, the gear position commanded by the ECM and the actual gear position are not the same.
NOTICE:
If you continue driving 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
[P0894: ON malfunction]
- When either condition below is met: ON malfunction (A) or (B)
ON Malfunction (A)
ON Malfunction (B)
[P2714: ON malfunction]
- One of the following conditions is met: ON malfunction (A), (B), (C), (D), (E), (F), (G) or (H)
ON Malfunction (A)
ON Malfunction (B)
ON Malfunction (C)
ON Malfunction (D)
ON Malfunction (E)
ON Malfunction (F)
ON Malfunction (G)
ON Malfunction (H)
INSPECTION PROCEDURE
NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
PROCEDURE
1. CHECK DTC OUTPUT (IN ADDITION TO DTCS P0894 AND 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 codes besides P0894 and P2714 are output, perform troubleshooting for those DTCs first.
B -- GO TO DTC CHART Automatic Transmission System - A760E
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (SHIFT SOLENOID VALVE SLT) P0729
NG -- INSPECT SHIFT SOLENOID VALVE SLT
OK -- Continue to next step.
3. PERFORM ACTIVE TEST USING TECHSTREAM (RUNNING 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) Connect the Techstream to the DLC3.
(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(c) Enter the following menus: Powertrain / Engine and ECT / Active Test.
(d) 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 50 km/h (30 mph) or less.
* The 4th to 5th and 5th to 6th up-shifts must be performed with the accelerator pedal released.
* The 6th to 5th and 5th to 4th down-shifts 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 display on the Techstream.
(e) Compare the ECM gear shift command and the actual gear position.
Result
HINT
* *1: When shift solenoid S1 is stuck ON, the vehicle cannot drive in reverse.
* *2: Neutral
* *3: When shift solenoid S4 is stuck ON, gear shifting is normal.
B -- INSPECT SHIFT SOLENOID VALVE S2
C -- INSPECT SHIFT SOLENOID VALVE S3
D -- INSPECT SHIFT SOLENOID VALVE S4
E -- INSPECT SHIFT SOLENOID VALVE SLT
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 P0751
NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.
6. 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
OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal
7. INSPECT SHIFT SOLENOID VALVE S2 P0756
NG -- REPLACE SHIFT SOLENOID VALVE S2 Disassembly
OK -- Continue to next step.
8. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0751
NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.
9. 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
OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal
10. INSPECT SHIFT SOLENOID VALVE S3 P0761
NG -- REPLACE SHIFT SOLENOID VALVE S3 Disassembly
OK -- Continue to next step.
11. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0751
NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.
12. 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
OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal
13. INSPECT SHIFT SOLENOID VALVE S4 P0766
NG -- REPLACE SHIFT SOLENOID VALVE S4 Disassembly
OK -- Continue to next step.
14. INSPECT SHIFT SOLENOID VALVE SL2 P0766
NG -- REPLACE SHIFT SOLENOID VALVE SL2 Disassembly
OK -- Continue to next step.
15. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0751
NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.
16. 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
OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal
17. 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) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.
OK:
Text in Illustration
NG -- REPLACE SHIFT SOLENOID VALVE SLT Disassembly
OK -- Continue to next step.
18. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0751
NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.
19. 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
OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal
20. 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) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.
OK:
Text in Illustration
NG -- REPLACE SHIFT SOLENOID VALVE SLT Disassembly
OK -- Continue to next step.
21. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0751
NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.
22. 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
OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal