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DTC P2871:00 [TCM (ET6A-EL, ET6AX-EL) (E)]

DTC P2871:00 [TCM (ET6A-EL, ET6AX-EL) (E)]

 id0502q95787r2

Outline

System malfunction location

Oil pump shift valve stuck off
Detection condition
•  Under the following conditions, oil pump shift valve stuck-off detected:
―  Engine is running.
―  Vehicle has been driven at specified gear.
―  ATF temperature is 20 °C {68 °F} or more.
―  There is no correlation between vehicle speed signal from DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid) and output shaft speed sensor signal.
―  Turbine/input shaft speed sensor and output shaft speed sensor DTC is not recorded.
Fail-safe
•  Inhibits malfunctioning gear.
Possible cause
•  ATF is less than specified value
•  Oil pump shift valve malfunction
•  Control valve body malfunction
System wiring diagram
•  Not applicable
Connector diagram
•  Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action
1
VERIFY DTC OUTPUT STATUS
•  Is the DTC P1738:00 also present?
Yes
Go to the applicable DTC inspection.
(See DTC P1738:00 [TCM (ET6A-EL, ET6AX-EL) (E)].)
No
Go to the next step.
2
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
•  Record the freeze frame data/snapshot data.
Note
•  Recording can be facilitated using the screen capture of the PC function.
—
Go to the next step.
3
INSPECT ATF LEVEL
•  Inspect the ATF level.
•  Is there any malfunction?
Yes
Adjust the ATF level to the specification, then go to the next step.
(See AUTOMATIC TRANSAXLE FLUID (ATF) ADJUSTMENT [ET6A-EL, ET6AX-EL (E)].)
No
Replace the control valve body, then go to the next step.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].)
4
PERFORM ON-BOARD DIAGNOSTIC TEST
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Start the engine.
2.  Verify that the ATF temperature is 55 °C {131 °F} or more.
•  Perform the on-board diagnostic test.
•  Is the same Pending DTC present?
Yes
ATF amount in Step 3 is correct:
•  Replace the automatic transaxle, then drive the vehicle to check it, and if there is no problem then the DTC troubleshooting is complete.
ATF amount adjusted in Step 3:
•  Replace the control valve body, then go to repair completion verification.
No
No DTCs are displayed:
•  Drive the vehicle to check it, and if there is no problem then the DTC troubleshooting is complete.
If a DTC other than the one indicated on the left is displayed:
•  Go to the applicable DTC inspection.
Repair completion verification
RE-PERFORM ON-BOARD DIAGNOSTIC TEST
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Start the engine.
2.  Verify that the ATF temperature is 55 °C {131 °F} or more.
•  Perform the on-board diagnostic test.
•  Are any DTCs present?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (E)].)
No
DTC troubleshooting completed.