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DTC P0873:00 [TCM (ET6A-EL, ET6AX-EL) (E)]

DTC P0873:00 [TCM (ET6A-EL, ET6AX-EL) (E)]

 id0502q99048r2

Outline

System malfunction location

Oil pressure switch No.3 (Oil pressure switch A) stuck off
Detection condition
•  Under the following conditions, oil pressure switch No.3 stuck-off detected by combination of gear ratio malfunction and oil pressure switch pattern malfunction:
―  Engine is running.
―  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 learning control.
•  Inhibits manual mode.
•  Inhibits neutral idle control.
•  Inhibits i-stop control.
•  Inhibits AAS.
Possible cause
•  Oil pressure switch No.3 malfunction
•  TCM 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
VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
•  Verify related Service Bulletins, on-line repair information, or Service Information availability.
•  Is any related information available?
Yes
Perform repair or diagnosis according to the available information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
4
VERIFY THAT DTC IS PRESENT
•  Clear the DTC using the M-MDS.
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Start the engine.
2.  Verify that the ATF temperature is 20 °C {68 °F} or more.
•  Perform the DTC inspection using the M-MDS.
•  Is the same Pending DTC present?
Yes
Replace the oil pressure switch A, then go to repair completion verification.
(See OIL PRESSURE SWITCH REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].)
No
DTC troubleshooting completed.
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 20 °C {68 °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.