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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 35 (AUTOMATIC TRANSAXLE (DIAGNOSTICS))DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC P2728: PRESSURE CONTROL SOLENOID "E" CONTROL CIRCUIT RANGE/PERFORMANCENOTES
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans

DTC P2728: Pressure Control Solenoid "E" Control Circuit Range/Performance: Notes

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Notes
WARNING: This page is about a different car, the 2022 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

1. - 

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

  • Acceleration is poor during standing start.
  • Shift control malfunction
  • Engine speed increases abruptly.

Wiring diagram: 

CVT control system Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>CVT CONTROL SYSTEM .

G13617846Courtesy of SUBARU OF AMERICA, INC.
CAUTION:
  1. CHECK DTC  .

    Read the DTC of [Transmission] using the Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS) (CROSSTREK MODEL)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Besides DTC P2728, is DTC P2729 or P2730 displayed?

    Yes  Perform the diagnosis according to DTCs other than P2728. Ref. to TRANSMISSION (DIAGNOSTICS) (CROSSTREK MODEL)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

    No  Go to  2.

  2. CHECK SECONDARY SOLENOID (ACTIVE TEST)  .
    1. Turn the ignition switch to ON.
    2. Using the Subaru Select Monitor, perform the active test for secondary solenoid. Ref. to TRANSMISSION (DIAGNOSTICS) (CROSSTREK MODEL)>ACTIVE TEST .

    Is 300 → 500 → 700 mA indicated at the active test, and does [Secondary Actual Current] follow [Secondary Set Current]?

    Yes  Go to  3.

    No  Go to  4.

  3. CHECK FOR POOR CONTACT  .

    Check for poor contact of harness and connector between TCM and secondary solenoid.

    Is there poor contact?

    Yes  Repair the poor contact of harness and connector.

    No  Recheck the poor contact of harness and connector. Replace the TCM if no fault is found, Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 CROSSTREK)>TRANSMISSION CONTROL MODULE (TCM) .

  4. CHECK SECONDARY SOLENOID  .
    1. Turn the ignition switch to OFF.
    2. Disconnect the TCM connector.
    3. Measure the resistance between TCM connector and transmission body.

    Connector & terminal 

    (T10) No. 46 - Transmission body:

    Is the resistance approximately 3.3 - 7.3 Ω? (When cold)

    Yes  Replace the control valve body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 CROSSTREK)>CONTROL VALVE BODY .

    No  Repair or replace the harness.

RENDER: 1.0x

NO RELATED

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