DTC P0245: Turbocharger/Supercharger WASTEGATE Solenoid "A" Low: Notes

WARNING: This page is about a different variant/trim than selected.

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Poor driving performance

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Refer to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>CLEAR MEMORY MODE>OPERATION , and inspection mode Refer to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>INSPECTION MODE>PROCEDURE ..
Use the check board when measuring the ECM terminal voltage and resistance.

Wiring diagram:

Engine Electrical System Refer to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CHECK OUTPUT SIGNAL OF ECM.
1. Turn the ignition switch to ON.
2. Measure the voltage between ECM connector and engine ground.
  Connector & terminal
  
  (E159) No. 11 (+) - Engine ground (-):
Is the voltage 10 V or more?

Yes: Go to 2.

No: Go to 3.
CHECK FOR POOR CONTACT.
Check for poor contact of ECM connector.

Is there poor contact of ECM connector?

Yes: Repair the poor contact of ECM connector.

No: Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK POWER SUPPLY TO WASTEGATE CONTROL SOLENOID VALVE.
Measure the voltage between wastegate control solenoid valve connector and engine ground.

Connector & terminal

(E64) No. 1 (+) - Engine ground (-):

Is the voltage 10 V or more?

Yes: Go to 4.

No: Repair the power supply circuit.
CHECK HARNESS BETWEEN ECM AND WASTEGATE CONTROL SOLENOID VALVE CONNECTOR.
1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Disconnect the connector from the wastegate control solenoid valve.
4. Measure the resistance between wastegate control solenoid valve connector and engine ground.
  Connector & terminal
  
  (E64) No. 2 - Engine ground:
Is the resistance 1 MΩ or more?

Yes: Go to 5.

No: Repair ground short circuit of harness between ECM connector and wastegate control solenoid valve connector.
CHECK HARNESS BETWEEN ECM AND WASTEGATE CONTROL SOLENOID VALVE CONNECTOR.
Measure the resistance of harness between ECM connector and wastegate control solenoid valve connector.

Connector & terminal

(E159) No. 11 - (E64) No. 2:

Is the resistance less than 1 Ω?

Yes: Go to 6.

No: Repair open circuit in harness between ECM connector and wastegate control solenoid valve connector.
CHECK WASTEGATE CONTROL SOLENOID VALVE.
1. Remove the wastegate control solenoid valve.
2. Measure the resistance between wastegate control solenoid valve terminals.
  Terminals
  
  No. 1 - No. 2:
Is the resistance 10 - 100 Ω?

Yes: Repair poor contact of wastegate control solenoid valve connector.

No: Replace the wastegate control solenoid valve. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>WASTEGATE CONTROL SOLENOID VALVE .