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

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

Poor driving performance

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM .

1. CHECK OUTPUT SIGNAL OF ECM. 
   1. Turn the ignition switch to ON.
   2. Measure the voltage between ECM 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.
2. 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.
   NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
3. 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.
4. CHECK HARNESS BETWEEN ECM AND WASTEGATE CONTROL SOLENOID VALVE CONNECTOR. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from the wastegate control solenoid valve.
   3. Disconnect the connector from ECM.
   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 and wastegate control solenoid valve connector.
5. CHECK HARNESS BETWEEN ECM AND WASTEGATE CONTROL SOLENOID VALVE CONNECTOR. 

   Measure the resistance of harness between ECM 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 and wastegate control solenoid valve connector.
6. 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. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Wastegate Control Solenoid Valve .