DTC P2022: TGV Position Sensor/Switch Circuit High Bank 2: Notes

1. - 

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

• Improper idling
• Engine stall
• Poor driving performance

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM (IMPREZA MODEL)>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .

• IMPREZA MODEL

Courtesy of SUBARU OF AMERICA, INC.

• CROSSTREK MODEL

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DATA MONITOR  .
   1. Start the engine.
   2. Using the Subaru Select Monitor, read the value in [TGV Position Sensor L].
   NOTE: For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (DIAG)>DATA MONITOR .

   Is the value of [TGV Position Sensor L] 5 V or more?

   Yes:  Go to  2.

   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.
2. CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE ACTUATOR LH  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from tumble generator valve actuator LH.
   3. Start the engine.
   4. Using the Subaru Select Monitor, read the value in [TGV Position Sensor L].
   NOTE: For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (DIAG)>DATA MONITOR .

   Is the value of [TGV Position Sensor L] 5 V or more?

   Yes:  Repair the short circuit to power in harness between ECM connector and tumble generator valve actuator LH connector.

   No:  Go to  3.

3. CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE ACTUATOR LH (OPEN)  .
   1. Turn the ignition switch to OFF.
   2. Measure the resistance of harness between tumble generator valve actuator LH connector and engine ground.

   Connector and terminal 

   (E51) No. 2 - Engine ground:

   Is the resistance less than 5 Ω?

   Yes:  Go to  4.

   No:  Repair the harness and connector.

   NOTE: In this case, repair the following item:

   • Open circuit in harness between ECM connector and tumble generator valve actuator LH connector
   • Poor contact of ECM connector
4. CHECK FOR POOR CONTACT  .

   Check for poor contact of tumble generator valve actuator LH connector.

   Is there poor contact of the tumble generator valve actuator LH connector?

   Yes:  Repair the poor contact of tumble generator valve actuator LH connector.

   No:  Replace the tumble generator valve actuator LH. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (EXCEPT FOR HEV))>TUMBLE GENERATOR VALVE ACTUATOR .

   NOTE: The tumble generator valve actuator cannot be disassembled.