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

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

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling
Engine stalls.
Poor driving performance

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Clear Memory Mode . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Inspection Mode .
Use the check board when measuring the ECM terminal voltage and resistance.

Wiring diagram:

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

Fig 1: Engine Electrical System Wiring Diagram (TGV Position Sensor Circuit High Bank 2)

Courtesy of SUBARU OF AMERICA, INC.

CHECK CURRENT DATA .
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 the Data Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Subaru Select Monitor>OPERATION>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.
  NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE ACTUATOR LH CONNECTOR .
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 the Data Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Subaru Select Monitor>OPERATION>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.
CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE ACTUATOR LH CONNECTOR .
1. Turn the ignition switch to OFF.
2. Measure the resistance of harness between tumble generator valve actuator LH connector and engine ground.
Connector & 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
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)>Tumble Generator Valve Actuator .