ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P2022 INTAKE MANIFOLD RUNNER POSITION SENSOR / SWITCH CIRCUIT HIGH (BANK 2)

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 Mode and Inspection Mode

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK CURRENT DATA.

1) Start the engine.

2) Read the data of tumble generator valve position sensor signal (LH) using Subaru Select Monitor or general scan tool.

NOTE:

• Subaru Select Monitor

For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”.

• General scan tool

For detailed operation procedure, refer to the general scan tool operation manual.

Is the voltage 5 V or more?

Even if the malfunction indicator light illuminates, 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 may be the cause.

2.CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE ASSEMBLY LH CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from tumble generator valve assembly LH.

3) Start the engine.

4) Read the data of tumble generator valve position sensor signal (LH) using Subaru Select Monitor or general scan tool.

NOTE:

• Subaru Select Monitor

For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”.

• General scan tool

For detailed operation procedures, refer to the general scan tool operation manual.

Is the voltage 5 V or more?

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

3.CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE ASSEMBLY LH CONNECTOR.

1) Turn the ignition switch to OFF.

2) Measure the resistance of harness between tumble generator valve assembly LH connector and engine ground.

Connector & terminal

(E51) No. 2 — Engine ground:

Is the resistance less than 5 Ω?

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit in harness between ECM and tumble generator valve assembly LH connector

• Poor contact in ECM connector

• Poor contact in coupling connector

4.CHECK POOR CONTACT.

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

Is there poor contact in the tumble generator valve assembly LH connector?

Repair the poor contact of tumble generator valve assembly LH connector.

Replace the tumble generator valve assembly LH.