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

DTC P2433 SECONDARY AIR INJECTION SYSTEM AIR FLOW /PRESSURE SENSOR CIRCUIT HIGH

DTC DETECTING CONDITION:

Immediately at fault recognition

CAUTION:

After repairing or replacing the defective part, perform the Clear Memory Mode and Inspection Mode .

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK CURRENT DATA.

1) Turn the ignition switch to ON.

2) Read the data of secondary air pipe pressure signal using the 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 measured value 133.3 kPa (1000 mmHg, 39.4 inHg) or more?

Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the fault condition, and reperform the check.

NOTE:

In this case, there may be a temporary connector contact failure.

2.CHECK HARNESS BETWEEN ECM AND SECONDARY AIR COMBINATION VALVE RH CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the secondary air combination valve RH.

3) Turn the ignition switch to ON.

4) Read the data of secondary air pipe pressure signal using the 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 measured value 133.3 kPa (1000 mmHg, 39.4 inHg) or more?

Repair the short circuit to power in the harness between ECM and secondary air combination valve RH connectors.

3.CHECK HARNESS BETWEEN ECM AND SECONDARY AIR COMBINATION VALVE RH CONNECTOR.

1) Turn the ignition switch to OFF.

2) Measure the resistance of the harness between the secondary air combination valve RH connector and engine ground.

Connector & terminal

(E41) No. 3 — 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 secondary air combination valve RH connector

• Poor contact in ECM connector

• Poor contact of coupling connector

4.CHECK FOR POOR CONTACT.

Check for poor contact of the secondary air combination valve RH connector.

Is there poor contact of the secondary air combination valve RH connector?

Repair the poor contact of the secondary air combination valve RH connector.

Replace the secondary air combination valve RH.