Air Injection Control Valve: Testing and Inspection

NOTE: The air control valve (ACV) contains two separate valves within one control body.
- Switching Valve
- Air Relief Valve

SWITCHING VALVE
Operational Inspection

SST-49 F018 902:

1. Connect the special service tool (SST) (Engine Signal Monitor Adapter Harness) to the powertrain control module engine (PCME) as shown.
2. Start the engine and run it at idle.




3. Short the PCME terminal 4N and verify that the engine condition changes (idles rough).
4. If the engine condition does not change, check the following below:
- Vacuum tube (Inspect the vacuum line fitting, connections and components for leaks)
- Secondary air switching valve
- Air relief valve
- Air pump
- Air pump relay

Vacuum Inspection
1. Remove the air control valve. (Refer to Removal/ Installation below).




2. Connect a vacuum pump to port A.




3. Verify that the switching valve opens at a vacuum of 14.7 kPa (110 mmHg, 4.3 inHg).

CAUTION
- Applying vacuum greater than 66.7 kPa (500 mmHg, 19.7 inHg) can damage the air control valve.

4. If not as specified, replace air control valve.

AIR RELIEF VALVE
Operational Inspection

SST-49 F018 902:

1. Connect the special service tool (SST) (Engine Signal Monitor Adaptor Harness) to the PCME as shown.
2. Start the engine and run it at idle.




3. Verify that air does not flow from air relief valve.
4. Short the PCME terminal 3P and verify that the air flows from air relief valve.
5. If the air does not flow, check the following items below:
- Vacuum tube, (Inspect the vacuum line fitting, connections and components for leaks)
- Secondary air bypass valve
- Air pump
- Air pump relay

Vacuum Inspection
1. Remove the air control valve. (Refer to Removal/ Installation below).




2. Connect a vacuum pump to port A.




3. Verify that the air relief valve opens at a vacuum of 19.3 kPa (145 mmHg, 5.7 inHg).

CAUTION
- Applying vacuum greater than 66.7 kPa (500 mmHg, 19.7 inHg) can damage the air control valve.

4. If not as specified, replace air control valve.

Removal/Installation
1. Remove the extension manifold.
2. Remove in the order shown in the figure below.
3. Install in the reverse order of removal.




1. Solenoid valve (Turbo control)
2. Air control valve
3. Gasket
4. Check valve (Port air)
5. Solenoid valve (Port air bypass)
6. Solenoid valve (Split air bypass)
7. Solenoid valve (Relief2)