Air Injection Pump: Testing and Inspection

System Operation
1. Start the engine.
2. Increase the engine speed to above 3250 rpm and verify that the air pump magnetic clutch switches OFF (releases).




Magnetic Clutch Inspection
1. Connect the special service tool (SST) (Engine Signal Monitor Adaptor Harness) to the powertrain control module engine (PCME).
2. Turn ignition switch ON.
3. Short the PCME terminal 2J and verify that the magnetic clutch is OFF (released).
4. If the magnetic clutch does not turn OFF, check the air pump relay.
5. If the relay is OK, disconnect the air pump connector and check the continuity.
6. If not as specified, replace the air pump.




Continuity Inspection
1. Disconnect the air pump connector.
2. Check for continuity between terminals.
3. If no continuity, replace the air pump.

SST-49 2113 011B:

Pressure Inspection
1. Disconnect air hose (from air control valve to air pump) at the air control valve.
2. Connect the SST to the air hose.
3. Start the engine and run it at idle.
4. Measure the pressure.

Pressure: More than 4.9 kPa (0.7 psi)

5. If not as specified, replace the air pump.