Air Injection Pump Relay: Testing and Inspection

Air Pump Relay Testing:

1. Check for "click" from relay when turning ignition switch "ON/OFF."
2. Turn ignition "OFF." Unplug relay.
3. Apply battery voltage across terminals B and D. Check that continuity exists across terminals A and C.
4. Disconnect battery. Check that no continuity exists across terminals A and C.
5. If not as specified, replace relay.