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Home >> Chevrolet >> 1997 >> Corvette Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System And Engine Component Tests >> Emission Systems & Sub-Systems >> Air Injection >> Electric AIR Pump Relay
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Electric AIR Pump Relay

  1. Start engine. With engine operating in open loop, electric air pump should run and air should be coming out of electric air pump exhaust port.
  2. If electric air pump is operating, allow engine to idle for at least 3 minutes. With vehicle in closed loop (or about 3 minutes after start), PCM should de-energize electric air pump relay and electric air pump should stop. If this does not occur, go to next step. If air pump operates as described, relay is functioning properly.
  3. Remove air pump relay from fuse/relay block. Air pump should stop. If air pump stops, check or replace faulty relay. If air pump does not stop, check circuit to air pump for a short to battery voltage.
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