LEMON Manuals: Even more car manuals for everyone
Home >> Oldsmobile >> 1991 >> Cutlass Supreme Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Air Injection (C-6) >> Electric Air Pump Relay (3.4L Man. Trans.)

Electric Air Pump Relay (3.4L Man. Trans.)

  1. Start engine. With engine fuel system operating in open loop, electric air pump should run and air should be routed through the EADV to the exhaust manifolds. Air pump should also run with ALDL "test" terminal "B" grounded with engine running.
  2. If electric air pump is operating, allow engine to idle for at least 3 minutes. With vehicle in closed loop (or approximately 3 minutes after start), ECM should de-energize electric air pump relay and electric air pump should stop. If this does not occur, go to step 3). If air pump functions as described, relay is functioning properly.
  3. Disconnect relay connector. Relay is located in right side electrical center. Connect ohmmeter across Orange wire terminals of relay. Apply battery voltage to Brown/White wire terminal of relay. Apply ground to Pink/Black wire terminal of relay.
  4. Continuity should exist between Orange wire terminals of relay ONLY with relay energized. If relay does not test as indicated, replace relay.
scientia non olet · About LEMON Manuals