Monitor Scantool Data

Connect scantool to Data Link Connector (DLC).
Warm up the engine to normal operating temperature.
Monitor the "MASS AIR FLOW" parameter on scantool.
1. Specification
  1. Approx. 900 mV at IG KEY: ON & Engine: OFF
  2. Approx. 1,300~1,500 mV at idle (no load)
  3. Approx. 1,700~1,800 mV at 2000 RPM (no load)
    
    Fig 1: Scantool Screen Display - Mass Air Flow Parameter
Is the sensor's signal near the specified value?
YES
1. Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector.
2. Fault was repaired and ECM memory was not cleared.
3. If the problem works out, Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
1. Go to "Inspection & Repair" procedure.