YES
Connect scantool to Data Link Cable (DLC).
Warm up engine to normal operating temperature.
Monitor that "Mass Air Flow Sensor" parameter on the scantool is changing without EGR actuator operation or with EGR actuator operation while idling engine speed.
Fig 1) Normal value without EGR actuator : Approx. 450 ~ 550 mg/stroke
Fig 2) Normal value with EGR actuator : Approx. 280 ~ 360 mg/stroke
4. Is the Current data displayed correctly ?
YES
▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification Vehicle Repair" procedure.
NO
▶ Go to "W/Harness Inspection" procedure.
