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Home >> Infiniti >> 2003 >> QX4 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0101: Mass Airflow Sensor - Range/Performance Problem >> DTC Confirmation Test Malfunction "B" (Using Generic Scan Tool)
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DTC Confirmation Test Malfunction "B" (Using Generic Scan Tool)

NOTE: Use the following test to check overall function of MAF sensor circuit. During this test, 1st trip DTC may not be confirmed.

Start engine and warm to normal operating temperature. Using scan tool, select MODE 1. Observe MAF SENSOR signal. Increase engine speed to 4000 RPM. There should be a linear increase in MAF signal in response to engine speed increase. If operation is as specified, system is okay at this time. If operation is not as specified, go to DIAGNOSTIC PROCEDURE .

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