Airflow Meter

Ensure there is no dust or foreign material in air passage. Fold back airflow meter harness connector boot. Turn ignition on. Connect negative lead of voltmeter to ground. Using positive lead, backprobe airflow meter terminal "A". See Fig 1 - Fig 3 . Voltmeter should read as specified. See AIRFLOW METER VOLTAGE SPECIFICATIONS table.

Fig 1: Identifying Airflow Meter Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Identifying Airflow Meter Connector (G20)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Identifying Airflow Meter Connector (M30 & Q45)
Courtesy of NISSAN MOTOR CO., U.S.A.
Start engine and allow to warm to operating temperature. Recheck voltage reading. Voltmeter should read as specified. See AIRFLOW METER VOLTAGE SPECIFICATIONS table. Faults in airflow meter circuit should set a Code 12. If Code 12 is present, refer to TESTS W/CODES article in the ENGINE PERFORMANCE Section.

AIRFLOW METER VOLTAGE SPECIFICATIONS ⁽¹⁾

Application

⁽²⁾ Key On Volts

Engine Running Volts

G20

0.2-0.5

1.3-1.7

M30

Less Than 0.5

1.0-1.3

⁽¹⁾	Engine at full operating temperature.

⁽²⁾	Engine off.