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 No. 1. See Fig 1 and Fig 2 . Voltmeter should read as specified. See AIRFLOW METER VOLTAGE SPECIFICATIONS table.

Fig 1: Airflow Meter Terminal ID
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Airflow Meter Connector ID
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

Q45

Approx. 0.2

1.0-1.4

⁽¹⁾	Engine at full operating temperature.

⁽²⁾	Engine off.