Air Flow Meter/Sensor: Testing and Inspection

Testing Air Flow Meter:

1. Remove rubber boot from air flow sensor connector.
2. Check terminal voltages as follows:

TERMINAL

B/Y (Power supply)
G/O (Burn-off)
G/B (Air flow mass)
G/Y (Ground)
B/O (Ground)

IGNITION ON

B/Y - Approx. 12V
G/O - 0V
G/B - 1.0 - 2.0V
G/Y - Approx. 0V
B/O - Approx. 0V

ENGINE RUNNING

B/Y - Approx. 12V
G/O - 0V
G/B - 1.9 - 5.0V
G/Y - Approx. 0V
B/O - Approx. 0V

3. If not as specified, check wiring harness for an open or short circuit. If harness is okay, check burn-off operation.
4. If burn-off operation is as specified, replace airflow sensor.