Airflow Meter/Sensor Inspection
- Pull rubber boot back from airflow sensor connector. Check terminal voltages. See Fig 1 . See AIRFLOW SENSOR TERMINAL VOLTAGES table.
- If voltages are not correct, check wiring for open or short. If wiring is okay, check burn-off operation. If ECU control of burn-off operation is okay, and voltages are still incorrect, replace airflow sensor.
AIRFLOW SENSOR TERMINAL VOLTAGES
| Terminal Wire Color | Volts - Ignition ON | Volts - Engine Running |
|---|---|---|
| Black/Yellow (Power Supply) | 12 | 12 |
| Green/Orange (Burn-Off) | 0 | 0 |
| Green/Black (Airflow Mass) | 1.0-2.0 | 1.9-5.0 |
| Green/Yellow (Ground) | About 0 | About 0 |
| Black/Orange (Ground) | About 0 | About 0 |