Airflow Sensor: Notes
- Pull rubber boot back from airflow sensor connector. Backprobe sensor connector, and 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. See BURN-OFF OPERATION procedure. If ECU control of burn-off operation is okay but voltages are still incorrect, replace airflow sensor.
AIRFLOW SENSOR TERMINAL VOLTAGES
| Terminal Wire Color | Ignition On Volts | Engine Running Volts |
|---|---|---|
| Black/Yellow (Power Supply) | 12.0 | 12.0 |
| Green/Orange (Burn-Off) | 0 | 0 |
| Green/Black (Airflow Mass) | 1.0-2.0 | 1.9-5.0 |
| Green/Yellow (Ground) | 0 | 0 |
| Black/Orange (Ground) | 0 | 0 |