Ethanol sensor: Connection
Ethanol Sensor Pin Identification
| Pin | Signal Type | Description |
|---|---|---|
| 1 | Ground | Sensor ground to grounding point G7 via J40 |
| 2 | Square wave with varying frequency | The sensor's signal to the ECM, the square wave's frequency varies with the current ethanol content in the fuel. |
| 3 | Power supply +15 | Sensor voltage supply +15 from fuse 8 in 342 |