BMW & Fiat
Turn ignition switch off and disconnect electrical connector at ECU and connect ohmmeter between terminals 6 and 27. Readings should be as follows. If not, replace temperature sensor and air flow meter as an assembly.
Temperature/Resistance Relationship (BMW & Fiat)
| Temperature | Resistance (Ohms) |
|---|---|
| 14°F (-10°C) | 8, 260-10, 560 |
| 68°F (20°C) | 2, 280-2, 720 |
| 122°F (50°C) | 760-970 |