Outside Temperature Sensor
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Mercedes-Benz ML55, 2001 Mercedes-Benz ML430, 2001 Mercedes-Benz ML320, 2000 Mercedes-Benz ML55, and 2000 Mercedes-Benz ML430. However, it is still accessible from the selected car via links, so may be relevant.
- Connect socket box to A/C push button control unit and wiring harness. See CONNECTING TEST EQUIPMENT . Turn ignition off. Connect ohmmeter positive lead to socket box terminal No. 12 and negative lead to terminal No. 3.
- Disconnect test cable from A/C push button control unit. See OUTSIDE TEMPERATURE SENSOR RESISTANCE table. If resistance is not as specified, check wiring harness between outside temperature sensor and A/C push button control unit. See WIRING DIAGRAMS . Repair as necessary. If wiring harness is okay, replace outside temperature sensor.
OUTSIDE TEMPERATURE SENSOR RESISTANCE
| Sensor Temperature - °F (°C) | Ohms |
|---|---|
| 68 (20) | 2100 |
| 77 (25) | 1700 |
| 104 (40) | 900 |
| 122 (50) | 600 |