Motronic M 2.8.1 Quick Check F0: DATA LIST
| No. | TECH 1 Display | Conditions for Checking | Nominal Value | Trouble Codes | Terminal |
|---|---|---|---|---|---|
| 29 | SEC. AIR PUMP REL | Engine running at idle speed, cold | |||
| ACTIVE 0V | 46, 47 | 26, 19 | |||
| Engine running at idle speed, operating temperature | |||||
| (at coolant temperature above about 60 °C / 140 °F) | INACTIVE 12V | ||||
| Alternative check if engine is already warm: | |||||
| Engine warm | |||||
| Disconnect coolant temperature sensor P 30 |
Note:
| When the coolant temperature sensor is disconnected, the control unit is provided with a coolant temperature of - 35 °C / - 31 °F. This means that a trouble code is set when the engine is switched off. The trouble code must be deleted again (using TECH 1) the next time the engine is started and the coolant temperature sensor is connected. | ACTIVE 0V |