| 1 | Temperature Selector Wheel - Right | Check the connection of the black component plug PIN 21 to the right temperature selector wheel. Also check that there is at least approx. 5 volt voltage on the temperature selector wheel. If no fault is found, the component should be replaced. |
| 4 | Heater Sensor - Right | Check the connection of the white component plug PIN 25 to the right heater sensor. Measure the unplugged temperature sensor, which should show at least a voltage of 5 volt. If necessary, replace the heater sensor. |
| 7 | Vaporizer Sensor | Check the connection of the white component plug PIN 22 to the vaporizer sensor. On the disconnected temperature sensor, the voltage should be at least approx. 5 volt. If the connection is operative, the component should be replaced. |
| 10 | Outside Sensor | Check the connection of the white component plug PIN 23 to the outside sensor. On the disconnected temperature sensor, the voltage should be at least approx. 5 volt. If the connection is operative, the component should be replaced. |
| 13 | Inside Sensor | Check the connection of the black component plug PIN 21 to the inside sensor. On the disconnected temperature sensor, the voltage should be at least approx. 5 volt. If the connection is operative, the component should be replaced. |
| 16 | Inside Sensor Blower | Check the connection of the blue component plug PIN 18 to the inside sensor. If the connection is operative, the component should be replaced. |
| 25 | Temperature Selector Wheel - Left | Check the connection of the black component plug PIN 22 to the left temperature selector wheel. Also check that there is a voltage of at least 5 Volt. If the connection is operative, the component should be replaced. |
| 28 | Heater Sensor - Left | Check the connection of the white component plug PIN 24 to the heater sensor. Measure the unplugged temperature sensor, which should have at least a voltage of approx. 5 volt. If the connection is operative, the component should be replaced. |
| 31 | Air Quantity Selector Wheel | Check the connection of the black component plug PIN 23 to the air quantity selector wheel. There should be a voltage of approx. 5 volt on the selector wheel. If the connection is operative, the component should be replaced. |
| 34 | Layering Selector Wheel | Check the connection of the white component plug PIN 21 to the layering selector wheel. There should be a voltage of approx. 5 volt on the layering selector wheel. If the connection is operative, the component should be replaced. |
| 40 | Water Valve - Left | Check the connection of the black component plug PIN 5 to the water valve. If the connection is operative, the component should be replaced. |
| 44 | Climate Relay / Additional Blower Relay | Check the connection of the blue component plug PIN 22 to the Climate relay. If the connection is operative, the additional blower relay should be replaced. |
| 46 | Water Valve - Right | Check the connection of the black component plug PIN 12 to the water valve. If the connection is operative, the water valve should be replaced. |
| 47 | Decoupling Relay Air Conditioning | Check the connection of the black component plug PIN 18 to the Motronic relay. If the connection is operative, the relay should be replaced. NOTE: Check the additional blower relay first. |
| 48 | Rear Window Heater Relay | Check the connection of the blue component plug PIN 20 to the rear window heater relay. If the connection is operative, the relay should be replaced. |
| 52 | Fresh Air Flap Motor | Check the connection of the blue component plug PIN 10, 11, 12 and 13 to the fresh air flap motor. Also check that there is a voltage of 12 volt on the motor. If the voltage and the connection are operative, the fresh air flap motor should be replaced. |
| 55 | Air Flow Flap Motor | Check the connection of the blue component plug PIN 6, 7, 8 and 9 to the air flow flap motor. Also check for a voltage of approx. 12 volt at the motor. If the voltage and the connections are operative, the air flow flap motor should be replaced. |
| 61 | Layering Flap Motor - Right | Check the connection of the blue component plug PIN 23, 24, 25 and 26 to the right layering flap motor. Also check that there is a voltage of approx 12 volt at the motor. If the voltage and the connections are operative, the layering flap motor should be replaced. |
| 92 | Connection Fault on Connector 50 | Check the connection of the black component plug PIN 1 for short circuit or disconnection! |
| 94 | Standing Heater / Standing Ventilation | Check the connection of the white component plug PIN 17 and 20 for short circuit or disconnection! |
