GF47.40-P-2003OHL | Component description for control unit for condensation sensor for fuel filter with heating element | 6.12.11 |
ENGINES 642.9 in MODEL 221.0 with CODE () Retrofitted heated fuel filter
up to YoM 10/2
ENGINES 642.9 in MODEL 221.1
P47.40-2109-11
Shown on model 221
N33/7 Control unit for condensation sensor for fuel filter with heating element
Location
The control unit for condensation sensor for fuel filter with heating element is located in the engine compartment at the rear left.
Task
The condensate control unit actuates the condensation sensor for fuel filter with heating element (B76/1). The condensation level is read in by the control unit for condensation sensor for fuel filter and transmitted to the CDI control unit (N3/9).
Input and output signals
The following input signals are evaluated by the control unit for condensation sensor for fuel filter with heating element and issues appropriate output signals:
Direct input signals
Direct output signals
Direct input signals
- Circuit 15
- Terminal 30
- Condensation level from the condensation sensor for fuel filter with heating element
Direct output signals
- Fuel preheating system heating element
- Condensation level to CDI control unit
Function
For an outside air temperature <2°C the control unit for the condensation sensor is switched on and actuates the heating element in the condensation sensor for fuel filter. The control unit for condensation sensor switches off after 30 minutes.
Referenced documents
- pe4721p200097saa Wiring diagram for fuel prefilter with heated water separator