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Fuel Pump Fuel Supply (vehicles built from September 2005)

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Item
Part Number
Description
1
-
Fuel pump fuel supply line connection
2
-
Electric fuel heater connection
3
-
Fuel filter drain screw
4
-
Fuel filter drain outlet
5
-
Water-in-fuel sensor (if equipped)
6
-
Fuel tank fuel supply line connection
The fuel system on this vehicle is designed to prevent the fuel tank being run dry. When the fuel level in the fuel tank reaches a preset limit, after the low fuel warning indicator is illuminated, the engine will be made to run rough to indicate to the driver that the fuel level is low. If this warning symptom is ignored, the engine management system will terminate the fuel injection process to prevent damage to the fuel delivery components.
The fuel filter in the common rail fuel system is designed to extract far smaller particles from the fuel supply than conventional fuel filters.
Built into the fuel filter is a fuel heater element. The fuel heater is switched on and off by means of a temperature conscious switch contained within the fuel filter. The fuel heater will only switch on at a fuel temperature of between 0 and -4 °C. The fuel heater will switch off between 1 and 5 °C.
For markets that are considered to have poor quality diesel fuel, a water in fuel sensor is fitted to the fuel filter.
The fuel filter, fuel filter element and the fuel heater are one component and cannot be serviced individually.
Any restrictions in the fuel supply system to the fuel pump, will result in an increase in vacuum in the fuel supply lines. This resultant increase in vacuum will act as a fuel pump high-pressure chamber supply restriction, similar to the function of the fuel metering valve. This will result in the initial symptom of reduced power output. As a consequence of the increase in the fuel supply line vacuum, air will be forced to enter the fuel system through the fuel line unions. This will result in poor idling, misfire and poor starting.
Takže co který konektor znamená už víme, ale jak otestovat ten předehřev pořád nevím 