Land Rover Workshop Service and Repair Manuals

 
The VCV is fixed directly to the HPP. 
 
The VCV regulates the fuel supply (and hence the quantity of fuel) from the transfer pump to the HPP elements, 
depending on the fuel pressure in the rail. 
 
This makes it possible to match the delivery of the HPP to the requirements of the engine from the low-pressure side. The 
quantity of fuel flowing back to the main fuel supply line is kept to a minimum. 
 
In addition, this adjustment reduces the power consumption of the HPP, improving the efficiency of the engine. 
 
NOTE :  

 
NOTE :  

 
VCV Not Actuated (A)  

4

 -

Coil

5

 -

Armature

6

 -

VCV

The fuel volume control valve default is closed without electrical supply. An open circuit connector will prevent the 
engine from running. 

The VCV cannot be replaced as a separate component in service. 

Item  Part Number 

Description 

A

 -

VCV not actuated

B

 -

VCV actuated

1

 -

Fuel supply from the transfer pump

2

 -

Piston

3

 -

Fuel supply to the HPP

4

 -

Coil energised

5

 -

Quantity of fuel

6

 -

Control current

7

 -

VCV at constant engine speed