Releasing Pressure In High-Pressure Area - Volkswagen Amarok 2011 Workshop Manual

4-cylinder injection engine (2.0 l direct injection engine, turbocharger) - Edition 02.2011
1.4 Releasing pressure in high-pressure
area
WARNING
The injection system consists of a high-pressure section (max‐
imum approx. 120 bar) and a low-pressure section (approx. 6
bar).
Prior to opening the high-pressure area, e.g. when removing
the fuel pressure sender -G247- , the fuel pressure in the high-
pressure area must be reduced to a residual pressure of
approx. 6 bar. The appropriate procedure is described as fol‐
lows.
– Connect vehicle diagnostic tester and then carry out Guided
Fault Finding, „Reducing high fuel pressure".
– Switch off ignition.
WARNING
The fuel lines are pressurized! Wear eye protection and pro‐
tective clothing to avoid eye injuries and skin contact. Before
opening the high-pressure section, wrap a cloth around the
connection.
– Now place a clean cloth around the connection and carefully
open the connection to release the residual pressure of ap‐
prox. 6 bar. Catch the escaping fuel.
– After completing work, read fault memory of engine control unit
and clear all fault entries.
Note
If the fault memory was cleared, the readiness code must be gen‐
erated ⇒ vehicle diagnosis tester „Guided functions".
Amarok 2011 ➤
1. General notes on fuel system
161