Volkswagen CJDA Workshop Manual page 408

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Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
● Display zone 2, pressure in high pressure fuel system
(specified): 170... 350 bar.
● Display zone 3, pressure in high pressure fuel system (ac-
tual): 170... 350 bar.
● Display zone 4, duty cycle (specified): 15... 30 %
Engine codes CPYA, CPYB, CPYC, CPYD, CPYE
● Display zone 2, pressure in high pressure fuel system
(specified): 320... 780 bar.
● Display zone 3, pressure in high pressure fuel system (ac-
tual): 320... 780 bar.
● Display zone 4, duty cycle (specified): 25... 42 %
Continuation for all engine codes
If the specified values in display zones 2 and 3 are roughly with-
in the same range, and if the pressure difference does not ex-
ceed 40 bar:
No fault was detected.
– Check return flow rate of fuel pressure regulating valve
⇒ P age
-N276- 377.
– Then, read event memory of engine control unit, and clear
event memory if necessary
If the display zones 2 + 3 show an alternative value of 360 bar:
– Check fuel pressure sender -G247-
If the specification for display zone 3 has not been attained or if
it has been exceeded:
– Renew fuel pressure regulating valve -N276-.
If the pressure difference in display zones 2 + 3 exceeds 40 bar,
or if the duty cycle specification in display zone 4 has not been
attained:
– Switch off ignition.
Checking resistance
Pull off connector -5- for fuel pressure regulating valve -N276-.
392 Repair Group 23 - Mixture preparation - injection
⇒ P age
26, read event memory.
⇒ P age
394.