Iveco Daily. Manual - part 127
F1
A
E
NG
INE
D
AI
LY
486
B
as
e
-
M
ay
2004
P
rin
t
603.
93.
281
SYMPTOM
SYSTEM REACTION
POSSIBLE CAUSE
TESTS OR RECOMMENDED
ACTION
NOTES
The engine cuts out or
fails to start.
The EDC control unit is
powered, the starter motor
turns but the engine fails to
start.
The rail pressure does NOT
reach 200 bar.
Rail
pressure
relief
valve
jammed open or lost its
setting (continually discharges
towards the tank).
If fuel has come out of the valve
exhaust pipe while driving with the
starter motor, change the valve.
The engine cuts out or
fails to start.
The EDC control unit is
powered, the starter motor
turns but the engine fails to
start.
The rail pressure does NOT
reach 200 bar.
Mechanical defect in the gear
pump, pressure regulator and
the pumping elements of the
high-pressure pump.
After checking there is fuel in the tank
and excluding every other possibility
(see 1
st
Troubleshooting Section),
replace
the
high-pressure
pump
together with the pressure regulator.
The engine cuts out or
fails to start.
The starter motor turns but
the engine fails to start.
The
rail
pressure
during
starting regularly rises above
200 bar.
EGR pneumatic valve jammed
open and air throttle valve
jammed shut.
Check and replace the defective
components.
The engine starts with
difficulty.
The EDC control unit is
powered, the starter motor
turns but the engine starts only
after insisting a long time.
Very slow increase in rail
pressure.
The fuel motor pump is not
powered (no buzzing is heard
with the key ON for 9 sec.).
Check that no electric cable has
disconnected from the motor pump.
Check the wiring between the control
relay and the motor pump to identify
any break in the circuit.
After starting, with a load request the engine
goes into recovery (if due to insufficient fuel
reaching the high-pressure pump error 8.1 is
detected, see 1
st
Section).
The engine starts with
difficulty.
The
rail
pressure
during
starting regularly rises above
200 bar.
Injector mechanically jammed
shut.
Perform the Engine Test (cylinder
efficiency) to identify the defective
injector and replace it.
Depending on the extent of the jamming, the
control unit might detect a lack of balance
between the cylinders (See error 3.1 — 3.2 —
3.3 — 3.4, 1
st
Section).
The engine starts with
difficulty.
The
rail
pressure
during
starting regularly rises above
200 bar.
EGR pneumatic valve jammed
open or air throttle valve
mechanically jammed shut.
Check which component is defective
and replace it.