Replacing D.p.f. Catalyst; Replacing Differential Sensor (Delta-P) - Iveco daily euro 4 Repair Manual

D E 4
AILY URO
507130

Replacing D.P.F. catalyst

Replacing D.P.F. catalyst needs that all the counters of below
indicated parameters are reset in the central unit, as:
- particulate quantity in new filter is zero, so, if particulate
quantity is not reset, filter regeneration will start even if it
is not necessary;
- quantity of accumulated ashes is zero, so, if ashes counter
is not reset, regeneration frequency will be greater than
needed, consequently increasing fuel consumption, and
particulate filter thermal fatigue; and, in extreme cases,
there will be an unnecessary request to refill engine oil;
- post-injected fuel quantity is zero, so, if post-injected fuel
counter is not reset, there may be an early request to refill
engine oil.
NOTE
Where both DPF catalyst is replaced and engine oil
is refilled, resetting post-injected fuel counter is not
necessary.
- regeneration status: regeneration unnecessary, in progress,
interrupted, resumed;
- miles covered and times from last complete regeneration;
- differential pressure (delta-p) sensor drift self-rectification;
- oxidiser catalyst drift; consequently, if catalyst ageing
function is not reset, quantities of unnecessary
post-injections might be present.
The meters used to evaluate the above-mentioned
parameters can be reset by means of the IVECO MODUS -
E.A.SY. - IT 2000 diagnosis instruments, by programming the
control unit again and performing the DPF catalyst
replacement procedure, in accordance with the instructions
given by the diagnosis instruments.
Print 603.93.651
540743 Replacing
(delta-p)
Pressure difference between gas pressure at catalyst module
inlet and gas pressure at ceramic walls filter outlet is
converted into a voltage signal (Vout) by pressure sensor.
During engine running, E.D.C. 16 central unit performs
checks on differential pressure sensor drift and calculates
engine compensation and running values, and corrects them.
Consequently, after replacing the sensor, it is necessary to
reset rectification coefficients.
The meters used to evaluate the above-mentioned
parameters can be reset by means of the IVECO MODUS -
E.A.SY. - IT 2000 diagnosis instruments, by programming the
control unit again and performing the differential sensor
replacement procedure, in accordance with the instructions
given by the diagnosis instruments.
29
F1A ENGINE
differential sensor
Base - March 2006