Page 489 of 510
13B-489
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$170.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP9
CONTINUED 2
Has a parameter from group 1 reached 19,660 miles
(32,766 km)?
For each successful regeneration (R) look in group 1 for the next parameter in
order of distance whose status is STATUS4. is there at least one status?Output 3
note down the 2 identified
parameters and calculate
the interval between the 2
using the formula in the
table.(To be calculated for each successful regeneration)
Successful regeneration parameter =
_________
Next parameter at STATUS 4 = __________
Interval = Next parameter at STATUS 4 - Successful regeneration
parameter
=
_________ – _________
= _________
Is the calculated interval less
than 270 miles (450 km)?Output 4
Vdiag 20, 5C,
24 and 58
C
Vdiag 54, 18,
1C
D
AYES
NO
NO
YES
NO
YES
E
EDC16CP33
Program No.: C4
Vdiag No.: 18, 1C, 20, 24,
26, 28, 54, 58, 5C, 60, 62
Page 490 of 510

13B-490
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$170.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
IMA*: Individual injector correction
ALP9
CONTINUED 3
– Check the consistency between the IMA* codes entered and the codes engraved on the injector bodies.
– Check that the particle filter differential pressure sensor is correctly positioned and connected (see MR 395, 402,
405, 364 or 370 Mechanical, 19B Exhaust, Particle filter pressure sensor: Removal - Refitting),
– Check the exhaust pipe (see TEST1 Exhaust pipe check),
– Check the air inlet circuit (see TEST4 Turbocharged air inlet circuit check),
– Check the air flowmeter (see TEST5 Air flowmeter),
– Check the turbocharger (see TEST7 Variable geometry turbocharger check),
– Check the injectors (see TEST10 Poor injector operation),
– Check the cylinder compressions.
If the fault has not been located and the customer complaint is still present, contact the Techline.
YES
E
EDC16CP33
Program No.: C4
Vdiag No.: 18, 1C, 20, 24,
26, 28, 54, 58, 5C, 60, 62
Page 491 of 510

13B-491
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$170.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
Analysis of output for ALP9.
ALP9
CONTINUED 4
ALP
output no.Output conditions for
ALP9Cause - type of drivingRegeneration
frequencyWhat to tell the
customer?
Output 1The last 10 regeneration
attempts have failed due to
the engine cutting out.Regeneration failures
caused by engine cut-off.No regeneration
frequency analysis.Explain to the customer
the need to wait until the
end of regeneration
(warning light goes out)
before switching off the
engine.
Output 2The last 10 regeneration
attempts have failed but
not because of the engine
cutting out.Unsuitable driving
conditions.No regeneration
frequency analysis.Explain again to the
customer the driving
criteria for when the
warning light comes on.
Output 3After successful
regenerations stored in the
memory, the warning light
did not come on. No
interval can be calculated.Since the last successful
stored regenerations, the
driving conditions have not
allowed the warning light to
come on.Should be normal Vehicle correct
Output 4The interval between a
successful regeneration
and the particle filter
warning light coming on is
correct (above the lowest
possible values). The
system does not have any
irregular components.Unfavourable driving
(urban zone, underspeed,
etc.)Normal Vehicle correct
EDC16CP33
Program No.: C4
Vdiag No.: 18, 1C, 20, 24,
26, 28, 54, 58, 5C, 60, 62
Page 492 of 510
13B-492V12 MR-372-J84-13B300$180.mif
13B
*Technical Note 3419: Fault finding on the turbocharger for petrol and diesel engines. EXHAUST SYSTEM CHECK TEST1
RESOLVING MISFIRESTEST2
LOW PRESSURE CIRCUIT CHECK TEST3
TURBOCHARGED AIR INLET CIRCUIT CHECK TEST4
AIR FLOW SENSORTEST5
FUEL RETURN RAIL VALVE CHECK TEST6
VARIABLE GEOMETRY TURBOCHARGER CONTROLTEST 7: Apply
TEST 4 of
Technical Note
3419*
ROTATING PART OF TURBOCHARGERTEST 8: Apply
TEST 7 of
Technical Note
3419*
POOR INJECTOR OPERATION TEST10
TEMPERATURE UPSTREAM OF TURBINE TOO LOW TEST11
DIESEL FUEL CONFORMITY CHECK TEST12
DIESEL INJECTION
Fault finding – Test
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Page 493 of 510

13B-493V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST1 Exhaust system check
Engine stopped: Check that the silencer outlet is
not blocked. Repair or replace the silencer, if
necessary.
Check the seal of the exhaust manifold on the
contact surface between the turbocharger and the
exhaust manifold.
Is the seal in order?Repair or replace the faulty part.
Loosen the catalytic converter on the turbocharger
side.
Place a wooden block between the two parts.
Start the vehicle and check if the engine runs
better.
Is the engine running normally?The exhaust system is not the cause of the fault;
repeat the engine fault finding (see Customer
complaints - Fault finding chart).
Retighten the catalytic converter.
Loosen or separate the particle filter on the
catalytic converter side. Place a wooden block
between the two parts if necessary.
Start the vehicle and check if the engine runs
better.
Is the engine running normally?Replace the catalytic converter.
NO
YES
NO
YES
NO
YES
A
EDC16CP33_V18_TEST1 / EDC16CP33_V1C_TEST1 / EDC16CP33_V54_TEST1 / EDC16CP33_V20_TEST1 / EDC16CP33_V58_TEST1 /
EDC16CP33_V5C_TEST1 / EDC16CP33_V24_TEST1 / EDC16CP33_V04_TEST1 / EDC16CP33_V08_TEST1 / EDC16CP33_V44_TEST1 /
EDC16CP33_V4C_TEST1 / EDC16CP33_V34_TEST1 / EDC16CP33_V38_TEST1 / EDC16CP33_V74_TEST1 / EDC16CP33_V28_TEST1 /
EDC16CP33_V62_TEST1 / EDC16CP33_V26_TEST1 / EDC16CP33_V60_TEST1
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Page 494 of 510
13B-494V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST1
CONTINUED
Retighten the particle filter.
Loosen or uncouple the silencer on the side of the
particle filter (see MR 395, 402, 405, 364, 370,
Mechanical, 19B Exhaust, Parts and
consumables for repair).
Start the vehicle and check if the engine runs
better.
Is the engine running normally?Replace the particle filter (see MR 395, 402, 405,
364, 370, Mechanical, 19B, Exhaust, Particle
filter, Removal - Refitting).
Reinitialise the parameters after the particle filter
is replaced.
Run command SC036 Reinitialise
programming and select After particle filter
replacement.
Replace the silencer.
A
YES
NO
YES
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Page 495 of 510

13B-495V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST2 Resolving misfires
Check for faults DF059 Misfire on cylinder 1, DF060
Misfire on cylinder 2, DF061 Misfire on cylinder 3,
DF062 Misfire on cylinder 4, DF065 Misfire using the
diagnostic tool.
Run a compression test using the M9R flexible end piece,
part number Mot. 1772 and apply command VP036 Fuel
supply inhibition (see Interpretation of commands).
Are the values obtained correct?Check the mechanical conformity of the
valves, heater plugs and segments.
Clear the faults, start the engine and leave the engine
running at idle speed for 1 minute.
Check for faults DF059, DF060, DF061, DF062, DF065
using the diagnostic tool.
Are there any faults remaining?End of test.
Change the faulty injector to another position.
Did the fault follow the injector to its new location?Put the injectors back in their initial
positions.
NO
YES
NO
YES
NO
YES
A
EDC16CP33_V18_TEST2 / EDC16CP33_V1C_TEST2 / EDC16CP33_V54_TEST2 / EDC16CP33_V20_TEST2 / EDC16CP33_V58_TEST2 /
EDC16CP33_V5C_TEST2 / EDC16CP33_V24_TEST2 / EDC16CP33_V04_TEST2 / EDC16CP33_V08_TEST2 / EDC16CP33_V44_TEST2 /
EDC16CP33_V4C_TEST2 / EDC16CP33_V34_TEST2 / EDC16CP33_V38_TEST2 / EDC16CP33_V74_TEST2 / EDC16CP33_V28_TEST2 /
EDC16CP33_V62_TEST2 / EDC16CP33_V26_TEST2 / EDC16CP33_V60_TEST2
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Page 496 of 510
13B-496V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST2
CONTINUED
Replace the faulty injector by observing the
procedure described in the section
Replacement of components.Clear the faults, start the engine and leave the engine
running at idle speed for 1 minute.
Check for faults DF059, DF060, DF061, DF062, DF065
using the diagnostic tool.
Are there any faults remaining?
End of test.Check the mechanical conformity
of the valves, heater plugs and
segments.
A
YES
NO
YESNO
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74