Section 06
ENGINE MANAGEMENT (DI)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
06-03-34
SMR2002-030 _06_03A.FM
IMPORTANT:
To check the TDC setting, the spark
advance curve must be locked first. This allows to
perform TDC setting at
any RPM
by keeping the
ignition timing “frozen” so that it does not vary
with engine RPM. See TDC SETTING below for
more information.
CAUTION:
If the spark advance curve is not
locked using B.U.D.S. then a wrong ignition tim-
ing will be seen as the ignition curve does not
match the locked ignition timing.
11. Start engine and check marks
at idle speed.
Point beam of timing light straight in line with
timing mark pointer.
NOTE:
Look at the mark at the same angle as it
was scribed so that parallax error is minimized.
1. Timing light straight in line with pointer
CAUTION:
If engine is to be run more than a few
seconds, engine must be cooled using the flush
kit.
NOTE:
If mark on PTO flywheel is perfectly align-
ed with timing mark pointer, no adjustment is re-
quired. If mark does not align with pointer, recheck
PTO flywheel mark before performing the TDC
setting to ensure PTO flywheel has not loosen or
tightened.
TDC Setting
General
To correct the TDC setting, the data of the MPEM
is changed using the VCK (Vehicle Communication
Kit) (P/N 529 035 844). Look in
Setting
section of
the software B.U.D.S.
NOTE:
For more information on the VCK, refer to
its online help. The MPEM programmer will not
work to perform this operation on the
DI engines
.
CAUTION:
If the TDC setting is adjusted too ad-
vanced, this will cause serious damage to the
engine.
Adjustment
In this operation, the ignition timing light and
B.U.D.S. are used to synchronize the MPEM TDC
reference with the engine crankshaft. This timing
adjustment will affect the timing of ignition as well
as direct injector timings. The aim of the adjust-
ment is to align the mark on the flywheel with the
pointer at idle using the timing light and B.U.D.S.
When this is achieved, then the MPEM TDC refer-
ence is synchronized with the engine crankshaft.
1. “Setting” tab
2. Ignition offset section
3. “Locked” box
4. Current angle in MPEM
5. Arrows to change the angle
1. Choose the
Setting
tab and look under
Ignition
Offset
.
2. Check the
Locked
box to “freeze” the timing at
the correct value.
3. The VCK displays the number that is stored in
the MPEM.
4. Now click the up or down arrow to change the
number of the current angle so that the TDC
setting marks align when checking with the tim-
ing light. Each step makes an adjustment of 1/4
degree.
NOTE:
Each time the setting is changed on the
screen, the new value is also changed in the
MPEM, so there may be a slow response, do not
make changes too quickly.
5. When marks align, uncheck the
Locked
box to
finish.
F06H07A
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F12R0WA
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