Section 07 ENGINE MANAGEMENT (DI)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
ELECTRONIC MANAGEMENT
MPEM REPLACEMENT
General
NOTE: Prior to replacing a suspected MPEM, en-
sure that all the recommendations in the general
introduction of this section have been followed.
NOTE: When MPEM is replaced, the TPS closed
position and the ignition timing setting must be re-
set. Refer to their specific section for adjustment.
To allow transferring the previous recorded in-
formation from the old MPEM to the new one,
use the vehicle communication kit (VCK) with the
B.U.D.S. software. Use MPEM Replace in the
Module menu. Follows instructions in its help
system.
NOTE: If the old MPEM is working, it must be
read inside B.U.D.S. prior to removing it from the
vehicle to carry vehicle information and history to
the new MPEM. Besides, select the Setting tab
andnotetheOffset Angle in the Ignition box.
When installing the new MPEM, re-use this angle
as a preliminary setting. Then, proceed with the
regular procedure for the ignition timing setting.
If the old MPEM is not working, try to find a previ-
ous saved file from B.U.D.S. Otherwise, perform
the operations described in IF THE PREVIOUS
MPEM WAS NOT READ WITH B.U.D.S. below.
Replacement
Disconnect battery cables.
WARNING
Battery BLACK negative cable must always be
disconnected first and connected last.
Disconnect AMP connectors from MPEM.
Remove MPEM.
Install the new MPEM on the vehicle.
Reconnect AMP connectors to MPEM then bat-
tery cables.
If the previous MPEM was read with B.U.D.S.
Transfer the data from the previous MPEM to the
new one using B.U.D.S. then proceed with the
required resets after following the procedure in
VALIDATING TPS SYNCHRONIZATION below.
If the previous MPEM was NOT read
with B.U.D.S.
– Enter the vehicle and engine serial numbers in
the Vehicle tab.
– Enter the old MPEM serial number in the Part
Replacement under History tab. Click on Add
part in History.
– Reprogram safety lanyard(s).
NOTE: The MPEM serial number can be found on
the MPEM sticker that also shows the P/N.
Continue procedure as per VALIDATING TPS SYN-
CHRONIZATION below.
Validating TPS Synchronization
Select the Activation tab.
Point the mouse cursor over the PTO TPS. Check
the ADC reading. It must be between 23 and 45.
Activation
30
1
3
F12R1JA
2
1. “Activation” tab
2. Point on PTO TPS
3. ADC reading
PointthemousecursorovertheMAG TPS. Check
the ADC reading. It must be between 37 and 59.
If either readings are not within those parameters,
they are out of range and the MPEM will be unable
to initialize. Proceed with THROTTLE BODY SYN-
CHRONIZATION as detailed in THROTTLE BODY.
If the ADC's are within range, proceed with the
required resets.
smr2004-Complete Line Up 357
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