Section12ELECTRICALSYSTEM
Subsection 01 (IGNITION SYSTEM)
Electrical Connections
DESS Post Connection
Use adapters of the VCK and connect cable to the
vehicle DESS post. Open the software B.U.D.S.
2
F12H0BA
1
1. 6-pin adapter (P/N 529 035 679)
2. DESS adapter (P/N 529 035 684)
DESS Post Connection Through the
6-Pin Connector
Disconnect the connector shown in the following
picture and install RFI DESS adapter (P/N 278 001
978).
F12H18A
1
1. Connector to be disconnected
After all connections are done, connect the safety
lanyard to the DESS post to activate the commu-
nication.
All Connections
IMPORTANT: When using the software B.U.D.S.,
ensure that the protocol matching the connec-
tion used is properly selected in “MPI” under
“Choose protocol” as per the following chart.
TYPE OF
CONNECTION
ADAPTER TO
USE
PROTOCOL
TO CHOOSE
Through DESS
post
DESS adapter
(P/N 529 035 684)
Through
6-pin DESS
connector
RFI DESS
(P/N 278 001 978)
DESS
MPEM Programmer
As an alternate method to correct the ignition tim-
ing, the data of the MPEM can be changed using
the MPEM programmer (P/N 529 035 878).
NOTE: For more information on the MPEM pro-
grammer, refer to the MPEM programmer guide
(P/N 219 700 138).
Refer to the TIMING CORRECTION CHARTS,
used per MPEM programmer, to find the number
corresponding to the timing correction needed.
The Fixed Timing function must be activated first.
This function allows to check ignition timing at any
RPM because it locks ignition timing at 12 degrees
BTDC.
NOTE: Fixed Timing function must be activated
before starting engine when using the MPEM pro-
grammer.
Fixed Timing Function
1) Connect the communication cable to the
MPEM programmer and the other end to the
safety lanyard switch on the craft.
2) Press the ON/C button on programmer and en-
ter your password.
3) Press 3 to choose Vehicle info in programmer.
4) Press 8 to choose Bosch system.
5) Press 1 to choose Diagnosis.
6) Press 4 to choose Adjustment.
7) Press 4 to choose Fixed timing.
8) The programmer display Timing = 12.00 deg.
550 smr2004-Complete Line Up
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