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Engine Control Unit MS 25 Sport
Bosch Motorsport
– Term 30 is an unswitched battery positive rail (same as battery positive terminal).
– Term 31 is an unswitched ground rail (same as battery negative terminal).
– MS 25 Sport needs constant Term 30 and ECU should be powered on and off only
with Engine On-switch (Term 15). Constant voltage on Term 30 is required to preserve
critical information during ECU shutdown.
CAUTION
Wrong polarity / high currents
Wrong polarity of the terminals and high currents damage the MS 25 Sport. Be careful to
observe current limits of wires and connector pins!
T30 (UBat)
T31 (GND)
+
-
Battery
Fuse
(30A)
V01 V25 V26 V49 V73
V03 V05 V28 V52 V75
Engine On
Switch
V69
V93
Auxiliary
Relay
PCV
FMU
E83
E58
E81
E82
LSU
Heat
E72
E96
+
+
+
MS 25 Sport
V50
1.7 Trigger Wheel
The software assumes a toothed trigger wheel for proper operation. The number of the
teeth is hard coded by Bosch Motorsport and can’t be changed by the customer. Custom
gap teeth numbers are optional.
We recommend 60 (-2) teeth as shown in the following picture. The crank wheel trigger
sensor must be an inductive type for the default configuration, Hall-effect crank sensor is
optional and requires software change.
The camshaft trigger sensor is a Hall-effect type with a single tooth trigger wheel, but
other configurations can be configured with calibration. Inductive cam sensor is optional
and requires software change. The picture below shows the correct installation position.
