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ENGINE MANAGEMENT MODULE (EMM)
DESCRIPTION
DESCRIPTION
The Engine Management Module (EMM) is a
water-cooled engine controller. It controls numer-
ous outboard systems including alternator output
for the 12 V and 55 V circuits. The stator provides
the EMM with voltage inputs that are essential to
alternator output.
This section discusses the functions of the EMM
and the various internal and external sensors. The
process for retrieving service codes stored in the
EMM during engine operation is also presented.
The EMM Service Code Chart located at the back
of this manual can be used to reference service
code information.
EMM Functions
The EMM controls the following processes and
functions:
• Fuel and ignition timing and duration
• Ignition system primary voltage output
• Fuel injector activation
• Oil injector pump activation
• Electric fuel pump control
• Alternator output; 55 V and 12 V
• Idle speed control
• RPM limiter
• Electrical circuit monitoring
• Service codes and warning system activation
• ROM verification, self-test
• Choke-less cold starting
• Output of “real-time” diagnostic data
• Tachometer signal
• RPM profile and engine hours
• Oiling ratios
• Exhaust valve activation (V4 models)
EMM Connections
IMPORTANT: EMM connections and wiring
must be clean and tight. Improper electrical con-
nections can damage the EMM. DO NOT attempt
to run the outboard with loose or disconnected
wiring.
Make sure EMM connections are clean and tight.
• Engine wire harness to EMM connectors; J1-A,
J1-B, J2
• Stator to EMM connections; one 6-pin AMP and
J2 connector.
1. J2 connector
2. J1-A connector
3. J1-B connector
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