Description; Emm Functions; Emm Connections; Led Indicators - BRP Evinrude E-TEC Series Service Manual

ENGINE MANAGEMENT MODULE (EMM)

DESCRIPTION

DESCRIPTION
The Engine Management Module (EMM) is a
water-cooled engine controller. It controls many
outboard systems including alternator output for
the 55 V circuits. Operating voltage is supplied to
the EMM by the stator.
This section discusses the functions of the EMM
and its various internal and external sensors. It
also describes using Evinrude Diagnostics soft-
ware to retrieve and adjust service information
stored in the EMM

EMM Functions

The EMM controls the following processes and
functions:
•
Alternator output; 55 V
•
Fuel and ignition timing and duration
•
Fuel injector activation
•
Oil injector pump activation
•
Electric fuel pump control
•
Idle speed control
•
RPM limiter
•
Electrical circuit monitoring
•
Service code creation and storage
•
Warning system activation
•
ROM verification, self-test
•
Choke-less cold starting
•
Output of diagnostic data
•
Tachometer signal
•
RPM profile and engine hours
•
Oiling ratios

EMM Connections

IMPORTANT:
EMM connections and wiring
must be clean and tight. Improper electrical con-
nections can damage the EMM. DO NOT run the
outboard with loose or disconnected wiring.
Make sure EMM connections are clean and tight.
•
Engine wire harness to EMM connector; J1-A
•
Stator to EMM connection; one 4-pin AMP con-
nector.
50
1
1. J1-A connector

LED Indicators

The EMM has four LED indicators located on top
of the circuit board that provide useful information
about the status of the system.
IMPORTANT:
LED 1 is toward the center of the
outboard (closest to EMM J1-A connector).
1
2
1. LED indicators
2. LED 1
When the ignition key is turned ON, LEDs 3 and 4
should light, indicating that sensor circuits and the
stop circuit are working.
As the outboard is being started, all four LEDs
should light and then go off in sequence. If any of
the LEDs does NOT light during starting, refer to
EMM LED INDICATORS on p. 71.
When the outboard is running, all LEDs should be
off. If any LED is lighted while the outboard is run-
ning, refer to EMM LED INDICATORS on p. 71.
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