DESCRIPTION
The Engine Management Module (EMM) is a water-cooled engine controller. It controls many outboard systems including alternator output for the 12 V and 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 and 12 V
Start Assist Circuit (SAC) voltage boost
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
Shift interrupt function
Anti-knock compensation
EMM Connections
IMPORTANT: EMM connections and wiring must be clean and tight. Improper electrical connections 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 connectors; J1-A, J1-B, J2
Stator to EMM connections; one 6-pin AMP and J2 connector.
- J2 connector
- J1-A connector
- J1-B connector
LED Indicators
The EMM has LED indicators located next to the electrical connectors that provide information related to various electrical circuits.
IMPORTANT: LED 1 is toward the top of the outboard (Closest to EMM J2 connector).
- LED indicators
When the ignition key is turned ON, LEDs 1, 3 and 4 should light, indicating that the SAC circuit, 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. 78.
When the outboard is running, all LEDs should be off. If any LED is lighted while the outboard is running, refer to EMM LED INDICATORS on p. 78.
