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 saved 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
- Ignition system primary voltage output (F-suffix)
- 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
- Exhaust valve activation (V4 models)
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 four LED indicators located next to the electrical connectors that provide useful information about the status of the system.
IMPORTANT: LED 1 is toward the rear 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. 79.
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. 79.
