Service Manual 5008740_200-300 HP 90 ° V Engine Managment Module [External Sensors]

Sensor inputs and internal EMM controllers are used to control outboard operation. Use Evinrude Diagnostics software to troubleshoot the sensors. Refer to the EMM Service Code Chart at the back of this manual for a complete list of all engine fault codes.

The EMM provides a 5 V DC signal for sensor circuits. It monitors all sensor voltage inputs and compares them to predetermined accept able ranges. Inputs that fall outside of the accept able range create service codes.

The air temperature sensor monitors the air temperature at the throttle body.

If the AT sensor volt age is out of the expected range, or the sensor or circuit fails, the EMM:

Monitors cylinder head temperature.

If cylinder head temperature exceeds 212° F (100° C) below 2000 RPM, the EMM:

If cylinder head temperature exceeds 185°F (85°C) above 2000 RPM for 60 seconds, the EMM:

If cylinder he ad temperature exceeds 194°F (90°C) above 2000 RPM for 3 seconds, the EMM:

Activates S.A.F.E.

If cylinder he ad temperature exceeds 248°F (120°C) for 3 seconds, the EMM:

The outboard will not restart until the engine temperature returns to normal. Refer to SHUTDOWN MODE on p. 63.

If sensor values are less than -13 °F (-25°C), or greater than 329°F (165°C), the EMM:

If sensor values are below -4°F (-20°C), the EMM:

If cylinder head does not reach operating temperature (122°F / 50°C below 1000 RPM) in 1 0 minutes, the EMM:

The oil pressure sensor monitors oil pressure in the oil distribution manifold.

If the sensor does not detect pressure for 1 50 pump cycles (3.3 L models), or 75 pump cycle s (3.4 L models), the EMM:

If outboard has been run for more than 5 hours with NO OIL faults (codes 34 & 38), the EMM:

IMPORTANT: The out board will re start for one minute intervals until problem is re solved and code is cleared. To clear code use the diagnostic software program.

If the sensor reads out of the expected range, or the sensor or circuit fails, the EMM:

If the sensor circuit indicates below expected range (<.4 V), the EMM:

If t he sensor circuit indicates above expected range (> 4.6 V), the EMM:

The throttle position sensor receives a voltage signal from the EMM. As the throttle lever is rotated, the EMM receives a return voltage signal through a second wire. This signal increases as the TPS lever is advanced. A third wire provides a ground circuit back to the EMM.

If TPS voltage is greater than 0.65 V when the key is turned to ON, the EMM:

Creates service code 11

If the outboard is started, the code is saved.

If the key ON voltage is greater than 0.78 V when the engine is started, speed is limited to idle.

If code 11 is present as both a Active Fault and a Occurred Fault, refer to Control Cable Installation on p. 19.

If the TPS or TPS circuit fails (less than 0.14 volts or greater than 4.92 volts), the EMM:

IMPORTANT: When a TPS circuit fault has been detected, the outboard will not accelerate above idle speed. To reset, stop the outboard and correct the fault.

If the TPS circuit reads below 0.2 volts, the EMM:

If the TPS circuit reads above 4.85 volts, the EMM:

Ribs spaced on the flywheel mark crankshaft position. As the ribs pass the magnetic field of the CPS, an AC voltage signal is gene rated. The EMM uses this signal to identify crankshaft position and speed, generate a tachometer signal, and control fuel and ignition timing.

If the sensor is damaged or the signal is intermit tent:

• Below 2000 RPM 5 occurrences

• Above 2000 RPM: 1 occurrences the EMM:

Approximate air gap between CPS and flywheel encoder ribs is 0.073 (1.85 mm).

Use the Evinrude Diagnostics software Monitor screen to check CPS operation. The software should show an RPM reading while the outboard is cranking. If the CPS or its circuit fails, no RPM reading will appear and the outboard cannot run.

Knock sensors (one per cylinder head) detect the presence of knock (pre-ignition or detonation) during the combustion cycle.

When knock is detected, the EMM temporarily increases fuel flow and retards ignition timing for the affected cylinder.

If knock continues, the EMM:

If the sensor circuit is OPEN, the EMM:

A switch mounted on the powerhead signals the EMM when the shift linkage is moved from FOR WARD or REVERSE into NEUTRAL.

A cam on the powerhead shift arm closes the switch in NEUTRAL , completing a ground circuit to the EMM. This signal is used to control:

• Neutral RPM limit

• Shift Interrupt function.

The shift interrupt function shuts off fuel and spark to three cylinders for approximately one second to reduce drive train loads a nd ease shifting, then immediately restores normal engine operation. The switch must be released to its open position before the shift interrupt function can be activated again. This circuit does not function above 2500 RPM.

1. Switch, neutral/shift interrupt
2. Cam

If the switch is stuck in the close d position, the EMM: