Service Manual 5008736_55 MFE System Analysis [Emm Led Indicators]

The EMM LED indicators provide a quick reference to the status of several outboard systems. Checking the LEDs FI RST when diagnosing an engine problem can save a lot of time.

For detailed code information, refer to the EMM Service Code Chart at the back of this manual.

IMPORTANT: LED 1 is to ward the top of the outboard (Closest to EMM J1-B connector).

1. LED indicators (Cooling hose removed for clarity)

IMPORTANT: Diagnostic communications on non-running rope start models requires that power is supplied to the EMM. Refer to Communication
on p. 86.

When the EMM is ON (engine not running), the following LEDs should light:

LED 3 – Sensor Circuits working.

LED 4 – Stop Circuit not g rounded–okay to start. FLASHING LIGHT indicates severe overheat or no oil.

Starting mode occurs from the time t he flywheel begins to turn until the outboard is running for 2 seconds. During starting, all four LEDs should
light and then go off in sequence.

LED 1 – CHARGING OKAY – Stator signal 30 V or higher.

LED 2 – CRANK POSITION OKAY – input from CPS, EMM powered ON. For NO LIGHT, check for:

• Code 16 – CPS, intermittent loss of sync

LED 3 – SENSORS OKAY (5 V). For NO LIGHT, check for:

• Code 12 – TPS circuit fault

• Code 13 – TPS below expected range

• Code 14 – TPS above expected range

• Code 19 – In Gear

• Code 23 – EMM temp. sensor circuit fault

• Code 24 – EMM temp. below expected range

• Code 41 – temp. sensor circuit fault

• Code 42 – temp. below expected range

• Code 47 – AT sensor circuit fault

• Code 48 – AT sensor below expected range

• Code 49 – AT sensor above expected range

• Code 58 – Operating temperature not reached

• Code 78 – Sensor supply voltage fault

LED 4 – LANYARD/STOP OKAY. For NO LIGHT, check for:

• Grounded stop circuit.

For FLASHING LIGHT, check for:

• Code 29 – EMM temp. OVER range (flashing)

• Code 31 – Engine temp. OVER range (flashing)

• Code 33 – Excessive no oil condition (flashing)

When the outboard is running, all of the LEDs should be off. If a light is on, check for:

LED 1 – CHARGING FAULT:

• Code 17 – system voltage (55 V) below range

• Code 18 – system voltage (55 V) above range

• Code 26 – low battery (12 V) voltage

• Code 27 – high battery (12 V) voltage

LED 2 – INJECTOR/IGNITION FAULT:

• Code 51 – cylinder no. 1 injector circuit open

• Code 52 – cylinder no. 2 injector circuit open

• Code 61 – cylinder no. 1 injector circuit short

• Code 62 – cylinder no. 2 injector circuit short

• Code 81 – no. 1 ignition primary circuit open

• Code 82 – no. 2 ignition primary circuit open

• Code 90 – Water injection solenoid short

• Code 91 – fuel pump circuit open

• Code 93 – Water injection solenoid open

• Code 94 – fuel pump circuit short

• Code 101 – No. 1 ignition timing circuit shorted

• Code 102 – No. 2 ignition timing circuit shorted

LED 3 – Sensor circuits (5 V), “SENSOR FAULT.” For LIGHT ON, check for possible fault codes:

• Code 12 – TPS circuit fault

• Code 13 – TPS below expected range

• Code 14 – TPS above expected range

• Code 16 – CPS, intermittent loss of sync

• Code 23 – EMM temp. sensor circuit fault

• Code 24 – EMM temp. below expected range

• Code 41 – PORT temp. sensor circuit fault

• Code 42 – PORT temp. below expected range

• Code 47 – AT sensor circuit fault

• Code 48 – AT sensor below expected range

• Code 49 – AT sensor above expected range

• Code 58 – operating temp. not reached

• Code 78 – Sensor supply voltage fault

LED 4 – Engine overheat, EMM temperature or sensor, oil injection pump or sensor, “NO OIL / OVERHEAT.” For LIGHT ON, check for possible
fault codes:

• Code 25 – EMM temp. above expected range

• Code 29 – EMM temp. OVER range (flashing)

• Code 31 – engine temp. OVER range (flashing)

• Code 33 – excessive NO OIL faults (flashing)

• Code 34 – oil injection pump circuit open

• Code 43 – engine overheat

• Code 117 – Critical NO OIL detected