Service Manual 15-30 HP System Analysis [Emm Led Indicators]

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

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

LED 1 is closest to the center of the EMM (closest to EMM J1-A connector).

1. LED indicators
2. LED 1

Key ON

Diagnostic communications on non-running rope start models requires that power is supplied to the EMM. Refer to Communication on p. 58.

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

LED 3 – Sensor Circuits working. FLASHING LIGHT indicates Code 57 – engine will not start.

LED 4 – Stop Circuit not grounded–okay to start. FLASHING LIGHT indicates severe overheat or no oil – engine in SHUTDOWN mode.

Starting

Starting mode occurs from the time the 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 (tiller models)
• 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

For FLASHING LIGHT, check for Code 57.

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 – Engine shutdown, excessive no oil condition

Running

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 91 – fuel pump open circuit
• Code 94 – fuel pump circuit short
• Code 101 – cylinder no. 1 ignition circuit short
• Code 102 – cylinder no. 2 ignition circuit short

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 – 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 57 – high RPM with low TPS setting
• 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 overheat
• Code 29 – EMM overheat, critical (flashing)
• Code 31 – engine overheat, critical (flashing)
• Code 33 – excessive NO OIL faults
• Code 34 – oil injection pump circuit open
• Code 40 – engine temp over range, low speed
• Code 43 – temp. above expected range
• Code 117 – Critical NO OIL detected
• Code 120 – Low Oil Switch circuit OPEN