Do gasoline engines with an electronic control module (ECM) have J1939 compatibilities?

Most Gasoline engines come equipped with a standard ECM which communicates the J1939 protocol.
One of the most common ECMs found today on many gasoline engines happens to be manufactured by Delphi and is commonly called MeFi.
This particular ECM can be found on many manufacturer's engines; the most common are as follows:

  • Volvo Penta Gxi and Osi engines.
  • Crusader
  • GM Marine engines
  • Volkswagen Marine engines.
  • Mercruiser engines

Jim MacFarlane out of Portland Marine Electronics has compiled a list of J1939 PGNs transmitted via the Mefi ECMs.

 *highlighted PGNs are compatible with the J2K100

MEFI ECM Type

   

5

5A

5B

5C

5D

PGN

Information Description

Yes

Yes

Yes

Yes

Yes

61443

Pedal Position

Yes

Yes

Yes

Yes

Yes

61444

Engine RPM

Yes

Yes

Yes

Yes

Yes

65262

Coolant Temperature (and Oil Temperature MEFID)

Yes

Yes

Yes

Yes

Yes

65263

Fuel Pressure and Oil Pressure

No

No

Yes

Yes

Yes

65266

Fuel Rate (LPH) and Throttle Position

No

No

Yes

Yes

Yes

65269

Barometer

No

No

Yes

Yes

Yes

65270

Boost Pressure, Manifold Air Pressure, and Manifold Air Temperature

Yes

Yes

Yes

Yes

Yes

65271

Voltage from Ignition Switch, Voltage from System Relay

Yes

Yes

Yes

Yes

Yes

65276

Fuel Level (No engines equipped with sensor to date)

Yes

Yes

Yes

Yes

Yes

65500

Proprietary Engine Data  Data Useful for Dash / Cluster / Helm) (Uses NEMA2000 Fast Packet Protocol)

No

No

No

Yes

Yes

65501

Proprietary Fuel Consumption Data)

You can establish whether or not the interface is working, with the key on but engine NOT running (useful for jet boats that cannot be run out of water) while in the shop – you will see voltage and temperature.

The USB100, N2KMeter, and N2KAnalyzer are very helpful with the diagnostic/bus health and installation issues.

Helpful links:
Marine Mefi info: http://www.gmpowertrain.com/Libraries/Marine_Engines/Marine_EFI.sflb.ashx

Posted - Fri, Feb 17, 2012 10:43 AM. This article has been viewed 32637 times.
Online URL: https://www.maretron.com/support/knowledgebase/phpkbv7/article.php?id=536