CANbus Gateways

Marine Mods CAN-2-CAN Gateway with Holley® Standard to NMEA2000 Protocol comes in two primary configuration options below. This covers all ECU models, however gauges displayed by the Sniper units is limited at this time.

• Airboat / Off-Road Racing
• Inboard Marine with Auxiliary Inputs

Each gateway comes with a short M12 to HEFI harness pigtail for ECU side connection. If mounting gateway further away from the ECU, a twisted pair extension cable is required.

* Quantity Discount (2 or more)
In multi-engine applications, one gateway is required per engine to set Instance on the NMEA network. Instance # is set by an internal dip switch. If more than two engines installed, please Contact Us before purchase for a custom instance firmware.

* Installation and Updated Instructions In Downloads Tab Above.

Full N2k gauge coverage list in table below. Custom protocol changes available upon request.

HEFI to NMEA2000	Air Boat		Inboard
PGN 127488				Notes
Engine Parameter Rapid
Engine Speed	Included		Included
Boost Pressure	Included		Included
Tilt-Trim Position	N/A		Included	AUX INPUT # 1
PGN 127489				Notes
Engine Parameters
Oil Pressure	Included		Included
Oil Temperature	N/A		Included	AUX INPUT # 2
Temperature	Included		Included
Alternator Volts	Included		Included	ECU Voltage
Fuel Rate	Included		Included
Total Hours	N/A		N/A
Coolant Pressure	N/A		Included	AUX INPUT # 3
Fuel Pressure	Included		Included
Percent Load	Included		Included	ECU Throttle Position
Percent Torque	N/A		N/A
Status Indicators
Check Engine	N/A		N/A
Over Temp	Included		Included	ECU Defined
Low Oil Pressure	Included		Included	ECU Defined
Low Oil Level	N/A		N/A
Low Fuel Pressure	Included		Included	ECU Defined
Low System Voltage	Included		Included	ECU Defined
Coolant Level	N/A		N/A
Water Flow	N/A		N/A
Water In Fuel	N/A		N/A
Charge Indicator	Included		Included	ECU Defined
Preheat Indicator	N/A		N/A
High Boost Pressure	Included		Included	ECU Defined
Rev Limit Exceeded	Included		Included	ECU Defined
EGR System	N/A		N/A
Throttle Position Sensor	N/A		N/A
Emergency Stop Mode	N/A		N/A
Warning Level 1	Included		Included	IAT Alarm
Warning Level 2	N/A		N/A
Power Reduction	N/A		N/A
Maintenance Needed	N/A		N/A
Comm Error	N/A		N/A
Sub or Secondary Throttle	N/A		N/A
Engine Shutting Down	N/A		N/A
PGN 127493				Notes
Transmission Parameters
Gear	N/A		N/A	ECU Dependent
Oil Pressure	N/A		N/A	ECU Dependent
Oil Temperature	N/A		N/A	ECU Dependent
Discrete Status
Check Transmission	N/A		N/A
Over Temperature	N/A		N/A
Low Oil Pressure	N/A		N/A
Low Oil Level	N/A		N/A
PGN 127505				Notes
Fluid Level
Fluid Type	N/A		N/A
Fluid Level	N/A		N/A
Tank Capacity	N/A		N/A
PGN 127508				Notes
Battery Status
Battery Voltage	Included		Included	ECU Voltage
Battery Current	N/A		N/A
Battery Case Temperature	N/A		N/A
PGN 130310				Notes
Environmental Parameters
Water Temp	N/A		N/A
Outside Ambient Air Temp.	Included		Included	IAT Value
Atmospheric Pressure	Included		Included
PGN 128259				Notes
Speed
Speed Water Referenced	N/A		N/A
Speed Ground Referenced	N/A		N/A
Speed Water Referenced Type	N/A		N/A
PGN 130576				Notes
Small Craft Status
Port Trim Tab	N/A		Optional	AUX INPUT # 4
Starboard Trim Tab	N/A		Optional	AUX INPUT # 5

Marine Mods CAN-2-CAN J1939 Gateway converts industrial and heavy equipment CANbus protocol J1939, into NMEA2000 protocol for use with compatible gauges and multi-function displays. The J1939 gateway translates all major engine and transmission related parameters.

Marine Mods GMLAN - N2k Gateway covers all High Speed GM CANbus protocols used on model years 2004 to 2019. Allowing OEM hardware builders the option to run NMEA2000 based MFD's or gauge sets, with just two wires on stand alone engine applications.

Rather than using a traditional OBD2 "request and reply" PID structure to gather gauge data, our code reads raw steaming data from the OEM ECM and TCM just like other GM CANbus hardware. For certain gauge parameters not inherit to a factory dash like IAT or Boost, we use Dynamic PID's to instruct the ECM to include this extra data inside the normal broadcast stream. This equals a much cleaner approach, with no delay or lag on the gauges displayed.

HS GMLAN or GM GLOBAL-A Protocol is fairly common across all GM models. However there are some slight differences in gauge related data packets between ECM hardware and OS versions. For this reason we have tried to split up the firmware configuration options based on ECM models. Please Contact Us with any compatibility questions.

Current ECM Coverage

• E38
• E67
• E92
• E94
• E35A
• E35B