47 MLB DDEC System

Question 1

There are two ECMs; they are mounted directly on each engine. What are the ECM functions?

Answer 1

• Engine Governing
• Cold Start Fueling and Timing
• Engine protection and diagnostics
• Injection timing
• Rated speed and power
• Sensor calibrations
• Smoke control

Question 2

Marine Interface Modules (MIM)

Answer 2

MIMs mounted on both engines provide the interface between the boat’s control systems and the ECM

Question 3

Engine Room Interface Module (ERIM)

Answer 3

The ERIM is located in the Auxiliary Machinery Compartment. It is the central processor of the control systems (throttles) on the boat. It accepts (ERIM) signals from the three control stations on the boat and commands the engines (through the MIMs and ECMs) to operate at the proper speed. It also directs the clutch actuators to control direction of propulsion.

Question 4

Control station interface modules (CSIM)

Answer 4

There are three CSIMs on the 47FT MLB. All three are located in the Enclosed Bridge; two in the overhead for the Open Bridge throttles and one in the main console, port side under lower kick plate. The CSIM receives signals from the throttles and the throttle control buttons. It sends this information encoded into command signals to the ERIM.

Question 5

Electronic Display Modules (EDMs)

Answer 5

The EDMs are the LCD displays mounted in the Enclosed Bridge and the Open Bridge. There is one EDM for each engine at each location. They receive information via a connection to the CSIM and display engine RPMs and vital performance data such as oil pressure, engine temperature, transmission oil pressure and temperature, instantaneous fuel consumption and total engine hours.

Question 6

Electronic Gear Interface Modules (EGIM)

Answer 6

The EGIMs are located in the Auxiliary Machinery Compartment underneath the ERIM. They take electronic signals from the ERIM and actuate the reduction gear clutches.