Section 7 - Troubleshooting
Page 138
90-866938081 MAY 2009
Diagnosing Electronically Controlled Fuel System Problems
Your Cummins MerCruiser Diesel Authorized Repair Facility has the proper service tools
for diagnosing problems on electronically controlled fuel systems. The Engine Control
Module (ECM) on these engines has the ability to detect some problems with the system
when they occur, and store a trouble code in the ECM's memory. This code can then be
read later by a service technician using a special diagnostic tool.
Electrical Connections
NOTE: Refer to
Section 6
Electrical System Architecture diagrams and for additional
electrical information.
IMPORTANT: To avoid damage to the electrical system, refer to the following precautions
when working on or around the electrical harness or when adding other electrical
accessories.
• Do not tap accessories into the engine harness.
• Do not puncture wires for testing (probing).
• Do not reverse the battery leads.
• Do not splice wires into the harness.
• Do not route harness near sharp edges, hot surfaces, or moving parts.
• Fasten cables away from and sharp edges, fasteners, or objects that could wear into
the harness or pinch the harness.
• Avoid sharp bends in a data harness. Minimum bend radius should be 7.6 cm (3 in.)
for installation.
• Fasten harnesses to the boat at least every 45.7cm (18 in.), using appropriate
fasteners.
• Do not attempt diagnostics without the proper, approved service tools.
• Disconnect both the negative (–) and positive (+) battery cables from the battery before
electric arc welding on the vessel. Attach the welder ground cable no more than 0.61
meters [2 feet] from the part being welded. Do not connect the ground cable of the
welder to any ECM cooling plate or ECM. Welding on the engine, drive, or engine or
drive mounted components is not recommended or damage to the engine or drive or
related components can result.
Troubleshooting Charts
Troubleshooting Engine Related Problems
Troubleshooting engine related problems may require information not found in these
troubleshooting charts. Additional troubleshooting information can be found in the owners
manual for the engine. Refer to the appropriate
Marine Recreational High Output
Propulsion Units QSB or QSC Operation and Maintenance Manual
provided with the
engine.
Check VesselView First
Your VesselView display is the primary information source for the various functions of your
boat. Consult the VesselView display if you suspect something is wrong. VesselView
displays faults and other information that can be helpful in determining the current status
of various systems that could be causing your concern and the solution to the problem.
Summary of Contents for Zeus 3000 Series
Page 4: ......
Page 20: ...Section 1 Limited Warranty Notes Page 12 90 866938081 MAY 2009...
Page 30: ...Section 2 Getting to Know Your Power Package Notes Page 22 90 866938081 MAY 2009...
Page 82: ...Section 3 On the Water Notes Page 74 90 866938081 MAY 2009...
Page 86: ...Section 4 Specifications Notes Page 78 90 866938081 MAY 2009...
Page 94: ...Section 5 Maintenance Page 86 90 866938081 MAY 2009 Date Maintenance Performed Engine Hours...
