Holiday Neptune 2004, Owner'S Manual

Page: 381 / 416

CHASSIS INFORMATION --- SECTION 10 • 381
NEPTUNE 2004
10
The Cummins diesel engines are 6-cylinder in-line engines, utilizing an electronic
fuel control system to supply fuel to the cylinders for precise fuel delivery, as well
as built-in diagnostics to monitor engine operation.
Engine electronics also enable the use of programmable monitoring features
that may cause limited engine power/vehicle speed when certain conditions arise.
These features limit the operation of the engine when conditions that may damage
the engine are encountered. These conditions may include such events as low oil
pressure and high coolant temperature. When the engine electronics encounter
such a condition, it limits the amount of power produced by the engine to help
prevent or limit damage. It is possible however, for the engine to be damaged if
corrective action is not taken immediately if such a condition exists.
Operation of the vehicle while in the limited operation mode may result in
serious engine damage. If a sudden loss of power is noticed in conjunction with
the engine warning lights illuminating (
STOP ENGINE , CHECK ENGINE and
WARNING ), pull to the side of the road as soon as it is safely possible. Evaluate
the situation.
INFORMATION: Refer to the engine manufactures OEM for
additional information concerning the operation, description,
maintenance, and warranty information for the engine.
The engine ECM will record three types of fault codes; Electronic Control
System Faults, Protection System Faults and Maintenance Indicators. All faults
recorded will be ACTIVE or INACTIVE. Not all faults will light an indicator
when they are ACTIVE.
Illuminated Lamps:
WARNING - Indicates a failure has occurred, but the motorhome can be
operated without progressive damage. The motorhome should be serviced
to diagnose the failure and repaired at the first opportunity. The indication
is not considered an emergency.
CHECK ENGINE - Indicates the engine requires maintenance or fluids.
The motorhome should be serviced to correct the problem. If ignored, some
maintenance conditions can cause improper engine operation and even
progressive damage.
Solid Red STOP ENGINE - Indicates a major failure has occurred that can
result in progressive damage or affect safe operation of the motorhome. The
motorhome should be shut down as soon as safely possible and remain shut
down until the fault can be repaired.
Diagnostic Fault
Codes