Cayman 2006 Chassis Information — Section 10 • 253
The Cummins diesel engine is a 6-cylinder, in-line engine. An electronic fuel control system supplies fuel to
the cylinders. This allows for precise fuel delivery, resulting in effi cient operation, as well as built-in diagnostics
to monitor engine operation.
The engine electronics also enable the use of programmable monitoring features that may cause limited
engine power/vehicle speed when certain conditions arises. These features limit the operation of the engine when
conditions that may damage the engine are encountered. These conditions may include such event 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 when corrective action is not taken immediately in such
conditions. Operation of the engine 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 or WARNING), pull off the road as soon as it is safely possible and evaluate the situation.
INFORMATION:
Refer to the OEM for additional information concerning the operation, description,
maintenance, and warranty information for the engine.
Diagnostic Fault Codes
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 fi rst opportunity.
The indication is not considered an emergency.
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.
Flashing red STOP ENGINE - Indicates the engine control system has started the shut down sequence.
The shut down timer will give the operator 30 seconds to fi nd a safe stopping point.
CHECK ENGINE - Indicates the engine requires maintenance or fl uids. The motorhome should be
serviced to correct the problem. If ignored, some maintenance conditions can cause improper engine
operation and even progressive damage.
To Retrieve Active Fault Codes:
1. Turn the ignition key OFF.
2. Turn the ignition key ON immediately apply three full throttle application.
3. Observe Check Engine and Stop Engine lamps.
a. If no active codes are recorded, both lamps will remain illuminated.
b. If an active code is recorded, both lamps will illuminate momentarily, then fl ash the recorded fault.
c. When codes are retrieved, turn OFF the Engine Diagnostic switch.
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