Diagnostic Fault Codes; Eng Diagnostic; To Retrieve Active Fault Codes - Monaco DIPLOMAT 2004 Owner's Manual

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.
Three Lamps that Can Illuminate Are:
Engine Warning - Indicates a need to repair the fault at the first
opportunity.
Stop Engine - Indicates a need to shut down and remain shut down until
the fault can be repaired.
Maint Reminder - Indicates a maintenance function needs to be
performed.

Eng Diagnostic:

Uses the Engine Warning and Stop Engine dash warning lamps to emit
engine diagnostic codes.
NOTE: To retrieve engine diagnostic codes requires an Insight
Diagnostic Display or a Shorting Plug hooked to the engine
diagnostic harness.

To Retrieve Active Fault Codes:

1. Turn the ignition key OFF.
2. Hook up an Insight diagnostic display or Shorting Plug to the
engine diagnostic harness.
3. Turn the ignition key ON; observe Engine Warning and Stop
Engine lamps.
a. If no active codes are recorded, both lamps will remain
illuminated.
b. If an active code is recorded, both the Engine Warning and
Stop Engine dash warning lamps will illuminate briefly then
go out followed by the Engine Warning lamp illuminating
briefly. This is an indication one or more fault codes will be
displayed by the Stop Engine lamp. A three-digit code group
will display as a series of blinks-pause-blinks-pause-blinks-
pause. Record the code(s) as a three-digit number. Codes are
separated or ended by the Engine Warning lamp flashing once.
c. Use the Fast Idle switch to scroll through all ACTIVE faults.
d. When codes are retrieved, turn OFF the Engine Diagnostic switch.
e. Contact Cummins help line, 1-800-DIESELS, or an
authorized distributor.
CHASSIS INFORMATION
DIPLOMAT 2004
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