PREVOST LE MIRAGE XLII BUS SHELLS Maintenance Manual Download

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SECTION 01: ENGINE

PA1564

1. ENGINE

This vehicle is powered by a 6-cylinder, four-
cycle, Detroit Diesel series 60 engine equipped
with an electronic control system (DDEC VI).

One engine displacement is used in the XLII
MTH Series 60 engines: 14.0 liters. Summary
information on the Electronic Control System is
given in this section.

Complete maintenance and repair information
on the engine will be found in the current
DETROIT

DIESEL

SERIES

2007

ON-

HIGHWAY

SERVICE

MANUAL

6SE2007. This

essential manual contains complete instructions
on operation, adjustment (tune-up), preventive
maintenance and lubrication, parts verification,
repair or replacement. This manual’s sections
cover complete systems such as:

•

Engine main assembly;

•

Fuel

system;

•

Lubrication

system;

•

Cooling

system;

•

Fuel, lubricating oil and coolant;

•

Air intake system;

•

Exhaust

system;

•

Exhaust gas recirculation components;

•

Electrical

equipment;

•

Operation and verification;

•

Engine

tune-up;

•

Preventive

maintenance;

•

Storage;

Refer to Series 60 DDEC VI Troubleshooting
Guide published by Detroit Diesel for more
complete information on diagnosis of
components and system problems.

Procedures for engine removal and installation
are given at the end of this section. The DDEC
system is self-diagnostic. It can identify faulty
components and other engine-related problems
by providing the technician with diagnostic
codes.

1.1 DDEC VI SYSTEM
DDEC VI (

etroit

iesel

lectronic

ontrol) is a

system that monitors and determines all values
required for the operation of the engine. A
diagnostic interface is provided to connect to an
external diagnosis tester. Besides the engine
related sensors and the engine-resident control

unit, the Motor Control Module (MCM), this
system has a chassis-mounted control unit for
vehicle engine management, the Common
Powertrain Controller (CPC). The connection to
the vehicle is made via a CAN interface which
digitally transmits the nominal values (e.g.
torque, engine speed specification, etc.) and the
actual values (e.g. engine speed, oil pressure,
etc.).

DDEC VI controls the timing and amount of fuel
injected by the electronic unit injectors (EUI).
The system also monitors several engine
functions using electrical sensors, which send
electrical signals to the Motor Control Module
(MCM). The MCM computes the electrical
signals and determines the correct fuel output
and timing for optimum power, fuel economy
and emissions. The MCM also has the ability to
display warnings or shut down the engine
completely (depending on option selection) in
the event of damaging engine conditions, such
as low oil pressure or high engine temperature.

1.2 HARNESSES
There are two major harnesses: the Engine
Harness (EH) and the Vehicle Interface Harness
(VIH). The Engine Harness is installed at the
Detroit Diesel factory and is delivered connected
to all engine sensors, the fuel injection system,
and the MCM.

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