Detroit Diesel MBE 400, Technician Manual

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CODES PRELIMINARY
4.3 TROUBLESHOOTING OF PERFORMANCE CODES
Performance codes indicate the detection of mechanical failures by the DDEC system. The
response would be to troubleshoot a PID or SID as follows.
PERSONAL INJURY
To avoid injury, use care when working around moving belts
and rotating parts on the engine.
PERSONAL INJURY
Diesel engine exhaust and some of its constituents are known
to the State of California to cause cancer, birth defects, and
other reproductive harm.
Always start and operate an engine in a well ventilated
area.
If operating an engine in an enclosed area, vent the
exhaust to the outside.
Do not modify or tamper with the exhaust system or
emission control system.
NOTE:
The EGR systems in the MBE 4000 and MBE 900 engines contain fewer components
and use simpler control logic than the other series of Detroit Diesel engines. Therefore,
using the DTCs should be the
primary means of solving troubleshooting problems.
The Detroit Diesel Diagnostic Link (DDDL) snapshots are not as dynamic on the MBE
engines and are usually just used to supplement the DTCs when troubleshooting.
4-8
All information subject to change without notice. (Rev. 5/05)
7SE940 0505 Copyright © 2005 DETROIT DIESEL CORPORATION