Troubleshooting - Detroit Diesel EPA07 MBE 4000 Operator's Manual

TROUBLESHOOTING

TROUBLESHOOTING
In addition to operating the engine
carefully and maintaining it properly,
make sure to correct any malfunction
promptly.
When the electronic engine control
system detects a fault, it broadcasts
a message on the datalink. The
dash display will show the code
"Motor Control Module (MCM) 128,"
indicating there is an engine fault.
Important: To read the complete
fault code, bring the vehicle to an
authorized dealer. Complete fault
Problem - The Engine Will Not Crank
Cause
The batteries are damaged or weak.
The ignition switch is damaged.
The battery cables are damaged
and/or corroded.
The starter is damaged and/or worn.
The clutch or transmission is
damaged.
There is internal damage to the
engine.
118
DDC-SVC-MAN-0041
codes can be read using the Nexiq
DDR or DDDL 7.0 version or later.
For fault codes and their meanings,
see the next section in this guide.
The tables that follow are designed
to identify the causes of common
problems, suggest further checks and
appropriate remedies. When dealer
service is necessary, this is mentioned
in the table.
NOTE:
Remember to follow all cautions when
troubleshooting the engine.
Test the batteries. Replace them, if
needed.
Replace the ignition switch.
Replace the battery cables.
Have an authorized repair facility
replace the starter.
Bring the vehicle to an authorized
repair facility for service.
Bring the vehicle to an authorized
repair facility for service.
All information subject to change without notice.
Copyright © 2009 DETROIT DIESEL CORPORATION
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