Detroit Diesel MBE 900 Operator's Manual page 135

TROUBLESHOOTING
Problem—The Engine Fan Is Constantly On
Cause
The fan override switch is on.
The fan hub is damaged.
The parameter settings in the MCM or
CPC are incorrect.
Problem—Fuel Consumption Is Too High
Cause
The tires are not properly inflated.
The air filter and/or intake air system
is clogged.
The exhaust brake valve is
malfunctioning.
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DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION
Remedy
Check the operation of the fan override
switch.
Replace the fan hub
Have an authorized repair facility
reprogram the control unit.
Remedy
Check all tires for correct pressure.
Check the air restriction indicator.
Clean the intake air system and
replace the air filter if necessary.
Have an authorized repair facility
check the operation of the valve.
All information subject to change without notice. (Rev. 04/08)