Detroit Diesel MBE4000 Bedienungs- und Montageanleitung
NUMBER: 1–MBE 4000–07 S.M. REF.: seetable1 ENGINE: MBE 4000 DATE: February 2007
SUBJECT: LOW POWER CONCERN
PUBLICATION: EPA-04 MBE 4000 SERVICE MANUAL (6SE412)
The service manual has been restructured to add a “Low Power Concern” chapter. Previously the
troubleshooting concerns were found in chapter 15, now each troubleshooting concern has its own
chapter.
Service Manual Chapter Decsription
15 Troubleshooting The Electronic Engine Control System
16 General Mechanical Troubleshooting
17 Low Power Concern
Table 1 Troubleshooting Chapters
Chapter 17 includes factors that affect wheel horsepower and other associated low power information.
ADDITIONAL SERVICE INFORMATION
Additional service information is available in the Detroit Diesel MBE 4000 Service Manual, 6SE412.
Thenextrevisiontothismanualwill include the revised information.
15 TROUBLESHOOTING THE ELECTRONIC ENGINE
CONTROL SYSTEM
Section Page
15.1 ELECTRONIC ENGINE CONTROL SYSTEM ......................................... 15- 3
(Rev. 2007) All information subject to change without notice.
15-2 From Bulletin 1–MBE 4000–07 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION
MBE 4000 SERVICE MANUAL 6SE412
15.1 ELECTRONIC ENGINE CONTROL SYSTEM
When the electronic engine control system detects a fault, it broadcasts a message on the datalink.
The dash display will show the code "ECU 128," indicating there is an engine fault.
NOTE:
To read the complete fault code, refer to the MBE Electronic Controls Troubleshooting
Guide (6SE422) or bring the vehicle to an authorized repair facility. Complete fault
codes can be read using minidiag2.
All information subject to change without notice. (Rev. 2007)
6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION From Bulletin 1–MBE 4000–07 15-3
15.1 ELECTRONIC ENGINE CONTROL SYSTEM
(Rev. 2007) All information subject to change without notice.
15-4 From Bulletin 1–MBE 4000–07 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION
16 GENERAL MECHANICAL TROUBLESHOOTING
Section Page
16.1 MECHANICAL TROUBLESHOOTING .................................................... 16-3
(Rev. 2007) All information subject to change without notice.
16-2 From Bulletin 1–MBE 4000–07 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION
MBE 4000 SERVICE MANUAL 6SE412
16.1 MECHANICAL TROUBLESHOOTING
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.
Problem - The Engine Will Not Crank
Cause Remedy
The batteries are damaged or weak. Test the batteries. Replace them, if needed.
The ignition switch is damaged. Replace the ignition switch.
The battery cables are damaged and/or corroded. Replace the battery cables.
The starter is damaged and/or worn. Have an authorized dealer replace the starter.
The clutch or transmission is damaged. Bring the vehicle to an authorized dealer for service.
There is internal damage to the engine. Bring the vehicle to an authorized dealer for service.
Problem—The Engine Turns Over Slowly
Cause Remedy
The batteries are damaged or weak. Test the batteries. Replace them, if needed.
The ignition switch is damaged. Replace the ignition switch.
The battery cables are damaged and/or corroded Replace the battery cables.
The starter is damaged and/or worn. Have an authorized dealer replace the starter.
The engine oil does not meet the correct specifications. Change the engine oil, using the correct type of oil.
The transmission fluid does not meet the correct
specifications. Change the transmission fluid, using the correct type
of fluid.
All information subject to change without notice. (Rev. 2007)
6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION From Bulletin 1–MBE 4000–07 16-3
16.1 MECHANICAL TROUBLESHOOTING
Problem—The Engine Cranks, But Won't Start
Cause Remedy
The batteries are damaged or weak. Test the batteries. Replace them, if needed.
The cranking speed is not set correctly. Bring the vehicle to an authorized dealer for service.
No intake air preheater is installed, and it is too cold to
start without one. Install an intake air preheater.
The intake air preheater is malfunctioning. Check the intake air preheater, and replace it, if
necessary.
The camshaft TDC sensor and/or the crank angle
position sensor are out of adjustment.
Push both sensors into their holes as far as they will go.
If this does not solve the problem, bring the vehicle to an
authorized dealer for service.
The camshaft TDC sensor and/or the crank angle
position sensor are damaged. Bring the vehicle to an authorized dealer for service.
There is air in the fuel system. Check the fuel lines for air pockets. Bleed the fuel
system and start the engine.
The air filter is clogged. Clean or replace the air filter.
The fuel filter is clogged. Replace the filter element.
The exhaust brake valve is malfunctioning. Have an authorized dealer check the operation of the
valve.
The valves are not adjusted properly. Check the valve lash.
There are other problems in the fuel system. Bring the vehicle to an authorized dealer for service.
Problem—The Engine Starts Only After Cranking for a Long Time
Cause Remedy
The fuel tank is low or empty. Add fuel and bleed the fuel system, if necessary.
There are leaks in the fuel lines. Check the fuel lines for leaks and repair them, if
necessary.
The fuel filter is clogged. Replace the filter element.
The fuel line, the fuel pre-filter, or the screen in the fuel
tank is blocked. Clean and bleed the system. Have the fuel lines and
filters checked by an authorized dealer.
The camshaft TDC sensor and/or the crank angle
position sensor are out of adjustment.
Push both sensors into their holes as far as they will go.
If this does not solve the problem, bring the vehicle to an
authorized dealer for service.
The camshaft TDC sensor and/or the crank angle
position sensor are damaged. Bring the vehicle to an authorized dealer for service.
There are other problems in the fuel system. Bring the vehicle to an authorized dealer for service.
(Rev. 2007) All information subject to change without notice.
16-4 From Bulletin 1–MBE 4000–07 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION
MBE 4000 SERVICE MANUAL 6SE412
Problem—The Engine Starts, But Dies
Cause Remedy
The fuel tank is low or empty. Add fuel and bleed the fuel system, if necessary.
The fuel filter is clogged. Replace the filter element.
The fuel line, the fuel pre-filter, or the screen in the fuel
tank is blocked. Clean and bleed the system. Have the fuel lines and
filters checked by an authorized dealer.
The camshaft TDC sensor and/or the crank angle
position sensor are out of adjustment.
Push both sensors into their holes as far as they will go.
If this does not solve the problem, bring the vehicle to an
authorized dealer for service.
The camshaft TDC sensor and/or the crank angle
position sensor are damaged. Bringthevehicletoanauthorizeddealerforservice.
The constant-throttle valves are malfunctioning. Bring the vehicle to an authorized dealer for service.
There are other problems in the fuel system. Bring the vehicle to an authorized dealer for service.
Problem—The Engine Fan Doesn't Work
Cause Remedy
The fan hub is damaged. Replace the fan hub.
The fan wiring is damaged. Repair the fan wiring.
The parameter settings in the PLD or VCU control unit
are incorrect. Have an authorized dealer reprogram the control unit.
Problem—The Engine Fan Is Constantly On
Cause Remedy
The fan override switch is on. Check the operation of the fan override switch.
The fan hub is damaged. Replace the fan hub
The parameter settings in the PLD or VCU control unit
are incorrect. Have an authorized dealer reprogram the control unit.
Problem—Fuel Consumption Is Too High
Cause Remedy
The tires are not properly inflated. Check all tires for correct pressure.
The air filter and/or intake air system is clogged. Check the air restriction indicator. Clean the intake air
system and replace the air filter if necessary.
The fuel filter is clogged. Replace the filter element.
The exhaust brake valve is malfunctioning. Have an authorized dealer check the operation of the
valve.
The engine performs poorly, or does not develop full
power. The remedies are listed in "The Engine Performs Poorly,
Does Not Develop Full Power."
All information subject to change without notice. (Rev. 2007)
6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION From Bulletin 1–MBE 4000–07 16-5
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