Detroit Diesel MBE4000 Instrucciones de funcionamiento e instalación

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.

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)

15.1 ELECTRONIC ENGINE CONTROL SYSTEM

(Rev. 2007) All information subject to change without notice.

16 GENERAL MECHANICAL TROUBLESHOOTING

Section Page

16.1 MECHANICAL TROUBLESHOOTING .................................................... 16-3

(Rev. 2007) All information subject to change without notice.

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)

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.

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)

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