Scania DI12, DC12 Operator's Manual

Name: Scania DI12
Brand: Scania
SKU: 4535323
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	IMPORTANT INFORMATION
	When work is being carried out on the engine such as adjusting drive belts, changing oil or
!	adjusting the clutch, it is important not to start the engine. The engine may be damaged and
!	there is
	A SERIOUS RISK OF INJURY

For this reason, always secure the starting device or disconnect a battery cable before working on the engine.

This is especially important if the engine has a remote starter or automatic starting.

This warning symbol and text is reproduced beside those maintenance points where the risk of injury is particularly great.

Operator’s Manual

DI12, DC12 EMS with S6/PDE

Industrial engine

opm_d12ind_en-GB01 1 920 785

COMMISSIONING REPORT - WARRANTY

When the commissioning report has been filled in and sent to Scania, you have a 1-year warranty from the date of commissioning.

Also fill in the particulars below as this can make things easier if you need to contact for example a service workshop.

Engine number

Date of commissioning

User’s name and address

Signature

Engine type

Variant

Engine type and variant are indicated on the engine type plate

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Foreword

This Operator’s Manual describes the handling and maintenance of Scania DC12 and DI12 Industrial Engines with EMS S6/PDE injection systems.

The engines are of direct-injection, liquid-cooled, four-stroke, 6-cylinder inline diesel type. These engines have turbochargers and charge air coolers; see page 14.

Common applications are as power units in construction machines, generator sets, earth-moving, railway and forestry machines as well as in irrigation systems.

The engines can have different output and speed settings.

The normal output setting of the engine (performance code) is indicated on the type plate, see page 14.

Note: Only standard components are described in the Operator’s Manual. Please see the manufacturer’s instructions regarding special equipment.

In order to obtain the best value and service life from your engine, there are several points you should bear in mind:

-Read the manual before starting to use the engine. Even though you may have experience of Scania engines you may find new information in this Operator’s Manual.

-Follow the maintenance instructions. Good working order and service life are ensured if maintenance is carried out according to the instructions.

-In particular, read the safety information starting on page 6.

-Get to know your engine so that you know what it can do and how it works.

-If necessary, contact an authorised Scania workshop. They have special tools, genuine Scania parts and staff with training and practical experience of Scania engines.

Note: Always use genuine Scania parts during service and repair so as to keep your engine in the best possible working order.

The information in this manual was correct at the time of going to press. However, we reserve the right to make alterations without prior notice.

Important

During the warranty period, only genuine Scania parts may be used during service and repair; otherwise the warranty will be invalidated.

2	© Scania CV 2009

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Contents

Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Environmental responsibility	.........................4
Certified engines ............................................	5
Scania industrial and marine engine warranty
for industrial engines.......................................	6
Safety information ........................................	10

Safety precautions before running . . . . . . . . .11 Safety precautions for materials handling . . . .12 Safety precautions for care and maintenance .12

Type designations . . . . . . . . . . . . . . . . . . . . . 14

Engine management system, EMS . . . . . . . 16

Troubleshooting using flash codes for the

EMS control unit . . . . . . . . . . . . . . . . . . . . . . .20

Overview of flash codes for the EMS

control unit . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Troubleshooting using flash codes for the

EMS coordinator . . . . . . . . . . . . . . . . . . . . . . .22

Overview of flash codes for the EMS coordinator . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Starting and driving . . . . . . . . . . . . . . . . . . .	24
First start .......................................................	24
Checks before running .................................	25
Starting the engine ........................................	25
Starting at low temperatures . . . . . . . . . . . . . .	26
Running ........................................................	26

Engine speed . . . . . . . . . . . . . . . . . . . . . . . . . .26 Limp home mode . . . . . . . . . . . . . . . . . . . . . . .27 Coolant temperature . . . . . . . . . . . . . . . . . . . .27 Oil pressure . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Stopping the engine ......................................	29
Checks after running ....................................	29
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . .	30
Engines with few hours of operation ...........	30
Maintenance schedule ..................................	31

Lubricating oil system . . . . . . . . . . . . . . . . . 32

Oil grade .......................................................	32
Oil analysis . . . . . . . . . . . . . . . . . . . . . . . . . . .	32
Checking the oil level ...................................	33
Checking oil level during operation . . . . . . . .	33
Oil change ....................................................	33

Maximum angles of inclination during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Cleaning the oil filter unit ............................	34
Renewing the oil filter ..................................	36

Cooling system . . . . . . . . . . . . . . . . . . . . . . . .	36
Checking coolant level .................................	36
Checking coolant ..........................................	37

Checking the corrosion protection . . . . . . . . .39 Changing the coolant . . . . . . . . . . . . . . . . . . .39

Cleaning the cooling system .........................	40
Internal cleaning . . . . . . . . . . . . . . . . . . . . .	. .41
Air cleaner . . . . . . . . . . . . . . . . . . . . . . . . . .	. 42
Test reading of vacuum indicator .................	42
Cleaning the air cleaner coarse cleaner ........	42
Cleaning or changing filter element .............	42
Renewing the safety cartridge ......................	43
Fuel system . . . . . . . . . . . . . . . . . . . . . . . . . .	. 44
Checking the fuel level .................................	44
Changing the fuel filter .................................	44
Electrical system . . . . . . . . . . . . . . . . . . . . .	. 46
Checking the electrolyte level in batteries	...46
Checking the state of charge in batteries ......	46
Cleaning batteries .........................................	46
Renewing the battery ....................................	47
Checking coolant level monitor ...................	47
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . .	. 48
Checking the drive belt .................................	48
Look for leakage, rectify as necessary .........	49
Check and adjust valve clearance .................	50
Checking and adjusting the unit injector
rocker arms ...................................................	52
Renewing (or cleaning) the closed
crankcase ventilation valve ..........................	56

Preparing the engine for storage . . . . . . . . . 57

Preservative fuel . . . . . . . . . . . . . . . . . . . . . . .57 Preservative oil . . . . . . . . . . . . . . . . . . . . . . . .58 Preparation for storage . . . . . . . . . . . . . . . . . .58 Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59 Taking out of storage . . . . . . . . . . . . . . . . . . .59

Technical data . . . . . . . . . . . . . . . . . . . . . . . . 60

Fuel ...............................................................

Alphabetical index . . . . . . . . . . . . . . . . . . . . . 64 Scania Assistance . . . . . . . . . . . . . . . . . . . . . . 65

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Environmental responsibility

Scania has always been very much at the leading edge when it comes to developing and producing engines which are as environmentally friendly as possible.

Major progress has been made on reducing harmful exhaust emissions as required to be able to meet the stringent environmental standards stipulated on almost all markets.

At the same time, we have been able to maintain high quality in terms of performance and operating economy for Scania Industrial and Marine Engines.

To preserve these qualities throughout the entire service life of the engine, it is important for the operator/owner to follow the instructions on running, maintenance and the choice of fuel and oil as outlined in the manual.

Other efforts to preserve the environment we all share are possible by ensuring that the person carrying out servicing and maintenance always makes sure that environmentally hazardous waste after servicing and repairs (oil, fuel, coolant, filters, batteries, etc.) is dealt with and disposed of in accordance with applicable environmental standards.

On a number of pages, this Operator’s Manual contains specially highlighted text with instructions to help protect our environment during certain servicing and maintenance work.

See example

Help protect our environment!

Use a container to avoid spillage when bleeding and changing components.

4	© Scania CV 2009

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Certified engines

Emissions-certified engines have been approved in accordance with a special certification standard. The certified engines supplied by Scania meet the most stringent emissions standards which apply on European (EU) and nonEuropean (USA) markets.

Scania guarantees that all the engines it supplies of a certified type are equivalent to the engine approved for certification.

The engine comes with a special certification plate which indicates the certification rules (standard) to which the engine has been approved. See page 14.

The following is required for the certified engine to meet emissions standards once it has been commissioned:

-Servicing and maintenance must be carried out in accordance with the instructions in this manual.

-Only genuine Scania parts are to be used.

-Injection equipment is to be serviced by an authorised Scania workshop.

-The engine must not be modified with equipment not approved by Scania.

-Seals may be broken and setting data edited only once approval has been granted by Scania in Södertälje. Changes may be made by authorised personnel only.

-Changes which affect the exhaust system and intake system must be approved by Scania.

Otherwise, the instructions in the manual in respect of running, care and maintenance of the engine shall apply. The safety precautions described over the next four pages must also be observed.

Important! If servicing and maintenance are not carried out as specified above, Scania can no longer guarantee that the engine will comply with the certified design, nor can it take responsibility for any damage that occurs.

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Scania industrial and marine engine warranty for industrial engines

Emission Control Systems Warranty

Important! Only applicable to engines used in the U.S.A.

Table of contents
General Warranty Provisions .........................	6
Warranty Period .............................................	7
Parts covered by the Warranty .......................	7
General Warranty Limitations .......................	8
Specific Warranty Exclusions .......................	9
Customer Support ...........................................	9

Emission Control System Warranty Statement

General warranty provisions

The emission control systems of your new Scania Industrial and Marine ("Scania") industrial diesel engine were designed, built and tested using genuine parts, and were certified as being in conformity with federal emission control regulations. Scania warrants to the original owner, and to each subsequent owner, of a new Scania industrial diesel engine that the engine:

1.Was designed, built and equipped so as to conform at the time of sale with all applicable regulations under Section 213 of the Clean Air Act 42 U.S.C. § 7547, and all applicable regulations under Chapter 1 and 2, Part 5, Division 26 of Health and Safety Code, and;

2.Is free from defects in material and workmanship which would cause such engine to fail to conform to applicable regulations for its warranty period.

6	© Scania CV 2009

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Warranty Period

This warranty shall apply for one of the following periods, whichever occurs first:

•3,000 hours of operation, or

•Five years of use

The warranty period shall begin:

•"On the date the engine is delivered to the first retail purchaser, or

•"If the engine is placed in service for demonstration purposes prior to sale at retail, on the date the engine is first placed in service.

Parts covered by the Warranty

The following is a list of parts considered to be part of the Emission Control Systems covered by the Emission Warranty for Scania industrial engines which were built to conform to federal emission control regulations:

1.Fuel injection system

2.Air intake system

•Intake manifold

•Turbocharger system

•Charge air cooler system

3.Exhaust manifold

4.Combustion chamber

•Piston

•Cylinder head

5.Components used in the above mentioned systems

Important! This list does not include all expendable maintenance parts. Expendable emission related parts requiring scheduled maintenance are warranted until their first scheduled replacement point. See Specific Warranty Exclusions below.

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General Warranty Limitations

To retain the dependability of the exhaust emission control originally built into your Scania industrial diesel engine, it is essential that the engine is installed according to Scania installation instructions and emission certificates.

In addition, you are responsible for the performance of all scheduled maintenance and necessary repairs on your new Scania industrial diesel engine. Scania may deny a warranty claim if your failure to perform maintenance resulted in the failure of the warranted part, listed under Parts covered by the Warranty above.

Receipts covering the performance of regular maintenance should be retained in the event questions arise concerning maintenance. The receipts should be transferred to each subsequent owner of the engine with the emission warranted engine.

The Warranty covers the cost of repair and replacement parts and services of warranted components and systems performed by an authorized Scania distributor or dealer using genuine Scania parts. You may elect to have maintenance, replacement or repair of these components and systems performed by any repair establishment or individual without invalidating the Warranty.

The use of other than Scania replacement parts also does not invalidate the warranty on other components unless such parts cause damage to warranted parts. However, the cost of such services or parts will not be covered by the Warranty.

WARNING!Use of replacement parts which are not of equivalent quality may impair the effectiveness of emission control systems. Accordingly, it is recommended that only Scania repair or replacement parts be used for maintenance, repair or replacement of emission control systems. If other than Scania parts are used for maintenance, repair or replacement, the owner should obtain assurance that such parts are warranted by their manufacturer to be equivalent to genuine Scania parts

8	© Scania CV 2009

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Specific Warranty Exclusions

This warranty does not cover:

1.Malfunctions in any part caused by any of the following: misuse, abuse, improper adjustments, modifications, alteration, tampering, disconnection, improper or inadequate maintenance, or use of fuels not recommended for the engine as described in the Operator's Manual.

2.Engine installation, including cooling system, intake system and exhaust system installation, that is not completed in accordance with the Scania installation instructions and emissions certificate for this engine type.

3.Damage resulting from accidents, acts of nature or other events beyond the control of Scania.

4.The replacement of expendable maintenance items such as filters, hoses, belts, oil, thermostat, exhaust system and coolant made in connection with scheduled maintenance services once these parts have been replaced.

5.Replacement items which are not genuine Scania parts or not authorized by Scania.

6.Inconvenience, loss of use of the engine or commercial loss.

7.Any engine on which the actual use cannot be accurately determined.

8.Any engine operating outside the United States.

Customer Support

In the event that you do not receive the warranty service to which you believe you are entitled under the Warranty, or if you need additional support or information concerning the Warranty, please contact:

Scania USA, Inc

Address: 121 Interpark Blvd, suite 601, 78216, San Antonio, Texas

Mailing address: 121 Interpark Blvd, suite 601, 78216, San Antonio,

Texas

Telephone: +1 210 403 0007

Fax: +1 210 403 0211

E-mail: contact@scaniausainc.com

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Safety information

General

This Operator’s Manual contains safety information which is important so as to avoid both personal injury and damage to the product/other property. See also page 1.

The text highlighted in text boxes on the right of a number of pages is important for engine function and in order to avoid damage to the engine. If these instructions are not followed, your warranty may be invalidated.

See example

Similar text may also appear in the text column, and in this instance it will be marked Note: or Important!.

Important

Only use genuine Scania fuel filters.

The warning text found in text boxes on the right of a number of pages which is marked with a warning triangle and starts with WARNING is extremely

important and warns you of serious engine faults or incorrect handling which may lead to injury.

See example

A list of the safety precautions to be followed when running and maintaining Scania engines can be found on the next three pages. Similar text can often be found at the relevant maintenance points, and here different levels of importance are attached to such text in accordance with the above description.

All points are marked !, so as to indicate how important it is to read through each point in this section.

WARNING

Block the starting device when working on the engine.

If the engine starts accidentally, there is a

SERIOUS RISK OF INJURY.

For safety reasons, smoking is not allowed:

•In the vicinity of the engine and in the engine room

•When fuelling and close to the filling station

•When working on the fuel system

•In the vicinity of inflammable or explosive material (fuel, oils, batteries, chemicals, etc.)

10	© Scania CV 2009

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Safety precautions for running the engine

Daily inspection

Always visually inspect the engine and engine compartment before starting the engine and once you have stopped the engine after running.

This will enable you to easily detect fuel, oil or coolant leaks, or any other abnormalities which may require rectification.

Refuelling

There is a risk of fire and explosion when refuelling. The engine must be stopped and smoking is not allowed.

Do not overfill the tank due to a risk of expansion, and close the filler cap properly.

Use only fuel recommended in the service literature. Fuel of the wrong quality can cause the engine to malfunction or stop by preventing the injection pump and injectors from operating as they should.

This can cause damage to the engine and, possibly, injury.

Hazardous gases

Only start the engine in a well ventilated area. The exhaust fumes contain carbon monoxide and nitric oxides, which are toxic.

If it is run in a enclosed space, there should be an effective device to extract exhaust gases and crankcase gases.

Starter lock

If the control panel is not fitted with a key operated switch, there should be a lock on the engine room to prevent unauthorised starting of the engine.

Alternatively, a lockable on/off master switch or battery master switch can be used.

Starter spray

Never use starting spray or similar as a starting aid. This can cause an explosion in the intake manifold and possible injury.

Running

The engine must not be run in environments where there is a risk for explosion as all of the electrical or mechanical components can generate sparks.

Approaching a running engine always poses a safety risk. Parts of the body, clothes or dropped tools can get caught in rotating parts such as the fan and cause injury.

For personal safety all rotating parts and hot surfaces must therefore be shielded as much as possible.

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Safety precautions for handling materials

Fuel and lubricating oil

All fuels and lubricants and many chemicals are flammable. Always follow the instructions on the relevant packaging.

All work on the fuel system must be done with the engine cold. Fuel leaks and spillage on hot surfaces can cause fire.

Store soaked rags and other flammable materials safely so as to avoid spontaneous combustion.

Batteries

The batteries contain and emit oxyhydrogen gas, particularly during charging, and this gas is flammable and highly explosive. There must be no smoking, naked flames or sparks near the batteries or the battery compartment.

Incorrect connection of a battery cable or jump lead can cause a spark, which in turn can cause the battery to explode.

Safety precautions for care and maintenance

Stop the engine

Always stop the engine before maintenance and servicing unless stated otherwise.

Prevent unwanted starting by taking out the ignition key where applicable and disconnecting the power using the master switch or battery master switch and locking them. Also put up a warning sign somewhere appropriate, indicating that work is in progress on the engine.

Working with a running engine always poses a safety risk. Parts of the body, clothes or dropped tools can get caught in rotating parts and cause injury.

Hot surfaces and fluids

There is always a risk of sustaining burns when an engine is hot. Therefore, take care not to come into contact with manifolds, the turbocharger, the sump, hot coolant and oil in pipes and hoses.

Chemicals

Most chemicals such as glycol, corrosion inhibitors, preservative oils, degreasing agents, etc. are hazardous to health. Always follow the safety precautions on the relevant packaging.

Some chemicals, such as preservative oil, are also flammable.

Store chemicals and other materials which are hazardous to health in approved containers, marking them clearly and storing them where they are inaccessible to unauthorised persons. Always hand in leftover or used chemicals to an authorised waste disposal contractor.

Lifting the engine

The engine lifting eyes must be used when lifting the engine. Check first that your lifting devices are in good condition and of the correct size to lift the weight.

Extra equipment on the engine can alter the centre of gravity, which is why you may need additional lifting devices to balance the engine correctly and lift it safely.

Never work underneath a suspended engine!

Batteries

The batteries contain a highly corrosive electrolyte (sulphuric acid). Take care to protect your eyes, skin and clothes when charging or handling batteries.

Wear protective gloves and goggles.

If the acid splashes on your skin, wash it off with soap and copious amounts of water. If acid splashes in your eyes, flush them immediately with copious amounts of water and contact a doctor.

Dispose of used batteries through an authorised waste disposal contractor.

12	© Scania CV 2009

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Electrical system

The engine must be stopped and the power disconnected using the master switch or battery master switch before working on the electrical system.

External power supplies to extra equipment on the engine must also be disconnected.

Electric welding

When carrying out welding work close to and on the engine, remove the battery leads and the cables to the alternator. Also remove the multi-pin connector to the control unit.

Connect the weld clamp to the component to be welded and close to the welding point, never to the engine or in such a manner that the current can pass over to a mounting.

When you have finished welding, connect the cables to the alternator and control unit before connecting the batteries.

Cooling system

Never open the coolant filler cap if the engine is hot. Hot coolant or steam may spray out and cause burns.

If you have to open or remove a cooling system component when the engine is hot, open the cap very carefully and slowly to relieve the system pressure before removing the cap. Wear gloves as the coolant is still very hot.

Dispose of used coolant through an authorised waste disposal contractor.

Fuel system

Always wear gloves when looking for leaks or carrying out any other work on the fuel system. Also wear protective goggles when testing injectors.

Fuel escaping at high pressure can penetrate tissues and cause serious injury.

Never use non-genuine parts in the fuel and electrical systems as genuine parts are designed and manufactured to minimise the risk of fire and explosion.

Lubrication system

Hot oil can cause burns and skin irritation. Therefore, avoid skin contact with hot oil.

Make sure that there is no pressure in the lubricating system before starting work on it. Never start or run the engine with the oil filler cap removed, as this may cause oil to be thrown out.

Dispose of used oil through an authorised waste disposal contractor.

Before starting

Fit all removed shields before starting the engine again. Check that you have not left any tools or other objects on the engine.

Never start the engine without the air filter fitted. There is a risk of objects being sucked into the compressor impeller or of injury if you come into contact with it.

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Type designations

The engine type designation indicates engine type, size and applications in code form.

The type designation and engine serial number are specified on a type plate affixed to the right-hand side of the flywheel housing. The engine number is also stamped on the right-hand side of the cylinder block. See the arrow in illustration.

Made by

Type	DI12 54A
Engine No	6521399
Output. 331	kW 2200	rpm.
Output	kW	rpm.

308 664

DI 12 54 A

Version

DC	Supercharged diesel engine with air-cooled charge air cooler
DI	Supercharged diesel engine with liquid-cooled charge air cooler

Displacement in whole dm3

Performance and certificate

Indicates, together with the application code, the normal gross engine output. The actual output setting of the engine is indicated on the engine card.

Application

A For general industrial use

14	© Scania CV 2009

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11	12

1, 2 3


	10	9
	10	9	8	7	6	5



18

	16

					14
				15	14

	The illustrations show a normal version of a DI12-engine.
	Your engine may have different equipment from that illustrated.
1.	Type plate	7.	Oil filter unit		14.	Fuel pump with hand pump
2.	Engine number, stamped	8.	Oil dipstick		15.	Starter motor
3.	into the cylinder block	9.	Draining, engine oil		16.	S6 control unit
3.	Coolant pump	10.	Oil cooler		17.	Fuel filter
4.	Automatic belt tensioner	11.	Turbocharger		18.	Charge air cooler
5.	Draining, coolant	12.	Oil filler
6.	Oil filter	13.	Hydraulic pump
			© Scania CV 2009			15

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EMS engine management system

This engine has an electronic management system, EMS (Engine Management System) with unit injectors (PDE) which provide each cylinder with the right amount of fuel at the right time in all operating situations.

The EMS system consists of a control unit (S6) and sensors for speed, charge air temperature and pressure, coolant temperature, oil pressure, accelerator pedal/throttle actuation which constantly emit signals to the control unit. With the aid of this input data and the programmed control software, the correct fuel amount and correct injection time are calculated for each unit injector under the specific operating conditions.

The EMS system sensors can also be used to emit signals to the instruments in the instrument panel.

The control unit constantly checks the sensors to make sure they are operational.

The control unit contains monitoring functions to protect the engine in the event of a fault which would otherwise damage it. In the event of a fault, for example alarm level for low oil pressure or high coolant temperature, the S6 control unit sends a CAN message to a coordinator.

The main task of the coordinator is to pass on data by means of CAN communication from the engine control unit to other control units and signals to gauges and lamps in the instrument panel. The coordinator also has monitoring functions.

16	© Scania CV 2009

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When the EMS control unit or the coordinator detects a fault, the diagnostics lamp on the instrument panels(s) comes on, and it stays on as long as the fault is active. At the same time, a fault code is generated which can be read off via the coordinator on the diagnostics lamp in the form of a flash code when the diagnostics switch is activated. A flash code may consist of a number of different fault codes.

Diagnosis and troubleshooting using Scania EMS Display is described in the Operator’s Manual for Scania EMS Instrumentation.

If the torque reduction function is activated, the amount of fuel and the engine power output are reduced to 70%, and if the engine shutdown function is activated, the engine is switched off at programmed alarm levels.

A separate PC-based diagnostics program is used to read off the contents of the flash codes. For an in-depth analysis of fault codes, contact an authorised Scania dealer.

Reading off the fault codes, and descriptions of these, are also covered in a separate document in the workshop manual, Engine Management System EMS-S6: Troubleshooting.

Only authorised personnel are allowed to carry out diagnostic procedures and program changes.

The positions of the sensors which emit signals to the control unit are shown in the illustrations on page 16.

See pages 20 and 22 for a description of how to read off flash codes.

See pages 21and 23 for a list of flash codes for the control unit and coordinator.

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Positions of sensors for EMS with S6 on DI12

4	3

1.Oil pressure sensor

2.Charge air temperature and pressure sensor

3.Coolant temperature sensor

4.Engine speed sensor (2)

18	© Scania CV 2009

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Location of sensors for EMS with S6 on DC12 1

4	3

1.Oil pressure sensor

2.Charge air temperature and pressure sensor

3.Coolant temperature sensor

4.Engine speed sensor (2)

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Troubleshooting using flash codes for the EMS control unit

•The diagnostics lamp on the instrument panel(s) always comes on for two seconds when the system is powered up.

•As soon as a fault is detected by the control unit, it is stored in the EEPROM fault code memory and the diagnostics lamp on the instrument panel(s) comes on.

•The diagnostic lamp will stay on for as long as a fault is active. Even if the lamp has gone off and the fault is no longer active, the code can generally be read off by following the instructions below.

Reading off control unit fault codes

1.Turn on the ignition.

2.Activate the diagnostics switch to the left to view the flash codes for the control unit (EMS).

3.A fault code will then flash on the diagnostics lamp. This flash code consists of long flashes (approximately 1 second long) and short flashes (0.3 seconds long). Long flashes are equivalent to tens and short flashes to units.

Example: long - short - short = fault code 12.

4.Repeat this procedure until the first flash code is repeated. This means that the entire fault code memory has been flashed out. If the fault code memory is empty, only one long flash approximately 4 seconds long will be given.

5.See the flash code table on the next page for a description and to locate the fault.

6.In order to obtain further information on the fault code, the PC-based diagnostics tool or Scania EMS Display must be used. Contact an authorised Scania workshop.

7.When a fault has been rectified the fault code can be erased as described below.

Clearing fault codes

1.Switch off the ignition. If there is dual instrumentation the ignition must be switched off on both panels.

2.Activate the diagnostics switch in the same direction as the flash codes indicate, i.e. to the right for the coordinator (COO) or to the left for EMS.

3.Switch on the ignition and at the same time keep the diagnostics switch activated, to the right (COO) or to the left (EMS), for 3 seconds.

4.This will erase passive fault codes which can be read off via flash code for the relevant system. The rest of the fault codes will remain in the EEPROM and can only be deleted using the PC tool.

20	© Scania CV 2009

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