HANDBOOKon SEQUENT 24

TA010976 - N. 1 - 17 - 11 - 2004

M.T.M. s.r.l.

Via La Morra, 112062 - Cherasco (Cn) - ItalyTel. ++39 0172 48681Fax ++39 0172 488237

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INDEX

1. INTRODUCTION1.1 WHAT IS SEQUENT 24?1.2 MAIN DIFFERENCES WITH THE PREVIOUS SEQUENT SYSTEMS

2. UNDERSTANDING THE SEQUENT 24 SYSTEM2.1 SEQUENT 24 ECU2.2 CHANGEOVER SWITCH

2.2.1 CHANGEOVER SWITCH IN ITS PETROL POSITION

2.2.2 CHANGEOVER SWITCH IN ITS GAS POSITION

2.2.3 ERROR INFORMATION

2.3 GENIUS FOR SEQUENT 242.4 ENGINE WATER TEMPERATURE SENSOR2.5 FUEL “RAIL”2.6 BRC INJECTORS2.7 GAS PRESSURE AND TEMPERATURE SENSOR2.8 MAP SENSOR2.9 HARNESS

2.9.1 INJECTORS CUT

3. PROGRAMMING 3.1 FILE TYPES3.2 ASSISTED PERSONALISED PROCEDURE

4. TUNE-UP4.1 CHANGING OVER4.2 SELF-MAPPING

5. UTILITIES5.1 INFORMATION

6. PROBLEMS AND SOLUTIONS

7. ANNEXESA - LIST OF THE PINS AND THEIR FUNCTIONSB - LOCATION OF THE ECU PINSC - GENERAL ELECTRICAL DIAGRAMD - INJECTORS CUT DIAGRAME - PETROL INJECTOR CONNECTION SEQUENT 24 HARNESS RIGHT OR LEFTF - UNIVERSAL 4-PETROL INJECTOR CON-NECTION SEQUENT 24 HARNESS

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1. INTRODUCTION

1.1 WHAT IS SEQUENT 24? SEQUENT 24 is the BRC sequen-tial injection system in the gaseousphase that is easy to install, quickto map and low-cost. Its installationgets simpler owing to the new phi-losophy adopted for sensors andemulators. The SEQUENT 24actually does not contemplate anyadditional devices; the emulatorsare integrated in the ECU and thesensors are integrated in the maincomponents (Genius and RAIL).The connections are quicker owingto the specific connectors; moreo-ver, it is not necessary anymore toconnect the TPS signal whereasthe choice to connect the lambdaoxygen sensor signal is still optio-nal. For the RPM signal it will bepossible to choose a coil signal too,in addit ion to a standard RPMsignal or crankshaft position sensor

signal. The new SEQUENT 24 PCprogramme is easier to use andcompletely separated from thestandard SEQUENT and from theSEQUENT FAST, also as regardsthe filing of the mappings, but itanyway keeps their basic philo-sophy unchanged.

1.2 MAIN DIFFERENCESWITH THE PREVIOUSSEQUENT SYSTEMSIn the following table you will findthe list of the main differencesbetween standard SEQUENT /SEQUENT FAST and SEQUENT24:

Sensors• P1-MAP (case)• Tgas on the reducer

• P1-Tgas integrated on rail• Twater integrated on the reducer• MANIFOLD PRESSURE ONLY WHILESELF-MAPPING

Injectors Cut• Cut on the negative inside the ECU• Emulation with the Modular LD

• Cut on the POSITIVE inside the ECUand simultaneous for the 4 injectors (theorange wires do not enter the ECU)

Key contact and Petrol InjectorsPositive

• To connect to the key contact positive(brown) and to the petrol injectors positive(white-green)

• The key contact positive becomespetrol injectors positive that goes into andout from the ECU. ECU ignition only if thepetrol injectors positive is active

Communication • Active with key contact positive ON

• Active with the engine switched on;once it is connected it remains activeeven disconnecting the key contact (if thePC/ communication is not disconnected)

Changeover switch • 10 pins connected with the ECU • 3 pins connected with the ECU + onefor the level on the changeover switch

Screen • Connected with the ECU case with aspecific pin • Connected with the battery ground

TPS connection • Necessary or Optional • Not connected

RPM Connection • Necessary or Optional• It is possible to use the RPM countersignal, the crankshaft position sensorsignal (only one wire) or the coils negative)

Filing of the mappings• FSF+AAP file or only FSF for vehicleparameters and mapping

• FLS file for vehicle parameters andmapping.. • Separated from the previous Sequentsystems

Advance variator • Inside • Outside

SEQUENT / SEQUENT FAST SEQUENT 24

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2 UNDERSTANDINGTHE SEQUENT 24SYSTEM The SEQUENT 24 system main-tains, in general, the philosophy ofthe previous SEQUENT systems itderives from; it nevertheless intro-duces some changes and improve-ments as regards installation andoperation, as well as some modifi-cations in the components the BRCinstaller already knows well.

2.1 SEQUENT 24 ECUA detailed description of the ECUwould be beside the point of thishandbook. The main point is tounderscore that it is the operationalunit controlling the system. As theprevious ones it complies with theautomotive and EMC standardsand is tight. What distinguishes itfrom the previous ones is the fully-plastic case and the much morecompact dimensions advantagingits installation on the vehicle. Forinstallation please carefully followthe indications given for the stan-dard Sequent and Sequent Fastthat are already familiar to the BRCinstallers.

2.2 CHANGEOVER SWITCH Although it is similar to the typicaltwo-position changeover switchprovided with a buzzer, alreadyused on Sequent and SequentFast, the differences distinguishingit from the previous ones arenevertheless substantial. This newchangeover switch can be conside-red like a small ECU: it is not only aswitch regulating the petrol-gaschanging over, but it actually com-municates with the ECU and con-trols the visualisation of the gaslevel in the tank on the 4 greenLEDs.

2.2.1 CHANGEOVER SWITCH IN

ITS PETROL POSITION

With the button of the changeoverswitch in its petrol position, thevehicle works in forced petrol mode

(as in all the previous systems).The rectangular red LED lit informsthe user, while the gas level infor-mation disappears, that is to saythe four level green LEDs are off.

2.2.2 CHANGEOVER SWITCH IN

ITS GAS POSITION

In this position the vehicle starts upon petrol – the level LEDs are the-refore off – and, with the changeo-ver conditions configured by theprogramme attained (see chapter3.1 for further information), automa-tically changes over to GAS. Theuser is informed by the rectangularLED that first becomes orange andthen green (gas operation). Onlywhile running on gas the gas levelin the tank is visualised on the fourgreen LEDs.

2.2.3 ERROR INFORMATION

As it has already been undersco-red, this changeover switch is an“intelligent” device communicating

with the ECU. When the communi-cation fails, the two level centralgreen LEDs and the rectangularorange LED blinking inform theuser of the malfunction.In such conditions it is always pos-sible to force the petrol operationturning the switch in its petrol posi-tion, as it is possible to run on gaswith the changeover switch in itsgas position, though losing the levelinformation.In these cases it is recommendedto make a diagnosis and, if needbe, to repair/or replace the chan-geover switch.

2.3 GENIUS FOR SEQUENT24The pressure reducer is like theLPG GENIUS for SEQUENT, unlikeit is provided with a new water tem-perature sensor, that is not compa-tible with the ones of the previoussystems.

Pict. 1ECU Sequent 24

Pict. 2Changeover switch

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2.4 ENGINE WATER TEM-PERATURE SENSORThe water temperature sensor isdirectly fitted on the GENIUS on thewater side. The sensor is of theresistive two-wire type, based onan NTC thermistore. The gas chan-ging over strategies are groundedon the measurement of the enginewater temperature. This sensor dif-fers from the previous ones for itsnew mechanical structure: it isactually more compact and integra-tes inside it the part connected tothe sensor and to the connector.

2.5 FUEL “RAIL”It is the element bearing the injec-tors fitted. Unlike the previoussequential systems, the gas pres-sure and temperature sensor (notcompatible with the previoussystems) is also fitted on the rail inaddition to the injectors (BRC typeonly).

2.6 BRC INJECTORS The SEQUENT 24 equipment onlyuses BRC injectors. See in the fol-lowing table (pitc. 5) the powers, forguidance.

2.8 GAS PRESSURE ANDTEMPERATURE SENSORThis sensor is absolutely new, in acompact body and already integra-ted with the connector; it containsthe P1 gas pressure and tempera-ture sensor. The sensor is directlyfitted on the fuel rail. In this positionthe measurement of gas pressureand temperature is more carefuland allows rectifying the gas mixtu-res more rapidly.

MAP SENSORThe MAP sensor is identical withthe MAP sensor of the StandardSEQUENT, already familiar to theBRC installer. The material differen-ce distinguishing it from the othersystems is that in the SEQUENT 24this sensor is used ONLY DURINGTHE SELF-MAPPING. During the

Pict. 3Genius forSEQUENT 24 andengine water tem-perature sensor

Pict. 4Rail and Gas pres-sure and tempera-ture sensor

Pict. 6MAP sensor

Pict. 5LPG powers

LPG powers

Genius 800 Genius 1200 Genius 1500

Injectors Max Type Inducted - 26 kW/cyl. 30 kW/cyl.

Supercharged - 32 kW/cyl. 36 kW/cyl.

Iniettori Normal Type Inducted 17 kW/cyl. 21 kW/cyl. -

Supercharged 22 kW/cyl. 26 kW/cyl. -

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vehicle’s normal operation, theMAP is estimated: an approximatevalue of the manifold pressure istherefore visualised on theSEQUENT 24 interface.For the self-MAPPING the MAPsensor is provided with the pipesnecessary for the connection on thevehicle, inside the SEQUENT 24CALIBRATION KIT Code09SQ10990001.

2.9 HARNESS The SEQUENT 24 harness is slen-derer than the previous systems’ones. The 56-pole connector har-ness of the Standard SEQUENT isreplaced by the 24-pole connectorharness of the SEQUENT 24. Tomake installation easier the maindevices of the system are connec-ted through a specific connectorand the quantity of wires to weld isvery small.Shielded conductors have beenused in order to comply with theEMC standards. The connectors onthe harness are waterproof with theexception of the connector of thechangeover switch that is howeverhoused in the passenger’s com-partment and is therefore protectedfrom water. The injectors ought tobe cut with great care: the injectorscut is the main novelty of the wholesystem and of the harness.

2.9.1 INJECTORS CUT

Unlike the previous systems, theinjectors are cut on the positive:this allows having less wires ente-ring the ECU.Two wires are actually enough tocut all the injectors: theWhite/Green wire (injectors positi-ve, original equipment side) and theWhite/Brown wire (injectors positi-ve, injectors side).On the other hand, it won’t be pos-sible to change over from petrol togas and vice versa injector by injec-tor; the changing over could possi-bly be abrupt and we might changeover only while decelerating on

some vehicles.The White/Green wire has also thekey contact positive function, i.e. itis the wire that turns the gas ECUON. It is proper to bear in mind, inthis connection, that some vehiclesdo not actuate the injectors positiveuntil the starting up: it is not the-refore sufficient to turn the key con-tact on. In this case, the only way toturn the gas ECU on is to start up.As while programming, the gasECU needs this wire to be high-potential, programming will be car-ried out with the vehicle running.The injectors positive normally isnot low-potential as soon as theengine and the key contact areswitched off, but it can remain highfor some seconds with the vehicleswitched off. In this case, the ECUtoo wil l remain ON for someseconds.The White/Brown wire is directlyconnected with the petrol injectors.It supplies tension on the injectorspositive while running on petrol,whereas it takes this power supplyoff while running on gas, in order tocut injectors.It is highly recommended to useright and left harnesses specificallyconceived for Sequent 24 whene-ver it is possible. They actuallyallow making quick connectionswith the injectors, without weldingand cutting down any error possibi-lity.It is necessary not to mix up theright with the left harnesses and tocarefully follow the instructions sup-plied with these harnesses.The exchange of the two harnessesbrings about the vehicle’s malfunc-tion both on petrol and on gas andthe short-circuit of the injectors pilo-ting outputs of the petrol ECU tothe posit ive. This short-circuitstrains the petrol ECU only whenthe engine is running (it is anywaynot possible to start up).Furthermore, the petrol ECU isgenerally protected against thistype of short circuit. Nonetheless it

is recommended to act very cau-tiously. In particular, it is recom-mended not to insist excessively ifthe vehicle does not start up afterreconnecting the injectors, but tocheck immediately whether theconnection harness is correct.

Should the right and left harnessesnot be used, it is anyway possibleto use the universal harness, fol-lowing the enclosed instructionswith the utmost care.In particular, bear in mind that:

- The White/Green wire can begenerally connected only with apositive wire coming from the petroloriginal harness, even if it is best, ingeneral, to reunify all the positivesof the injectors (ECU side) on thiswire, in order not to supply overcur-rent to one single wire of the petroloriginal harness.

- All the positives of the petrol injec-tors ought to be cut, by disconnec-ting them from the original positiveand connected only with theWhite/Brown wire. Indeed, shouldthe original positive still get to apetrol injector, the injector will alsowork while running on gas and the-refore provoke the bad combustionof the attendant cylinder.

- The petrol injectors positive to becut ought to be as close as possibleto the petrol injectors. If we cut thepositive far from the petrol injectors,we actually run the risk of cutting, inaddition to the injectors, otheractuators or sensors of the vehiclesupplied with the same wire of theoriginal equipment.

- The injectors negatives ought tobe cut and connected, as in thepast, to the violet (petrol ECU side)and orange (injectors side) wiresand ought to be connected in thesame order, from 1 to 4, as the gasinjectors.At the end of this handbook (Annex

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B on page 14) you wil l f ind anexplanatory diagram regarding theinjectors cut.The petrol injectors are emulatedthrough special coils similar to thecoils used in the Modular LD of theSequent systems that are fittedinside the ECU.The codes of the connection har-nesses for the 4 petrol injectorsare listed below:

06LB50010121 – UNIVERSAL Harness

06LB50010122 – RIGHT Harness

06LB50010123 – LEFT Harness

3 PROGRAMMINGThe software structure is maintai-ned as similar as possible to theBRC sequential systems already onthe market and familiar to the BRCinstaller. Only the material differen-ces introduced for SEQUENT 24will be therefore here-after indica-ted.

3.1 FILE TYPESThe SEQUENT 24 ECU is pro-grammed by downloading two diffe-rent types of files:1. File .S192. File .FSLthe information necessary for thevehicle’s operation is contained inthe file. FSL.

3.2 ASSISTED PERSONALI -SED PROCEDURELet’s find out, in brief, about theassisted personalised programmingprocedure. The procedure is to becarried out with the engine swit-ched on and the changeover switchon petrol mode (the programme willshow the installer when changingover to gas).The steps to follow are not farremoved from the ones analysedfor the Standard SEQUENT and forthe SEQUENT FAST, that’s whyyou are kindly requested to refer tothe attendant handbooks for a moredetailed description.Assisted personalised procedure

The main novelt ies have beenintroduced in the equipment typescreen and in the RPM calibrationscreen.The equipment type screen (Picture8 pag. 8) requires to enter an extrainformation: the vehicle volume.The RPM calibration screen(Picture 9 pag. 8) allows selecting acoil RPM signal besides selectingand calibrating a normal RPMsignal or crankshaft position sen-sor.

WARNING: by selecting anRPM signal from the negati-

ve coil, the RPM won’t be correctlyvisualised in all the working condi-t ions. In some of them as, forexample, in the cut-off, the visuali-

sed RPM signal could not corre-spond to the vehicle’s real one;nevertheless it doesn’t affect thevehicle’s working.

4 TUNE-UPThis chapter will only examine thedifferences with the previousSEQUENT systems, otherwise youare kindly requested to make refe-rence to the handbooks on theStandard SEQUENT andSEQUENT FAST.

4.1 CHANGING OVER The changing over operation hassubstantial differences distingui-shing it from the previous Sequentsoftware, owing to the completelydifferent injectors cut on Sequent

Beginning of theprocedure

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Selection of the equipment and injectors type

RPM calibration

Lambda calibration (optional)

Save file

Self-mapping

Save file

End of the procedure

ASSISTED PERSONALISED PROCEDURE

Pict. 7

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Pict. 10

24. In particular, the injectors aresimultaneously cut and changeovercan be rough while in the StandardSequent or Sequent Fast it wasclean in all conditions. In thesecases it is proper to avoid changingover in the most critical conditionsthat normally are idle speed or con-ditions requiring much torque to theengine.

It is obvious from the first screen(Picture 10) that changing over isalways a function of the enginewater temperature measured throu-gh the special sensor positioned onthe Genius Reducer for Sequent24.On Standard Sequent and SequentFast the changing over temperaturewas the gas one unless you con-nect to the vehicle’s original enginewater temperature sensor.

As a rule, the changing over is divi-ded into two sections according asyou change over with the warmvehicle (temperature higher than50°C) or the cool vehicle (tempera-ture higher than 40°C).In the referred example the chan-ging over conditions are attained if:1. 60 seconds at least have passedafter the vehicle starting up and gastemperature ranges from 40° and50°C.2. 5 seconds at least have passedafter the vehicle starting up and gastemperature is higher than 50°C.By clicking on the ADVANCED but-ton it is possible to set some para-meters affecting changing over orchanging back to petrol for lack offuel.In particular, it is possible to distin-guish the conditions for changingover from petrol to gas (Box 1 ofPict. 11) from the conditions forchanging over from gas to petrol(Box 2 of Pict. 11).

In particular, the following configu-rations are possible:- “Changing over at the idle speed”

Pict. 8

Pict. 9

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indicates that changing over can bepossible at RPM lower than 4000and with a MAP value close to theidle speed one.- “Changing over in deceleration”indicates that changing over can bepossible in deceleration conditions,that is to say with RPM rangingbetween 2000 and 4000 and aMAP value close to the idle speedone. In these conditions the torquerequired to the engine is practicallynull; this obviously allows avoidingjerks during this phase. (This chan-ging over is very similar to theFlying Injection system). Changingover in deceleration is suitable forvehicles whose OBD detects miss-fires. On these vehicles, petrol-gaschanging over and gas-petrol chan-ging back are particularly delicateand they are therefore recommen-ded only in deceleration conditions.(NOTE: the manual action on thechangeover switch has anywaypriority on the software; by forcingthe changeover switch on its petrolmode the gas-petrol changing overis therefore immediate even if thechanging over in deceleration isconfigured in the software).

- “Always changing over” indicatesthat changing over is possible in allconditions and therefore at anyRPM and engine load values.

The standard configurations are:- Petrol-Gas changing over (Box 1of Pict. 11): changing over in dece-leration- Gas-Petrol changing over (Box 2of Pict. 11): always changing over

In the “Changing back to petrol forlack of gas” Box there are all theparameters controlling this function.They are the same parametersalready seen for the StandardSequent and Sequent FAST. Everytime a new mapping is created,some given values are already con-figured; normally they do not needany modification.

Pict. 11

Pict. 12

The “Changing back to petrol at theidle speed” Box allows changingback to petrol every time the engineis below certain revs; this functionis identical with the Sequent oneand is only used on vehicles whosereturn to idle speed is so criticalthat it can provoke the engine stallas a consequence.

4.2 SELF-MAPPINGThe self-mapping can be carriedout from the tune-up function too.The procedure is the same as theassisted personalised one. Theonly novelty is the initial question

(Pict. 12) asking the installer todecide whether self-mapping fromthe CURRENT MAP, that is the onealready existing in the ECU or fromthe BASIC MAP, that is by usingthe standard maps existing on thePC.

WARNING: It is necessary toconnect the manifold pressu-

re.

5 UTILITIESThis chapter will only examine thedifferences with the previousSEQUENT systems, otherwise youare kindly requested to make refe-rence to the handbooks on theStandard SEQUENT andSEQUENT FAST.

5.1 INFORMATIONThis section allows controlling theupdating of the software versionsexisting on the PC that can bedownloaded on the ECU, visuali-sing the software name and version(Picture 13).

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Pict. 13

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6 PROBLEMS AND SOLUTIONSThis chapter supplies some useful indications for the installer to solve some problems that could arise with thisnew system.

The ECU does not communicate

• Lack of power supply to the ECU• The communication port configured onthe PC is not correct• The communication cable is faulty

• Turn the engine on• Verify whether the configured COM portis correct in UTILITIES-COMMUNICA-TION• Replace the communication cable

The ECU does not switch off• The communication with the PC is stillactive

• Disconnect the communication cable orexit from the SEQUENT 24 programmeand wait till the ECU is switched off

The changeover switch does not visua-lise the GAS level

• The changeover switch is in its petrolposition (level LEDs are switched off)• The changeover switch does not commu-nicate (level central LEDs are blinking)

• Changeover to gas and verify the levelvisualisation.• Verify the changeover switch harness orreplace the changeover switch. In thesecases, the cause could also be the ECU.Therefore verify whether the ECU com-municates with the PC interface and, ifnecessary, try to replace it.

The changeover switch does not com-municate

• The level green central LEDs and theorange rectangular LED are blinking

• In this condition the vehicle goes on run-ning on petrol or on gas according to thechangeover switch position. Neverthelessthere is no information on the operationand it is therefore proper to verify the har-ness or replace the changeover switch.

The changeover switch does not switchon

• The changeover switch harness is cut off• The 5A fuse is cut off• The changeover switch fails• The ECU does not switch on

• Verify the changeover switch harnesscontinuity.• Replace the 5A fuse• Replace the changeover switch.• Verify the ECU operation.

The vehicle works wrongly on gas• The injectors positives are not cut correc-tly

• Make sure you have cut all the petrolinjectors positives• Verify you have cut as close as possibleto the injectors.

The Petrol and GAS injectors do notinject simultaneously (you will find ithard to make the self-mapping)

• The injectors positives are not cut correc-tly

• Try to start the vehicle up with the gasinjectors disconnected: if the vehiclestarts up (even running bad) then there isa problem in the injectors positive cut.

The vehicle does not start up• Inversion between RIGHT and LEFT har-ness

• Verify whether the injectors are connectedcorrectly. If the RIGHT harness and the LEFTharness are inverted, trying to start up, thetension on the White/Green wire is still low.

The vehicle does not change over togas.

• The injectors are not driven to theground.•The battery bond fails.

• Verify the connection of the B1 Pininjectors ground wire.• Verify the connection of the C8 Pin bat-tery ground wire.

The ECU does not switch on or it resetsitself in the gas operation

• The connection to the battery positive islacking or is cut off.• The connection to the injectors positive islacking or is cut off.

• Verify the connection of the A1 Pin bat-tery positive wire.• Verify the connection of the A7 Pininjectors positive wire.

WHAT’S HAPPENED? WHAT TO DOPROBLEM

The vehicle changes over to petrol incut-off.

• The RPM signal is taken from the coilnegative. This signal is set to zero in cut-off.

• Take an RPM signal different from thecoils one.

The vehicle stalls while changing overto gas.

• The 15A fuse is cut off.• Any of the actuators relay wires isdisconnected.• The relay fails.• The White/Green wire is inverted with theWhite/Brown one (in this case you willhear the relay ringing).

• Verify the 15A fuse.• Verify the connections on the actuatorsrelay.• Replace the relay.• Verify the connection of theWhite/Green and White/ Brown wires.

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1 2 3 4 5 6 7 8

A +VBATT INJ1- GAS INJ2- GAS INJ3- GAS INJ4- GAS COMINJPET-OUT COMINJPET-IN RPM-IN

B GND-INJ INJ1PET-IN INJ2PET-IN INJ3PET-IN INJ4PET-IN LAMBDA-AIN MAP-AIN P1-AIN

C GAS SV WATER TEMP. K-LINE SWITCH-LINE SENSPOWER LAMBDA-AOUT TGAS-AIN GNDBATT

ANNEXES A

Pins

ANNEXES B

Location of the ECU pins

N. PIN OFTHE ECU

N. PIN OF THEREMOTE

CONNECTORWIRE COLOUR WIRE NAME DESCRIPTION

A1 Note 1 Red +VBATTECU power supply from battery /

injectors current blow-byB1 Ring Black GND-INJ Gas injectors ground

C1 1 Green/Black EVGAS Solenoid valve piloting outlet

A2 1 White/Green INJ1-GAS Gas injector 1 piloting outlet

B2 B1 Violet INJ1BENZ-IN Petrol injector 1 inlet

C2 2 Yellow TEMP.ACQUA Water temperature

A3 1 White/Green INJ2-GAS Gas injector 2 piloting outlet

B3 B2 Violet INJ2BENZ-IN Petrol injector 2 piloting intlet

C3 4 White LINEA-KK line diagnostic

serial communicationA4 1 White/Green INJ3-GAS Gas injector 3 piloting outlet

B4 C1 Violet INJ3BENZ-IN Petrol injector 3 piloting intlet

C4 2 Green SWITCH LINEChangeover switch

serial communicationA5 1 White/Green INJ4-GAS Gas injector 4 piloting outletB5 C5 Violet INJ4BENZ-IN Petrol injector 4 piloting intlet

C5 Note 2 Red SENSPOWER5V power supply for sensors and

changeover switch

A6 A2 White/Brown COMINJPET-OUT Petrol injectors common positive,injectors side

B6 - Yellow LAMBDA-AIN Lambda oxygen sensor analog inlet

C6 Light blue LAMBDA-AOUT Lambda oxygen sensor analog outlet

A7 A1 White/Green COMINJPET-INPetrol injectors common positive,

petrol ECU side (or +V key)

B7 4 White MAP-AIN MAP analog inlet

C7 4 White TGAS-AIN Temperature analog inlet

A8 - Grey RPM-IN RPM inlet

B8 2 Green P1-AIN Gas pressure analog inlet

C8 Note 3 Black GNDBATT ECU and sensors ground

Note 1: The A1 pin of the ECU (battery positive) is connected with the pin 3 of the connector for the communication with thePC.Note 2: The C5 pin of the ECU (sensors positive) is connected with the following pins of the remote connectors:• Pin 3 of the gas pressure and temperature sensor• Pin 4 of the changeover switch• Pin 2 of the MAP sensorNote 3: The C8 pin of the ECU (ECU and sensors ground) is connected with the following pins of the remote connectors:• Pin 1 of the gas pressure and temperature sensor• Pin 3 of the changeover switch• Pin 1 of the MAP sensor• Pin 1 of the engine coolant temperature sensor• Pin 1 of the gas level sensor

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LPG SEQUENT 24WIRING DIAGRAM

+ -

1 2 3 4

1 2 3 4

123

Relé

"I1""I2"

"I3""I4"

(-) (+)

Sequent 24ECU

✂ ✂✂✂

Pos

itive

Neg

ativ

eO

rang

e

Vio

let

Pos

itive

Neg

ativ

e

Pos

itive

Neg

ativ

e

Pos

itive

Neg

ativ

e

✂

Whi

te/B

row

nW

hite

/Gre

enTo connect during is made

of mapping of the car

Caution:- Follow carefully the petrol injectors sequence and gas injectors as indicated in the diagram.- Never connect to the earth the front and back solenoid valve wires.- To allow a correct diagnosis of the front solenoid valve and the back one never connect them together.- Never substitute the fuses with others of superior carrying capacity.

Battery

BlackBlack

RedRed

LPGSolenoid Valve

Water temperaturesensor

"GENIUS SEQUENT 24"Reducer

Petrolinjectorssequence

Gasinlet

GAS injectors sequence

Gas temperaturesensor and gaspressure sensor

1st PetrolInject.

2nd PetrolInject.

3rd PetrolInject.

4th PetrolInject.

Ora

nge

Vio

let

Ora

nge

Vio

let

Ora

nge

Vio

let

Ora

nge

Vio

let

EuropaMultivalve

Lam

bda

Oxy

gen

sens

or

Ligh

t Blu

e

Gre

y

Yel

low

Level SensorConnector

Back SolenoidValve Connector

Fuse5A

Fuse15A

DiagnosticPoint

c/o switchconnector

rpm

Sig

nal

ANNEXES CGeneral electrical diagram

14

✂

✂

✂

✂V

iole

t

Ora

nge

Vio

let

Ora

nge

Vio

let

Ora

nge

Vio

let

Ora

nge

Vio

let

Vio

let

Vio

let

Vio

let

Ex

Ex

Ex

Ex

ITAL

YM

.T.M

.

ET 9

8

Whi

te/B

row

n

Gas

1st

Inje

ctor

Gas

2nd

Inje

ctor

Gas

4th

Inje

ctor

Gas

3rd

Inje

ctor

A6

B5

B4

B3

B2

PE

TR

OL

EC

U

A5

Whi

te/G

reen

A4

A3

A2

Whi

te/G

reen

Whi

te/G

reen

Whi

te/G

reen

LPG

Sol

enoi

d V

alve

SE

QU

EN

T 2

4E

CU

Ext

erna

l Rel

é on

the

wiri

ng S

eque

nt 2

4

Pos

itive

Pet

rol

Inje

ctor

C1

A7

Whi

te/G

reen

Grenn/Black

Gro

und

+12V

Afte

r C

onta

ct

Eur

opa

Mul

tival

ve

1st P

etro

lIn

ject

.2n

d P

etro

lIn

ject

.3r

d P

etro

lIn

ject

.4t

h P

etro

lIn

ject

.

ANNEXES D

Injectors cut diagram

15

✂✂

✂✂

✂

✂

✂

✂

ANNEXES E4-Petrol injector connection Sequent 24 Harness Right or Left

ANNEXES F

Universal 4-Petrol injector connection Sequent 24 Harness

Sequent 24

1° Injector 2° Injector 3° Injector 4° Injector

Neg

ativ

eP

ositi

ve

Vio

let

Ora

nge

Vio

let

Ora

ngeV

iole

t

Ora

nge

Vio

let

Ora

nge

Inj. 1 Petr.

Inj. 1 Petr.

Inj. 2 Petr.

Inj. 2 Petr.

Inj. 4 Petr.

Inj. 4 Petr.

Inj. 3 Petr.

Inj. 3 Petr.

White/GreenWhite/Brown

SEQUENT 24

1°Injector

2°Injector

3°Injector

4°Injector