program 99

Scania

Issue 1 en

Part No.1 588 726

Installation instructions - Industrial engines

19:01-19

Scania DEC2 control systemOEM engines CV AB, Sweden, 2001-01:1

2Program 99

THE INSTALLATION CONTRACTOR IS RESPONSIBLE FOR

A FUNCTIONAL INSTALLATION IN ACCORDANCE WITH SCANIAS INSTALLATION

INSTRUCTIONS.

CLASSIFICATION APPROVAL MAY DEPEND ON THE CLASSIFICATION SOCIETY ON EACH

Address inquiries to:SCANIA CV ABIndustrial and Marine EnginesService SupportS-151 87 SdertljePhone +46 (0)8 553 810 00Fax +46 (0)8 553 831 80 1fnContentsImportant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Scania DEC2 control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Sensors and monitors on the DC12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Sensors and monitors on the DI12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Sensors and monitors on the DI14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Sensors and monitors on the DI9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DEC2 control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Electrical connections on all engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Electrical connections for all-speed engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Electrical connections for fixed speed engines . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99Note: Although the DEC2 system is protected against the environmental factors described above, all measures must be taken to avoid them.

- All cables to the DEC-2 must be connected either to battery (-) or battery (+). Any cables left open in order to obtain a (-) function will act as aerials and can cause interference in the system.

connected to the same battery supply circuit as the DEC2 unit.

Loose battery or alternator connections. Faulty voltage regulator in alternator. Faulty or inferior battery charger. Short circuits Extreme heat High voltages High levels of vibration

voltage spikes: Solenoids, relay windings, electromagnets Important No work may be carried out on the DEC2 control unit or sensor and wiring. Doing so can affect the

control unit safety system and cause injury to the operator and damage to the engine or the equipment being powered by it.

Never splice a damaged wire. Renew the complete wiring, otherwise the function and safety of the system may be affected.

Sensors for the DEC2 control system are intended for use in the DEC2 only.

The following points must be considered to avoid damaging the DEC2 control unit: The control unit must be fitted so that the casing is electrically isolated from its surroundings. Make sure that cables to battery and alternator are connected correctly before starting the engine. The power supply to the unit must be turned off completely before disconnecting wires to the control

unit. Disconnect the DEC2 control unit when rapid charging the battery. Disconnect the battery when carrying out electric welding.

Basic principles for electrical connection of the DEC2 system

The following factors often cause problems to electronic systems:

EMI (electromagnetic interference)

- Use separate supply leads from the battery to the DEC2 control system and make sure they are as short as possible.

The following may cause problems with high 19:01-19 Scania CV AB, Sweden, 2001-01:1 3

Program 99delivery. The location of the junction box on the engine is illustrated on pages 5, 6, 7 and 8.

Cable harnessThe cable harness for connecting to the control unit is 6 m long (standard length) and connected to the junction box on delivery.

WARNING!! WARNING!!No equipment besides that specified may be connected to the DEC2 cable harness. Doing so will risk injury to the operator and damage to the engine or the equipment being powered by it. Sensors and monitors for the DEC2 system must not be used for other purposes.All sensors and monitors required for the DEC2 control system are located on or are connected to the engine on delivery. Their locations on the engine are illustrated on pages 5, 6, 7 and 8.

Junction boxThe junction box is located on the engine on

short cable harness with two extra connectors, one 12-pin and one 8-pin. These connectors are used for connecting the power supply, main indicator lamp, switch for lamp test/fault code test and other switches and throttle actuation sensor or trim potentiometer if fitted. There is also a 2-pin connector that can be used for a suppressor when necessary.Scania DEC2 control system

1. PC for diagnosis and program revisions2. Junction box on engine3. Coolant pump4. Engine speed5. Oil pressure6. Charge air temp7. Boost pressure

8. Connectors to battery, warning lamp, switches for lamp test/fault code test, throttle actuation sensor, trim potentiometer, function switches

9. EDC electronic control unit10. Fuel shut-off valve

Sensor On the control unit end of the cable harness is a 4 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99

Sens1. Boost pressure2. Charge air temperature3. Oil pressure4. Junction box5. Coolant temperature6. Engine speed19:01-19ors and monitors on the DC12 Scania CV AB, Sweden, 2001-01:1 5

Program 99

Sens1. Boost pressure2. Charge air temperature3. Oil pressure4. Junction box5. Coolant temperature6. Engine speed6ors and monitors on the DI12 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99

Sens1. Boost pressure2. Junction box3. Charge air temperature4. Oil pressure5. Coolant temperature6. Engine speed19:01-19ors and monitors on the DI14(locations identical to DC14) Scania CV AB, Sweden, 2001-01:1 7

Program 99

Sens1. Charge air temperature2. Coolant temperature3. Junction box4. Boost pressure5. Oil pressure6. Engine speed8ors and monitors on the DI9(locations identical to DC9) Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 991. Bracket for insulating the control unit2. Calibration potentiometer3. Multipin connector4. Communication / Diagnostics port5. LED display6. DIP switches, under rubber cover7. Calibration test point8. Joint sleeve9. Hose for boost pressure from engineDEC2 control unit19:01-19 Scania CV AB, Sweden, 2001-01:1 9

Program 99Location- The control unit should be located away from

the engine but not farther away than that the accompanying cable harness will reach.

- Place the control unit upright as illustrated to avoid condensation in the boost pressure hose and allow it to run off the cover.

- The LED display must be easy to read while the engine is running and when performing fault diagnosis.

- The COMM/DIAG port must be easily accessible for connecting.

Note: The COMM/DIAG port may be used by qualified personnel only.

- Place the control unit so that the multipin connector, the connector for the boost pressure line, the adjusting screw and the calibrating pin on the control unit are easily accessible.

- The control unit must not be located in close vicinity to electrical fields.

Note: The control unit must be calibrated after renewing it or the injection pump. See Adjustment and calibration, 03:02-03.

Avoid earthing the control unitThe cover on the control module with program version 7.0 is connected directly to the negative terminal on the circuit board. In this way, the cover is connected directly to battery minus.This has been done to further protect the control unit against electrical interference.To avoid earth faults, especially on two-pin installations, the DEC2 control unit cover must be electrically isolated from e.g. the hull of a ship.This is important to consider even when renewing a control unit with program version V6.0, as only control units with program V7.0 are supplied as a spare part.

Boost pressure hoseWe recommend fitting the boost pressure hose at an angle with the jointing sleeve at the lowest point. Open the jointing sleeve at regular intervals, preferably with the engine running under light load, to drain away any condensation.

Note: Whenever removing or renewing the control unit, disconnect the boost pressure hose at the jointing sleeve. Do not disconnect the hose from the control unit as the connector can be damaged very easily.10 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99Electrical connections on all engines

GeneralBefore starting an engine with DEC2 control unit, a number of electrical connections on both the standard version and with optional equipment must be made.It is mainly the wiring from the open 12-pin connector (C36) and the 8-pin connector (C90) in the cable harness from the control panel that must be connected on installation.Leads and components for the cable harness to the control panel are not included in the delivery from Scania with the exception of the terminal sleeves and terminals to be connected to the accompanying cable harness.It is essential that a contact pressing tool of high quality be used for assembling terminals to the customised cable harness.We recommend using the DEUTSCH hand pressing tool, part no. DTT-16-00.

Cables to terminals C36 and C90:Leads and other equipment for the control panel are not included in the delivery from Scania.Concerning the different functions of the switches (both standard and optional) and how they are connected, refer to the next page.The wiring diagrams can be found on pages 19 to 25.Switches S16, S17, S18, S19 and S24 are to be placed on the control panel if used.Switch S20 (lamp test/fault code test) should be place close to the control unit so that the LEDs on the DEC2 unit can be seen while turning on the switch.

1. Scania standard cable harness2. Customised cable harness

Concerning connections to terminals C36 and C90: See pages 19 and 2319:01-19 Scania CV AB, Sweden, 2001-01:1 11

Program 99 2,90-2,95 V DC for maximum engine speed (control lever in maximum position)

- Maximum input impedance for analogue converter: 10 kohms

- Idling switch (ISS) input, C10, must be connected to battery + (24V DC). Otherwise, the engine speed will not be able to exceed approximately 1200 rpm (fixed engine speed).

- The throttle actuation sensor magnetisation, C8, must not be connected. See diagram.

DEC2 signal input can be damaged.

Note: If the throttle actuation signal is delayed or is outside permitted limits when the DEC2 unit is powered up, it may result in a fixed engine speed of 900 rpm + engine speed droop or closedown depending on the position of DIP switch 5ON = fixed engine speedOFF = closedownMeasure the input signal on the DEC2 unit.Electrical connections for all-speed engines

Connecting alternative signal source to the DEC2 throttle actuation signal inputThe diagram below shows how to connect an alternative signal source.The difference in voltage between pin B8 (signal) and pin A7 (reference) must be adjusted to the following values:

0,40-0,42 V DC for idle speed (control lever in min. position)

- It is also essential the signal source be electrically insulated from the DEC2 throttle actuation signal input in order to protect against EMI (electromagnetic interference), earth faults and other interference that may cause problems with performance/function.

Warning! If the voltage exceeds 5V DC, the 12 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99C36-4 Power Control

Alt 2: Allows temporary use of power/torque curve 2 2)

Battery - Allows temporary use of power/torque curve 1

C36-5S18-1 3)

Run/Stop

Battery + Drive position

Battery -Turns off the power stage for the control and the engine stops. The control unit is still supplied with voltage

C36-6S19-1 1)

Speed Hold 4)

Battery + Maintains the engine speed at that specified by the potentiometer when engaged.

Battery - No speed hold. Engine running in normal mode.Connecting standard sensor to the DEC2 throttle actuation signal input

The Scania accelerator pedal sensor (APS) can be used as a throttle actuation sensor for various applications, since the signal input in the DEC2 unit is adapted to the specifications of this sensor.On delivery, the accelerator pedal sensor also includes the necessary contact housings and cable terminals for connecting it to a customised cable harness.

Concerning the connection of a Scania APS, see page24

Description of connections to terminals C36 and C90

Connection Switch or terminalSwitch position or connection to Function description

C36-1 C46-2 Battery + Voltage supplyC36-2 C47-2 Battery - System earth

C36-3S16-1 1)

Droop/Isochronous

Battery + Isochronous control

Battery - Control of speed droop

S17-1 1) Battery +Alt 1: Allows temporary use of power/torque curve 2 2)19:01-19 Scania CV AB, Sweden, 2001-01:1 13

Program 99

Connection Switch or terminalSwitch position or connection to Function descriptionC36-7

S20-1

Lamp test/Fault code test

switch

Battery +

The control unit first performs a test of all the LEDs and the operators warning lamp for 2 seconds. After which a fault code will be displayed with the control unit LEDs for 5 seconds. The system returns to normal mode for 2 seconds and the procedure will be repeated if the switch is turned on. See Troubleshooting.

Battery - Switch position for normal mode.

C36-8 W14-2Warning lampBattery + via warning lamp

Operators main warning lamp should be placed on the control panel. It is essential the current strength be limited to 500 mA so that it does not affect the function of the interface.

C36-9

C189-2Idle/Safety

switchBattery +

Connect to the idle/safety switch C189-2 when the Scania accelerator pedal sensor is included in the system.

- Battery +If another signal source is used, connect it directly to battery +. See circuit diagram and specification on page 12.

C36-10

C190-A / D35Voltage supply

for throttle actuation

sensor

TPSE in control unit

Connect to terminal C190-A for the throttle actuation sensor when the Scania accelerator pedal sensor is included in the system.

- -

Do not connect if another signal source is used.

C36-11

C190-B / D35Return from

throttle actuation

sensor

TPSR in control unit

Connect to terminal C190-B for the throttle actuation sensor when the Scania accelerator pedal sensor is included in the system.

- -

Connect as reference for the analogue converter if another signal source is used. See circuit diagram and specification on page 12.

C36-12

C190-C / D35Signal from

throttle actuation

sensor

TPSS in control unit

Connect to terminal C190-C for the throttle actuation sensor when the Scania accelerator pedal sensor is included in the system.

- -

Connect as reference for the analogue converter if another signal source is used. See circuit diagram and specification on page 12.14 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 991) Optional switch.2) Possibility of using power/torque curve 2 is an option on OEM equipment.3) This switch should be used for normal shut-down of the engine without turning off the battery

voltage.4) The two reserved inputs must not consume any current but be connected to battery -.

Note: It is essential that all connections to the separate inputs on the control unit (C36-3, C36-4, C36-5, C36-6, C36-7, C36-9, C90-3, C90-4) are connected to either battery + or battery - and not left open to avoid interference that affect the function of the circuit. The connections left open will act as aerials for interference, despite them being internally connected to battery -.

C90-1Fuel shut-off

valve EHAB or ELAB

Battery +

If the injection pump is not equipped with fuel shut-off valve, connect to battery + when the engine is to be run. The fuel shut-off valve can also be used as a shut-down device. In this case, a separate switch and relay must be coupled into the circuit. For emergency shut-down only.

C90-2Fuel shut-off valve EHAB

onlyBattery -

If the injection pump is not equipped with fuel shut-off valve, connect to battery + when the engine is to be run. The fuel shut-off valve can also be used as a shut-down device. In this case, a separate switch and relay must be coupled into the circuit. For emergency shut-down only.

C90-3 Reserved 4) Battery - -C90-4 Reserved 4) Battery - -

C90-5 - -Load indicator signal (LIS), 0 - 4 VDC, corresponding to 0 - 100% power output from engine. Signal uses TPSR (C36-11) as reference earth.

C90-6 - - Connects to TPSR (C36-11) when load indicator signal (LIS) is usedC90-7 - - ReservedC90-8 - - Reserved

Connection Switch or terminalSwitch position or connection to Function description19:01-19 Scania CV AB, Sweden, 2001-01:1 15

Program 99C36-5 Run/Stop Battery -

Turns off the power stage for the control and the engine stops. The control unit is still supplied with voltage

C36-6S19-1 1)

Speed Hold 4)

Battery + Maintains the engine speed at that specified by the potentiometer when engaged.

Battery - No speed hold. Engine running in normal Description of connections to terminals C36 and C90

Connection Switch or terminalSwitch position or connection to Function description

C36-1 C46-2 Battery + Voltage supplyC36-2 C47-2 Battery - System earth

C36-3S16-1 1)

Droop/Isochronous

Battery + Isochronous control

Battery - Control of speed droop

C36-4S17-1 1)

Power Control

Battery +Alt 1: Allows temporary use of power/torque curve 2 2)Alt 2: Allows temporary use of power/torque curve 2 2)

Battery - Allows temporary use of power/torque curve 1

S18-1 3) Battery + Drive positionElectrical connections for fixed speed engines

Fine adjustment of speed for fixed speed engines

- The engine speed can be adjusted approximately 100 rpm with potentiometer D8 via the trim input. To obtain a symmetrical speed adjustment, DIP switch 7 must be set to OFF, see page 9.

- The Speed Hold switch must be set to Battery - position in order to carry out speed adjustment via the trim potentiometer.

- Fine adjustment of the speed is disengaged when the Speed Hold switch is set to Battery +, which means the potentiometer cannot affect the speed setting.

- If a trim potentiometer is not connected, the Speed Hold switch must be set to Battery + to disengage the fine speed adjustment.

- If the Speed Hold switch is set to Battery - when there is no trim potentiometer present, the control unit will automatically apply full negative trim, -100 rpm.

- The logic used for smooth increase in engine speed and speed droop is independent of the trim input and therefore does not interact.16 Scania CV AB, Sweden, 2001-01:1 19:01-19

mode.

Program 99

Connection Switch or terminalSwitch position or connection to Function descriptionC36-7

S20-1

Lamp test/Fault code

test switch

Battery +

The control unit first performs a test of all the LEDs and the operators warning lamp for 2 seconds. After which a fault code will be displayed with the control unit LEDs for 5 seconds. The system returns to normal mode for 2 seconds and the procedure will be repeated if the switch is turned on. See Troubleshooting.

Battery - Switch position for normal mode.

C36-8 W14-2Warning lampBattery + via warning lamp

Operators main warning lamp should be placed on the control panel. It is essential the current strength be limited to 500 mA so that it does not affect the function of the interface.

C36-9

S24

Program 991) Optional switch.2) Possibility of using power/torque curve 2 is an option on OEM equipment.3) This switch should be used for normal shut-down of the engine without turning off the battery

voltage.4) Concerning the fine speed adjustment function, see page 16.5) The two reserved inputs must not consume any current but be connected to battery -.6) Get in touch with Scanias suppliers of GAC equipment directly: Huegli Tech AG.

Note: It is essential that all connections to the separate inputs on the control unit (C36-3, C36-4, C36-5, C36-6, C36-7, C36-9, C90-3, C90-4) are connected to either battery + or battery - and not left open to avoid interference that affect the function of the circuit. The connections left "open" will act as aerials for interference, despite them being internally connected to battery -.

C90-1Fuel shut-off

valve EHAB or ELAB

Battery +

If the injection pump is not equipped with fuel shut-off valve, connect to battery + when the engine is to be run. The fuel shut-off valve can also be used as a shut-down device. In this case, a separate switch and relay must be coupled into the circuit. For emergency shut-down only.

C90-2Fuel shut-off valve EHAB

onlyBattery -

If the injection pump is not equipped with fuel shut-off valve, connect to battery + when the engine is to be run. The fuel shut-off valve can also be used as a shut-down device. In this case, a separate switch and relay must be coupled into the circuit. For emergency shut-down only.

C90-3 Reserved 5) Battery - -C90-4 Reserved 5) Battery - -C90-5 - - Signals for load distribution and

synchronisation 6)C90-6 - -C90-7 - - ReservedC90-8 - - Reserved

Connection Switch or terminalSwitch position or connection to Function description18 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99Wiring DiagramsA complete wiring diagram can be found on drawing 1456343.

Summary of connections to terminals C36 and C90

A These three cables must be twisted 40 turns/metreB All-speed engines: Signals for load indication

Fixed-speed engines: For load distribution and synchronisation equipment only19:01-19 Scania CV AB, Sweden, 2001-01:1 19

Program 99Key to component designationsExample:

S16-1S16 Component code in wiring diagram1 Terminal or connection point for the component

= twisted leads

Lead designations in circuit diagramExample:

30DEC.rd-2.5+C46-2means:

30DEC lead markingbn lead colour code1.5 cable area in mm2, 1.0 mm2 if no area specifiedC46 Component to which lead is connected2 Terminal or connection point

Colour codes for electrical wires

Code Colourbk blackbn brownrd redog orangeye yellowgn greenbu bluevt violetgy greywh whitepk pink20 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99List of components for wiring diagram

Comp Description RemarksB25 Switch Idle safety switch

B26 Switch Kick-down, used only on vehicles with automatic gearbox.C36 Connector 12-pinC38 Connector 3-pinC39 Connector 2-pinC40 Connector 2-pinC41 Connector 2-pinC42 Connector 2-pinC43 Connector 2-pinC44 Connector 2-pinC45 Connector 2-pinC46 Connector 1-pinC47 Connector 1-pinC90 Connector 8-pinC92 Connector 2-pinC155 Connector 2-pinC189 Connector 2-pinC190 Connector 3-pinC191 Connector 3-pinD8 Potentiometer Fixed speed engineD35 Potentiometer All speed enginesE6 Control unit DEC2E6 Control unit DEC2F7 Fuse 16 A, battery +24 VF8 Fuse 16 A, battery minusF9 Fuse 5 A, battery +24 VF10 Fuse 5 A, battery minusP1 BatteryR20 Relay Supply 16 AR22 Relay Supply 5 AS16 Switch Droop/IsochronousS17 Switch Power ControlS18 Switch Run/StopS19 Switch Speed hold / No speed holdS20 Switch Lamp test / Fault codeS23 Switch On / Off, power supplyS24 Switch Idle / RunT18 Sensor Engine speed19:01-19 Scania CV AB, Sweden, 2001-01:1 21

Program 99T19 Sensor Coolant temperatureT20 Sensor Charge air temperature

T22 Charge air outlet from engine Boost pressure

T24 Monitor Oil pressureV3 Solenoid valve Fuel shut-offW14 Indicator lamp Diagnostics

Comp Description Remarks22 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99A Main switchB Cable harness to control panelC Load indicator signalD Cable harness to engineE Air hose to the engineF Joint coupling

Note: Dotted leads and components are NOT included with delivery from Scania.Connection to control unit and cables to control panel19:01-19 Scania CV AB, Sweden, 2001-01:1 23

Program 99A Throttle actuation sensor for all-speed engines

B Trim potentiometer and switch for idle/run for fixed-speed engines

C Cable harness to C36 and C90

Note: Dotted leads and components are NOT included with delivery from Scania.Components in control panel24 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99A Junction box, engineB Applies to D9/D12/D14MC Applies to D14AD Applies with EHAB

E Applies with ELABF Not connectedG Cable harness to control unitH Air hose to control unitComponents on the engine19:01-19 Scania CV AB, Sweden, 2001-01:1 25

Program 99Specifications

Control unitVoltage supply: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rated 24 V DC

The control unit is transient and polarity protected by a series diode.

Operating voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The DEC2 unit is designed for operating with a battery voltage of 15 to 32 V DC.

Power consumption: . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A max plus control drive stages8 A continuous, 20 A max.

Polarity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Negative earth, body must be insulated on 2-pin system

Temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +65CRelative humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Up to 95%Surface treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fungus and corrosion resistant

Solenoid switchResistance at 20C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 - 0.8 , Injection pump with ELAB

0.6 - 1.2 , Injection pump with EHAB0.6 - 1.2 , Injection pump withmechanical stop leverMeasured between C39 1 and 2

Control rod sensorResistance at 20C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 -23 ,

measure between: C38 A and B, C38 A and C

Temperature sensorResistance at C for complete sensor. . . . . . . . . . . . . . . 37 334 5 041 -40C

13 329 1 491 -20C5 382 355 0C2 410 195 20C

621 58 60C207 23 100C129 16 120C69 11 150C

Engine speed sensorResistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486-594Inductance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187-253 mH, measured between C41-1 and 2Distance between sensor and flywheel/gear ring. . . . . . 0.5 - 1.5 mm26 Scania CV AB, Sweden, 2001-01:1 19:01-19

Program 99Fuel shut-off valveResistance at 20C . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ELAB: 1-pin, 42 - 48

Measured between C155 -1 and earthEHAB: 2-pin, 35 -50 Measured between C155 -1 and 2

Oil pressure monitorOpening pressure on rise . . . . . . . . . . . . . . . . . . . . . . . .1.1 0.15 barClosing pressure on drop . . . . . . . . . . . . . . . . . . . . . . . .0.7 0.15 bar

Current consumption for separate inputs/outputsCurrent consumption: . . . . . . . . . . . . . . . . . . . . . . . . . . . less than 100 mAApplies to following separate inputs:

Idle safety switch . . . . . . . . . . . . . . . . . . . . . . . (B25Droop/Isochronous. . . . . . . . . . . . . . . . . . . . . . (S16)Power Control . . . . . . . . . . . . . . . . . . . . . . . . . (S17)Run/Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (S18)Speed hold / No speed hold . . . . . . . . . . . . . . . (S19)Lamp test / Fault code . . . . . . . . . . . . . . . . . . . (S90)Idle / Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (S24)

C90-3 and C90-4 (reserved) must not consume any current but be connected to battery -.

Current consumption for throttle actuation signal inputCurrent consumption:Input for accelerator pedal sensor or trim potentiometerless than 20 mA

Speed trimming input (fixed speed): 5 kohm potentiometer 0.5 - 4.0 VDC operating voltage (0 - 5 VDC max)19:01-19 Scania CV AB, Sweden, 2001-01:1 27

19:01-19ContentsImportantBasic principles for electrical connection of the DEC2 system

Scania DEC2 control systemSensorJunction boxCable harness

Sensors and monitors on the DC12Sensors and monitors on the DI12Sensors and monitors on the DI14(locations identical to DC14)

Sensors and monitors on the DI9(locations identical to DC9)

DEC2 control unitLocationBoost pressure hose

Electrical connections on all enginesGeneralCables to terminals C36 and C90:

Electrical connections for all-speed enginesConnecting alternative signal source to the DEC2 throttle actuation signal inputConnecting standard sensor to the DEC2 throttle actuation signal inputDescription of connections to terminals C36 and C90

Electrical connections for fixed speed enginesFine adjustment of speed for fixed speed enginesDescription of connections to terminals C36 and C90

Wiring DiagramsSummary of connections to terminals C36 and C90List of components for wiring diagramConnection to control unit and cables to control panelComponents in control panelComponents on the engine

SpecificationsControl unitSolenoid switchControl rod sensorTemperature sensorEngine speed sensorFuel shut-off valveOil pressure monitorCurrent consumption for separate inputs/outputsCurrent consumption for throttle actuation signal inputSpeed trimming input (fixed speed):