Vehicle level control - Scania Group

Vehicle level control
Function
426

381

Switch for manual vehicle level adjustment, positioned on the instrument panel.

426

382

Switch for manual vehicle level adjustment, positioned on the operation unit.

FunctionVehicles with air suspension as part of their specification can be raised and lowered by adjusting the amount of air in the air bellows. Vehicle level control can e.g. be used for load management, when operating a truck-mounted crane or if greater ground clearance is needed.

Vehicle level control can be performed manually with switches on the instrument panel or with the operation unit positioned next to the driver’s seat. Depending on the vehicle specification, these functions are factory set. More information can be found under the heading Ordering information.

More information on manual control can be found in the Driver’s Manual.

Where conditions change, such as a change in load conditions, the air suspension sys-tem ensures the vehicle level remains unchanged. To achieve this, the air suspension system automatically adjusts the amount of air in the air bellows.

There is an exception when the emptying air bellows function is active. More infor-mation can be found under the heading Emptying the air bellows.

More information on automatic control can be found in the Driver’s Manual.

This document describes how the vehicle level is controlled remotely and activated with other functions on the vehicle. For example, when tipping, activating power take-offs or activating a switch on the chassis.

The Remote vehicle level control function is located in BICT (Bodywork Interface Configuration Tool) and is controlled by the BCI control unit (Bodywork Communi-cation Interface).

Note:The Remote vehicle level control function is only available on vehicles fitted with BCI functionality.

Scania Truck Bodybuilder 22:10-621 Issue 4 2020-06-04© Scania CV AB 2020, Sweden 1 (18)

Function


BICT functions for remote vehicle level controlThere are a number of functions to control level adjustment in BICT:

• Alternative vehicle level– Activate alternative vehicle level– Activate emptying of air bellows– Activate stored vehicle level 1-4

• Prevent vehicle level control– Inhibit automatic vehicle level control– Inhibit manual vehicle level control

• Normal vehicle level– Activate return to normal vehicle level

• Abort current levelling activity


Function


the factoryAlternative Variant code

level adjustment Trucks only 4029ATruck and trailer 4029B

Chassis conditions

Note:A new operation unit has been introduced from August 2018 onwards. The operation units are not interchangeable between vehicles produced before and after the appli-cable date.

Vehicle manufacturing period Preparations fromProduction site Chassis serial number Option

30/08/2018 - Operation unit forSödertälje 2 153 027 -

31/08/2018 -Zwolle 5 522 420 -

04/09/2018 -Angers 9 243 875 -

31/10/2018 -São Bernardo do Campo 3 943 437 -


Function


Function behaviourThe Remote vehicle level control function is adjusted using parameter settings in SDP3 for Bodybuilders (Scania Diagnos and Programmer 3).

Information on adjustable parameters is found in the document Parameters – Body-work adaptation.

Alternative vehicle levelThe function for activating alternative vehicle level is available in BICT. The func-tion adjusts the vehicle level to a pre-defined value. Define an alternative vehicle lev-el using the parameter setting in SDP3 for Bodybuilders.

Emptying air bellowsThe function for activating emptying of air bellows is available in BICT. The func-tion is used to give the vehicle better stability when e.g. driving a truck-mounted crane or dumping loads.

The function empties the air bellows until the chassis reaches the air suspension’s bump stop. The air suspension system also stops correcting the vehicle level if there is a change in e.g. load conditions.

Scania recommends residual pressure of 20 kPa be maintained in the air bellows. Without residual pressure, there is a risk the air bellows will become misshapen and cease to function. Activate residual pressure using the parameter setting in SDP3 for Bodybuilders.

It is also possible to empty the air bellows manually. More information can be found in the Driver’s Manual.


Function


Stored vehicle level On vehicles fitted with options for stored vehicle levels, it is possible to store up to 4 vehicle levels on vehicles fitted with switches for memorised levels, M1-M4.

The functions for activating stored vehicle levels are available in BICT. To store a vehicle level, use the M1-M4 switches that are located on the instrument panel and on the operation unit for level adjustment, see illustrations.

More information on options for stored vehicle levels can be found under the heading Ordering options.

Do as follows to define and activate a stored vehicle level:

1. Set the desired vehicle level using manual adjustment.2. Hold down the switch to which the vehicle level is to be stored for 5 seconds.

Note:Stored vehicle levels can only be defined using the switches M1-M4. They cannot be defined using BICT or parameter settings in SDP3.

Prevent level adjustmentThe functions to prevent level adjustment are available in BICT. These functions are used to prevent automatic level control and to prevent manual level adjustment.


Function


Normal vehicle levelThe function to activate return to normal vehicle level is available in BICT. Normal vehicle level can be set using SDP3 for Bodybuilders. Factory settings depend on the vehicle’s specification.

The EXT button must be active when the vehicle is going to be controlled remotely from outside the cab in order to return to normal vehicle level.

Cancelling ongoing level adjustment activityThis function is used to cancel ongoing level adjustment. When ongoing level adjust-ment is cancelled, the raising or lowering movement stops. The vehicle level remains unchanged until a request for new level adjustment is activated.


Ordering options


ant code DescriptionA -C Includes switch on the instrument panel for alternative vehicle level.D Includes switch on the instrument panel for emptying the air bellows.E Includes switches on the instrument panel for alternative vehicle level and for

2 memorised levels.F Includes switches on the instrument panel for emptying the air bellows and for

2 memorised levels.A Operation unit in cab for level adjustment of truck.B Operation unit in cab for level adjustment of truck and trailer.B If required.EFA If requiredDC

Ordering options

Vehicles with BCI functionality are prepared for connection of an external CAN net-work (Controller Area Network) for bodywork.

Option Alternative VariBCI functionality With 5837Alternative vehicle levels Alternative vehicle level 2488

Empty air bellows 2488Alternative vehicle level and memory levels

2488

Empty air bellows and memorised lev-els

2488

Operation unit for level adjustment Trucks only 4029Truck and trailer 4029

Cable harness from cab to frame 7-pin 24117+7-pin 24117+7+7-pin 2411

Extension cable harness on frame 2 m 30238 m 302312 m 3023


Ordering options


All alternatives for the Alternative vehicle level (variant family 2488) option contain the following functions in BICT:

• Alternative vehicle level• Emptying air bellows• Stored vehicle level. This function can only be used if the vehicle is equipped with

switches for memorised levels.

The various alternatives for the option specify which switches should be present on the instrument panel as standard from the factory and the functions they are intended to control.

Information on cable harnesses from the cab to the frame and extension cable har-nesses on the frame can be found in the document “Cable harnesses for bodywork functions”.


Activation


ActivationOne or more activation signals can be used to activate Remote vehicle level control. Activation signals can be initiated via CAN or BICT programming. When using CAN, the activation signal is a CAN message. When using BICT Programming, the activation signal is either +24 V, earth or another optional signal from the BICT menu.

Activation signals are divided into 2 categories:

• Signals that come from a function available on the vehicle from the factory.• Signals that come from a function that has been retrofitted by a bodybuilder.

Signals from a factory-fitted functionMany functions which are fitted at the factory transmit a signal to indicate an active or inactive state. These signals can be used as an activation signal.

Signals from a retrofitted functionTo use a signal from a retrofitted function as an activation signal, it must be connect-ed to harness-to-harness connector C259 in the bodywork console. From connector C259, the signal travels onwards to the BCI control unit. An example of a retrofitted function is a sensor on the bodywork.


Activation


Activation with logic diagram in BICT1. Create a logic diagram in BICT that defines which signals will trigger the activa-

tion:– Select finished vehicle functions in BICT, e.g. a factory-fitted power take-off

or parking brake, for signals from functions which are fitted at the factory.– Select that the signal is coming from harness-to-harness connector C259 when

the signal is coming from a retrofitted function.2. Define activation conditions in BICT and using parameter settings in SDP3 for

Bodybuilders.3. Define vehicle level remote control behaviour using parameter settings in SDP3

for Bodybuilders.4. Transfer the logic diagram together with the parameter settings to the vehicle’s

BCI control unit using SDP3 for bodybuilders.

More information on BICT can be found in the document “BCI, Bodywork Commu-nication Interface”.


Activation


Example of a logic diagram in BICTThe example below shows 2 logic diagrams. The upper one shows how Remote ve-hicle level control can be activated. The lower one shows how a second function can be activated when the air bellows are completely emptied. Remote vehicle level con-trol is activated when a signal comes from a function that is fitted to the vehicle at the factory (Vehicle function) and from a retrofitted function via harness-to-harness connector C259.


Activation


sllowing options are available for selecting activation factors:nals from functions that are fitted to the vehicle at the factory (Vehicle function).nals from retrofitted functions, e.g. a switch to extend the supporting legs, via C259. Settingsa:Signal input in C259, positions 1-10High signal (+24 V) or low signal (ground)

ny future conversion or troubleshooting.

tion conditions and behaviour are defined using SDP3 for Bodybuilders.ample, acknowledgement signal when the air bellows are emptied.via C259. Settingsb:nal output in C259, positions 11-16 (+24 V) or positions 17-21 (earth)h signal (+24 V) or low signal (ground)

nversion or troubleshooting.

&2

4

Activate emptying of the bellows

Enter signal source here, high ( ) or low ( )C259-X

414 1

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Activation with CANFor the vehicle to be able to receive CAN signals via an external CAN network, this must be activated with a parameter setting in SDP3 for Bodybuilders.

Pos. Description Option1 Signals from functions that affect the activation of Remote vehicle lev-

el control.The fo• Sig• Sig

––

a. In the grey box, specify where the signal comes from, for example, a specific switch. This facilitates a

2 Function to be activated, e.g. emptying of the air bellows. Activa3 Acknowledgement signal For ex4 Function to be activated, e.g. extending the supporting legs. Signal

• Sig• Hig

b. In the grey box, specify where the signal goes: for example, the function. This facilitates any future co

Vehicle function

Bellows emptied

3

Enter signal source here, high ( ) or low ( )C259-X

1


Activation


A CAN message defines when and how the function is to be activated.

More information can be found in the following document:

• General information on CAN• CAN interface for bodywork• External CAN Communication Specification


Activation


Activation conditionsManual level adjustment can only be performed if the maximum vehicle speed is 30 km/h.

Functions for controlling level adjustment via BICT can only be activated if the max-imum vehicle speed is 10 km/h.

Functions for level adjustment can be activated when the starter lock is in drive mode. For level adjustment when the starter lock is in the locked position, the air sus-pension system control unit must be set to standby mode.

Standby modeTo use level adjustment when the starter lock is in the lock position, the control unit for the air suspension system must be set to standby mode. To do this, press one of the switches for level adjustment on the instrument panel or on the operation unit for 5 seconds after the starter lock has been put in the locked position. A display message on the instrument cluster, ICL, will confirm that standby mode is active and the func-tions for level adjustment are still active.

Stand-by mode is deactivated in one of the following ways:

• Automatic deactivation after a given time, defined with SDP3 for bodybuilders.• Manual deactivation by holding down the stop button on the operation unit for 2

seconds.


Deactivating the functions


Activation conditions with or without EXT switchWith EXT switchEXT switch must be activated after the starter key is set to drive mode. After that, the function can be activated.

Without EXT switchActivation of the function is not dependent on the EXT switch.

Deactivating the functionsManual deactivationDeactivation occurs through a new request for level adjustment.

Automatic deactivationAt speeds over 30 km/h, the manual level adjustment option is deactivated .

At speeds over 10 km/h, the empty air bellows function is deactivated and the vehicle level automatically returns to normal vehicle level.

The functions are also deactivated when the conditions for activation are not met in accordance with the logic diagram in BICT or parameter setting in SDP3.


Connection


ConnectionActivation signal that is initiated with the logic dia-gram in BICTThis example describes a connection in the cab from a retrofitted function.

Information on connections in the chassis frame can be found in the document “Ca-ble harnesses for bodywork functions”.

The activation signal should be either +24 V or earth.

Proceed as follows:

1. Connect the activation cable to positions 1-10 in harness-to-harness connector C259.

2. Assign functions to the selected positions by creating a logic diagram in BICT. More information can be found in the section Activation.

3. Transfer the logic diagram from BICT to the vehicle’s BCI control unit using SDP3 for Bodybuilders.

The function is ready for activation.


More information on harness-to-harness connector C259 can be found in the docu-ment “Harness-to-harness connector C259 – BCI-controlled functions”.


Connection


1

5

4C259

BCI

23

C259

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66

Activation by +24 V or earthing.

Part information and connection positionsIn this example, a switch is used to generate an activation signal.

The parts are available from Scania dealers.

More information on connections to harness-to-harness connector C259 can be found in the document “Harness-to-harness connector C259 – BCI-controlled func-tions”.

Pos. Designation Description1 Bodywork central electric

unit, P915 voltagea with 5 A fuse or earth bus, G70

a. Supply voltage that is activated when the starter lock is in drive position.

The fuse is fitted by the bodybuilder.2 Switch Connect the switch from +24 V or earth to an input

in harness-to-harness connector C259.3 Cable The minimum permitted cable cross section is

0.75 mm².Fitted by the bodybuilder.

4 C259 Located in the bodywork console.Connect the cables to the contact housing.

5 BCI control unit -


Connection


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Harness-to-harness connector C493 in the bodywork console.

Example of connection via external CAN networkVehicles with BCI functionality are prepared for connection of an external CAN net-work. Connect the external CAN network with an external control unit to harness-to-harness connector C493 in the bodywork console.

More information about connecting to C493 can be found in the document “Harness-to-harness connector C493 – BCI-controlled bodywork functions”.


More information can be found in the following document:

• General information on CAN• CAN interface for bodywork


Documents

Vehicle level control - Scania Group