W32.33>2044>79
Shown: wheel configuration 6x2 with a single>tired trailing axle
A1 Instrument cluster (ICUC) control unit
A1 p1 Multifunction display
A2 Central gateway control unit (CGW) A26 Level control (CLCS) control unit
CAN 2 Interior CAN CAN 3 Frame CAN LIN 7 Button group LIN
S110 Left multifunction steering wheel button group
A43 Modular switch panel (MSF) control unit
B19 Front axle pressure sensor B20 Left driven axle pressure sensor B21 Right driven axle pressure sensor CAN 1 Exterior>CAN
General information
The axle load measuring system for full air suspension measures the current axle load over pressure sensors in the air spring bellows on the front and drive axle .
Using the axle load measuring device the load on every axle can be called up individually and the total weight of the vehicle called up in the multifunction display (A1 p1) of the IC (ICUC) control unit (A1). The vehicle must be at driving level to do this. For 3>axle vehicles with a front axle or trailing axle no
measurement for the additional axle is planned. The axle load of the additional axle is determined through computation using the measurements obtained on the measured axles.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Requirements
f Circuit 15 ON f Vehicle at rest
f Vehicle is at driving level (normal level 1 or normal level 2) f Lift axle is lowered
f Function starting>off aid is switched off
f Function traction aid is switched off (for a leading axle)
Function sequence
The front axle pressure sensor (B19), the LH drive axle pressure sensor (B20) and the RH drive axle pressure sensor (B21) permanently report to the level control (CLCS) control unit (A26) about the current pressure values in the air spring bellows. The level control (CLCS) control unit (A26) calculates the current loading of the front axle, the drive axle as well as the total vehicle based on the signals of the pressure sensor using parameterized characteristics.
If the level control (CLCS) control unit (A26) has determined all values it transmits them to the IC (ICUC) control unit (A1) via the central gateway control unit (CGW) (A2).
Through pressing on the steering wheel button for the LH MFL button group (S110) the level control menu can be called up in the multifunction display (A1 p1) of the IC. The axle loads can be called up there over the menu item "Axles" .
i Indication of the axle loads is always associated with a certain degree of imprecision and can therefore be manually
recalibrated. To do this the axle load must be determined using a weighing machine and entered over the IC (ICUC) control unit (A1) with the aid of the LH MFL button group (S110).
Instrument cluster control unit (ICUC), component description
A1
Page 331
Component description for central gateway control unit (CGW)
A2
Page 333
Component description for level control (CLCS) control unit
A26
Page 358
Component description for modular switch panel control unit (MSF)
A43
Page 370
Component description for level control pressure sensor
B20, B21
Page 409
Component description for multifunction steering wheel
GF32.33>W>3000H
Monitoring/controlling the specified level, function
2.8.11
MODEL 963
W32.33>2042>79
Shown: wheel configuration 6x2 with a single>tired trailing axle
A2 Central gateway control unit (CGW) A10b Electronic Brake Control (EBS)
control unit (Wabco) A10c Electronic Brake Control (EBS)
control unit (Knorr)
Y20 Front axle level control valve unit Y21a Level control valve unit,
3>axle vehicles A26 Level control (CLCS) control unit
B24 Left driven axle position sensor B25 Right driven axle position sensor B27 Front axle position sensor CAN 1 Exterior>CAN
Prerequisites
f Vehicle in motion
Function sequence
The LH drive axle position sensor (B24) and the RH drive axle position sensor (B25), as well the front axle position sensor (B27) for full air suspension permanently send the distance between the frame and axle on the level control (CLCS) control unit (A26). The level control (CLCS) control unit (A26) evaluates the signals from the LH drive axle position sensor (B24), the RH drive axle position sensor (B25) as well as the front axle position sensor (B27) for full air suspension and initiates an independent control procedure as soon as there is any deviation from the specified level.
In order to provide protection before a control procedure for cornering the level control (CLCS) control unit (A26) queries the central gateway control unit (CGW) (A2) via the exterior CAN (CAN 1) and the frame CAN (CAN 3) information from the Electronic Brake Control (EBS) control unit (A10b or A10c) about the difference in speed of the front wheels.
If there is no cornering the level control (CLCS) control unit (A26) actuates the level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) at the drive axle as well as the front axle level control valve unit (Y20) for full air suspension according to the deviations in the specified level. The respective air spring bellows are aerated or ventilated until the LH drive axle position sensor (B24), the RH drive axle position sensor (B25) as well the front axle position sensor (B27) for full air suspension report reaching of the specified level.
Actuation of the valve units takes place for standstill of the vehicle immediately and in driving mode with a delay of 60 s.
A control procedure which was initiated at standstill of the vehicle will be completed of the vehicle begins to move.
Every individually initiated control procedure will be interrupted by actuating the service brake.
Component description for central gateway control unit (CGW)
A2
Page 333
Component description for Electronic Brake Control control unit (EBS)
A10b, A10c
Page 341
Component description for level control (CLCS) control unit
A26
Page 358
Component description for position sensor B24, B25, B27
Page 410
Component description for front axle level control valve unit
Y20
Page 483
Component description for level control for 2>axle vehicles valve unit
Y21
Page 485
Component description for level control for 3>axle vehicles valve unit
GF32.33>W>3001H
Changeover from level 1 to level 2, function
2.8.11
MODEL 963
W32.33>2043>79
Shown: wheel configuration 6x2 with a single>tired trailing axle
A1 Instrument cluster (ICUC) control unit
A1 h14 Level control indicator lamp A1 p1 Multifunction display A2 Central gateway control unit
(CGW)
A26 Level control (CLCS) control unit
CAN 3 Frame CAN S918 Driving level switch S921 Driving level/Stop button Y20 Front axle level control valve unit Y21a Level control valve unit for
3>axle vehicles A43 Modular switch panel (MSF) control
unit
A44 Instrument panel switch module 1 B24 Left driven axle position sensor B25 Right driven axle position sensor B27 Front axle position sensor CAN 1 Exterior>CAN
CAN 2 Interior CAN
i Triggering factors for switchover to "level 2" can be poor road surfaces. The switchover to "level 2" prevents the frame from hitting the emergency rubbers on the axle for rocking of vehicle to settle the suspension. The vehicle speed is not important for the switchover.
Requirements
f Circuit 15 ON
f Driving level button (S918) activated f Vehicle stationary or while driving
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Function sequence
The preselected driving level (for an activated driving level button (S918) driving level 2) is activated by pressing the button driving level/stop (S921).
In the multifunction display (A1 p1) of the IC (ICUC) control unit (A1) the message "Towing vehicle outside driving level" is indicated as well as the level control indicator lamp (A1 h14) of the IC (ICUC) control unit (A1) being actuated.
The level control (CLCS) control unit (A26) receives the signal from the button on the modular switch panel (MSF) (A43) and via the central gateway control unit (CGW) (A2) and actuates level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) at the drive axle as well as the front axle level control valve unit (Y20) for full air suspension . All air spring bellows are aerated.
The LH drive axle position sensor (B24) and the RH drive axle position sensor (B25), as well as the front axle position sensor (B27) for full air suspension permanently send the distance between the frame and axle on the level control (CLCS) control unit (A26) during the filling process.
As soon as the level control (CLCS) control unit (A26) recognizes reaching of Level 2 from the signals from the LH drive axle position sensor (B24), the RH drive axle position sensor (B25) as well as the front axle position sensor (B27) for full air suspension is appropriately actuates the level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) as well as the front axle level control valve unit (Y20) for full air suspension. The air spring bellows are no longer aerated. The level control (CLCS) control unit (A26) now monitors specified level 2 with the aid of the travel sensors.
Component description for instrument cluster control unit (ICUC)
A1
Page 331
Component description for central gateway control unit (CGW)
A2
Page 333
Component description for level control (CLCS) control unit
A26
Page 358
Component description for modular switch panel control unit (MSF)
A43
Page 370
Component description for position sensor B24, B25, B27
Page 410
Component description for front axle level control valve unit
Y20
Page 483
Component description for level control for 2>axle vehicles valve unit
Y21
Page 485
Component description for level control for 3>axle vehicles valve unit
GF32.33>W>3002H
Raise/lower vehicle frame manually, function
2.8.11
MODEL 963
W32.33>2041>79
Shown: wheel configuration 6x2 with a single>tired trailing axle
1 Function display 2 Axle pre/mode selection 3 Activation of raise/lower 4 'Stop' button
5 Memory button M1 6 Memory button M2
A1 Instrument cluster (ICUC) control unit
A1 h14 Level control indicator lamp
CAN 2 Interior CAN CAN 3 Frame CAN LIN 8 Level control LIN
S22 Level control operating unit Y20 Front axle level control valve unit Y21a Level control valve unit for
3>axle vehicles A1 p1 Multifunction display
A2 Central gateway control unit (CGW) A26 Level control (CLCS) control unit A43 Modular switch panel (MSF) control
unit
B24 Left driven axle position sensor B25 Right driven axle position sensor B27 Front axle position sensor CAN 1 Exterior>CAN
Requirements
f Circuit 15 ON
f Vehicle speed <30 km/h
Function sequence for vehicle frame raise or lower over level control operating unit (S22)
Activate level control operating unit (S22) by pressing any button. The level control operating unit (S22) shows the readiness to operate by illuminating the function indicator (1).
Select the function raise/lower front axle, raise/lower the overall vehicle, raise/lower rear axle by pressing the axle pre/mode selection buttons (2).
The function lift or lower is activated by pressing the activation of raise/lower buttons (3).
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
The level control (CLCS) control unit (A26) receives the signals from the level control operating unit (S22) connected to the modular switch panel (MSF) (A43) via the central gateway control unit (CGW) (A2) and actuates the level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) on the drive axle as well as the front axle level control valve unit (Y20) for full air suspension.
The level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) and the front axle level control valve unit (Y20) aerate or purge the air spring bellows on the drive axle or front axle depending on the selected function. The chassis frame is raised or lowered.
In the multifunction display (A1 p1) of the (ICUC) IC the message "Towing vehicle outside driving level" is indicated as well as the level control indicator lamp (A1 h14) of the IC (ICUC) control unit (A1) being actuated.
i The functions messages for level control are not displayed if the driver is in the menu for level control.
The LH drive axle position sensor (B24), the LH drive axle position sensor (B25) or the front axle position sensor (B27) send the change in frame height to the level control (CLCS) control unit (A26).
As soon as the level control (CLCS) control unit (A26) recognizes the signals from the LH drive axle position sensor (B24), the RH drive axle position sensor (B25) or the front axle position sensor (B27) that the upper or lower frame height limit has been reached then it independently interrupts raising or lowering of the vehicle frame.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
The vehicle frame therefore remains in the uppermost or lowest maximum position. If the desired vehicle frame height is reached raising or lowering of the vehicle by actuation of the stop button (4) ends.
The level control (CLCS) control unit (A26) receives the stop signal from the level control operating unit (S22) connected to the modular switch panel (MSF) (A43) via the central gateway control unit (CGW) (A2) and actuates the level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) on the drive axle as well as the front axle level control valve unit (Y20) for full air suspension according to the stop signal. The air spring bellows are no longer aerated or ventilated.
The existing frame height of the vehicle is taken by the level control (CLCS) control unit (A26) as the new specified level with a delay of 4 s.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Function sequence for return to driving level
The vehicle frame is standing at any height.
Select the function driving level over the axle pre/mode selection (2) buttons.
The function is activated by pressing the activation of
raising/lowering buttons (3) and the level control operating unit (S22) is deactivated. The function indicator (1) for the level control operating unit (S22) goes out.
The level control (CLCS) control unit (A26) initiates aeration or purging of the air spring bellows, dependent on the position of the vehicle frame, over the level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) as well as the front axle level control valve unit (Y20) for full air suspension.
The LH drive axle position sensor (B24), the LH drive axle position sensor (B25) or the front axle position sensor (B27) send the change in frame height to the level control (CLCS) control unit (A26).
As soon as the level control (CLCS) control unit (A26) recognizes reaching of the driving level (normal level) from the signals from the LH drive axle position sensor (B24), the RH drive axle position sensor (B25) as well as the front axle position sensor (B27) for full air suspension appropriately actuates the level control for 2>axle vehicles valve unit (Y21) or the level control for 3>axle vehicles valve unit (Y21a) as well as the front axle level control valve unit (Y20) for full air suspension. The air spring bellows are no longer aerated or ventilated.
The message "Towing vehicle outside driving level" in the multifunction display (A1 p1) of the IC (ICUC) control unit (A1) as well as the level control indicator lamp (A1 h14) of the IC (ICUC) control unit (A1) go out.
Component description for instrument cluster control unit (ICUC)
A1
Page 331
Component description for central gateway control unit (CGW)
A2
Page 333
Component description for level control (CLCS) control unit
A26
Page 358
Component description for modular switch panel control unit (MSF)
A43
Page 370
Component description for position sensor B24, B25, B27
Page 410
Component description for level control operating unit
S22
Page 461
Component description for front axle level control valve unit
Y20
Page 483
Component description for level control for 2>axle vehicles valve unit
Y21
Page 485
Component description for level control for 3>axle vehicles valve unit
GF32.33>W>3003H
Store frame height, function
2.8.11
MODEL 963
W32.33>2041>79
Shown: wheel configuration 6x2 with a single>tired trailing axle
1 Function display 2 Axle pre/mode selection 3 Activation of raise/lower 4 'Stop' button
5 Memory button M1 6 Memory button M2
A1 Instrument cluster (ICUC) control unit
A1 h14 Level control indicator lamp
CAN 1 Exterior>CAN CAN 2 Interior CAN CAN 3 Frame CAN LIN 8 Level control LIN
S22 Level control operating unit Y20 Front axle level control valve unit Y21a Level control valve unit for
3>axle vehicles A1 p1 Multifunction display
A2 Central gateway control unit (CGW)
A26 Level control (CLCS) control unit A43 Modular switch panel (MSF)
control unit
B24 Left driven axle position sensor B25 Right driven axle position sensor B27 Front axle position sensor
Requirements
f Vehicle at rest
f Level control operating unit (S22) is activated
f Function raise/lower overall vehicle is selected or lights up
Function sequence
The function lift or lower is activated by pressing the activation of raise/lower buttons (3).
The level control (CLCS) control unit (A26) receives the signals from the level control operating unit (S22) connected to the modular switch panel (MSF) (A43) via the central gateway control unit (CGW) (A2) and actuates the level control for 2>axle vehicles