WABCO GmbH OPTITIRE Manual Do Utilizador
4
OPTITIRE
Components
22
4.3
Electronic Control Unit (ECU)
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fig. 4-4:
ECU
Mode of function
The ECU immediately recognises all changes from programmed nominal tire pres-
sure values by combined comparison with threshold pressure values and pressure
changes.
Incorrect values of tire pressures are already displayed before departure (if ECU is
permanently powered).
The system may be extended up to 20 wheel modules per ECU.
After system installation, commissioning by PC diagnostic software must be per-
formed.
Any faults occurring during operation are stored in the electronic unit for diagnostic
purposes.
sure values by combined comparison with threshold pressure values and pressure
changes.
Incorrect values of tire pressures are already displayed before departure (if ECU is
permanently powered).
The system may be extended up to 20 wheel modules per ECU.
After system installation, commissioning by PC diagnostic software must be per-
formed.
Any faults occurring during operation are stored in the electronic unit for diagnostic
purposes.
Design
Three standard versions of the electronic control unit (ECU) are employed:
• Towing vehicle and bus: 446 220 100 0
• Trailer: 446 220 110 0
• Trailer Train: 446 220 110 0 ( by parameter adaptation, can be cascaded up to
• Towing vehicle and bus: 446 220 100 0
• Trailer: 446 220 110 0
• Trailer Train: 446 220 110 0 ( by parameter adaptation, can be cascaded up to
5 times wit h20 modules each)
ECUs essentially differ by radio communication signal structure and CAN bus (ID)
connection. External distinguishing mark by type label only.
Further ECU types are tailored to specific customer requests and have other pin
assignments.
All ECUs are suitable for 12 or 24 volt operation and can be mounted on the vehi-
cle frame.
connection. External distinguishing mark by type label only.
Further ECU types are tailored to specific customer requests and have other pin
assignments.
All ECUs are suitable for 12 or 24 volt operation and can be mounted on the vehi-
cle frame.
Software change
ECUs produced after calendar week 43/07 already have new software installed.
The setting range for the reference pressure has been extended downward to be-
tween 3 and 10.5 bar. The software change allows the reference pressure to be set
within certain tolerances on-board. Furthermore, it is also possible to measure the
signal quality of the radio contact to the wheel modules and to display them using
the diagnostic software. The new software allows different reference pressures to
be set per axle.
The setting range for the reference pressure has been extended downward to be-
tween 3 and 10.5 bar. The software change allows the reference pressure to be set
within certain tolerances on-board. Furthermore, it is also possible to measure the
signal quality of the radio contact to the wheel modules and to display them using
the diagnostic software. The new software allows different reference pressures to
be set per axle.