Operation; Tpms Deactivation - Alfa Romeo 159 Training Material

ELECTRICAL
SYSTEM
TX1
Anteriore
SX
Initiator
D iagnosi
Programmazione
(per tutte le vetture)
Initiator
TX3
Posteriore
SX
Legend:
NQS Instrument panel node
NBC Body Computer node
A-BUS Serial line carrying data from CPP to NBC
B-CAN Serial line carrying data from NBC to NQS
TXn Transmitter sensor inside wheel rim
CPP Tyre pressure ECU
K-LINE Serial line for ECU and system programming and diagnostics.

9.5.3 Operation

The system monitors the pressure of the four tyres fitted and not that of the spare wheel in vehicles equipped with a
space-saver spare. The monitoring system will not work when a spare wheel is fitted until a normal size wheel
equipped with pressure sensor is fitted back.
On the other hand, in vehicles equipped with a normal size spare wheel, the system monitors the pressure of the four
tyres fitted and not that of the spare wheel while this is stowed in the boot. When the spare is fitted, the system will be
cut out for a few minutes to give time for the sensor inside the wheel to be recognised by the system. The conditions
of the four fitted tyres will be monitored by the system.
Similarly, if one or more wheels without sensor are fitted, the system will not be available and the respective message
will appear on the display until the four wheels with sensors are fitted again.
The TPMS cannot indicate sudden loss of tyre pressure (e.g. caused by puncturing). In this case, the car must be
stopped by applying the brakes and steering carefully.
The valves are specific. For this reason, Fiat approved sealants only must be used to repair the tyres: use of other
fluids may prevent normal system operation.
Particular precautions are needed to fit and remove tyres and/or rims. Tyres and/or rims must be replaced by
specialised personnel only to prevent damage and incorrect fitting of the sensors.

9.5.4 TPMS deactivation

The system can be deactivated by Examiner. The unit can be deactivated if the user decides to change the type of
tyres using tyres without a sensor (e.g. snow tyres in the winter). In this case, it is advisable to program the TPMS as
if it were not transmitting rather than having failure messages appear on the NQS. The NQS must consider the TPMS
as deactivated.
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ALFA 159 TRAINING MATERIAL
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Fiat Auto S.p.A.
After Sales Training
TX2
Anteriore
DX
Initiator Initiators
Initiator
TX4
Posteriore
DX
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