Diagnostic Architecture - Alfa Romeo 159 Training Material

ELECTRICAL
SYSTEM
Tyre pressure ECU (CPP) Opt.
The tyre pressure monitoring ECU is an electronic device with RF receiver capable of receiving the low tyre pressure
signal from a transmitter arranged on the valve. It is located under the dashboard on the right-hand in left-hand drive
models and on the other side in right-hand drive models.
Lateral yaw sensor node (NYL) Opt.
The NYL is an auxiliary node of the NFR used to implement the VDC (Vehicle Dynamic Control) function. It transmits
vehicle trim conditions when cornering to the NFR. It is only present in vehicles with braking system equipped with
VDC. It interfaces with the vehicle via the C-CAN. It is located on the central tunnel between the two front seats.
FPS or FIS
The FPS (Fire Prevention System), also called inertia switch, cuts off the fuel pump and disconnects the positive
battery terminal from the alternator in the event of a collision to prevent fires. It is located under the front left seat near
the tunnel.

9.1.12 Diagnostic architecture

The diagnostic architecture for ECUs (nodes) with and without CAN interface is summarised in the following table.
The nodes requiring proxy alignment if replaced are shown in bold print:
System/node
Volumetric alarms ECU
Steering column stalk unit
Antitheft siren ECU
Rain sensor ECU
Headlight ECU
Airbag ECU
Body Computer node
Computerised info node
Instrument panel node
Radio receiver node
Climate control node
Driver trim node
Passenger trim node
Driver's door node
Passenger door node
Boot node
Parking sensor node
Steering wheel node
Steering lock node
Engine control node
Steering angle node
Robotised transmission node
Braking node
Cruise Control node
Electrical power steering node
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ALFA 159 TRAINING MATERIAL
Diagnostic
Bus
function?
A-BUS
A-BUS
A-BUS
A-BUS
/
/
B-C CAN
B CAN
B CAN
B CAN
B CAN
B CAN
B CAN
B CAN
B CAN
B CAN
B CAN
B CAN
B CAN
C-CAN
C-CAN
C-CAN
C-CAN
C-CAN
C-CAN
253/319
Physical
means
NO /
NO /
NO /
NO /
YES K line
YES B CAN
YES B CAN
YES B CAN
YES B CAN
NO /
YES B CAN
YES B CAN
YES B CAN
YES B CAN
YES B CAN
YES B CAN
YES B CAN
NO /
YES B CAN
YES K line
NO /
YES K line
YES K line
YES K line
YES K line
© 2004 Fiat Auto S.p.A. - Tutti i diritti sono riservati
Fiat Auto S.p.A.
After Sales Training
Proxy?
NO
NO
NO
NO
NO
NO
YES
NO
YES
NO
YES
NO
NO
NO
NO
NO
YES
NO
NO
NO
NO
NO
NO
NO
NO