Structure of electrical/electronic system

The electrical equipment on this vehicle makes use of the Small 2 architecture developed specifically to integrate the most sophisticated electronic functions in the most efficient way.

This structure makes up the car's "nervous system", directly controlling all the bodywork functions (access control, visibility, on board information, comfort, etc.) and communicates with the various chassis and power unit subsystems, improving system fault diagnosis, reliability, weight and cost.

A further advantage compared with traditional systems is the simplification of the fitting through the reduction in the number of control units (in line with the functions offered to the customer) and the number of power and signal connections, through the extensive use of serial communication networks (2 CAN dual wire networks, 1 LIN single wire network, 1 A-BUS single wire subnetwork).

Power distribution takes place by means of four fuse boxes and relay boxes, connected to the control elements (static actuators and relays). These control units also act as an interconnection for the wiring and as an electrical distributor to ensure the maximum level of electrical protection and the minimum degree of wiring complexity.

It is a simplified version of the previous "MINI FLORENCE" system: the structure has been simplified to manage a greater number of functions with the Body Computer.

The main electronic components managed by the architecture are listed below:

B-CAN network

C-CAN network

NBC Body Computer node

NGE Electric steering node

NYL Yaw sensor node

NCR Robotised Gearbox Node

NFR Brake node

NCM Engine control node

NQS Instrument panel node

NAB Air Bag node

NSP Parking sensor node

NRR Radio receiver node

RNM Map radio navigator

NCV Bluetooth control unit node

NCL Climate control node

AHM Supplementary heater module

CCP Tyre pressure control Unit

SAA Aftermarket Alarm System

EOBD Diagnosis connector

(the code used in wiring diagrams is shown in brackets)

The structure of the communication lines includes:

A 50 Kbit/s B-CAN type network. Specifications: presence of two network cables, B-CANb and B-CANa, resistant to network malfunctions; 29 bit standard
A 500 Kbit/s C-CAN type network. Specifications: presence of two tangled network cables, C-CANH and C-CANL, not resistant to network malfunctions; 29 bit standard

Replacing and initializing network nodes

Some of the CAN nodes are programmed with default settings which the customer will discover on acquiring the vehicle.

The nodes storing this information are the:

- Body Computer;

- Instrument Panel Node;

- Bluetooth Control Unit Node;

- Radio Navigator Node;

- Climate Control Unit Node;

- Air Bag Node

If the Body Computer is being replaced, an "identical copy" of the Body Computer must be obtained from the Spare Parts Dept. as a V.O.R. order supplying the vehicle chassis number: this copy will contain all the default settings entered into the new vehicle which are stored in the Parts Dept. database for the vehicle chassis number.

If the other nodes described above are being replaced, the Spare Parts Dept. will send a blank component: once fitted, the initial default data must be transferred to it by carrying out the PROXI ALIGNMENT procedure using the Examiner.

Battery disconnection

If the battery is disconnected,

- Body Computer;

- Instrument Panel Node;

- Bluetooth Control Unit Node;

- Radio Navigator Node;

- Climate Control Unit Node;

- Air Bag Node

they keep the information received and do not need to be initialized after the battery is disconnected, whilst the other nodes lose some or all of the information memorized and should be initialized.

Logistic mode

Logistic mode: the software inside the Body Computer cut-out all vehicle electrical loads, except the main functions (vehicle starting, lights). This function makes it possible to save battery energy which is useful when the vehicle is parked, possibly for long periods, in forecourts before being sold.

The function should be disabled in the workshop before the vehicle is handed over to the customer.

Deactivation procedure

The procedure is as follows:

- connect the diagnosis device terminal to the vehicle EOBD socket and turn the ignition ON.

- Check that the "alternator recharging" warning light is in flashing mode to indicate that the Logistic Mode low consumption mode is activated.

- Deactivate the low consumption supply mode by carrying out the fault diagnosis of the Body Computer using the Examiner.

- The Body Computer and all control units involved, on receiving the CAN message, will restore their full operation and send a confirmation message to the Body Computer node.

- Delete the error memory in all control units with a diagnosis function.

- Carry out a key OFF - key ON.

- Check that the "alternator recharging" warning light is on constantly.

Fault diagnosis and diagnosis connector

On this vehicle the 16-way diagnostic socket is not integrated in the Body Computer, but is located to the left of the dashboard, in front of the actual Body Computer:

An A16HS diagnosis connector is needed in order to be able to converse with the various electronic units.

There is also the A-BUS serial line ISO 5 for the alarms, wiping functions, lighting.

CSP rain/dusk sensor control unit

CSA Alarm siren control unit

SAA Aftermarket Alarm System

Body Computer Node

Location of the Body Computer Node.

The rear part of the Body Computer Node is illustrated below.

M001D connector pinout (dashboard wiring)
Pin	Function
1	Immobilizer Aerial (Earth)
2	Immobilizer Aerial (Signal)
3	Negative signal from heated rear windscreen switch (NC)
4	F serial line for ABS / LIN (NC)
5	A-bus line for rain sensor (NC)
6	Right direction indicators negative control from steering column switch unit (NC)
7	Hazard warning lights switch negative control
8	"UP" negative control on driver's window (NC)
9	Sun roof VSO signal generation
10	Hazard warning lights LED control (NC)
11	Door status LED control
12	Heated rear windscreen LED operation (NC)
13	"DOWN" negative control on driver's window (NC)
14	"UP" negative control on passenger's window (NC)
15	"DOWN" negative control on passenger's window (NC)
16	B CAN-A Air Bag node
17	B CAN-A NQS
18	B CAN-A NRR / RNM
19	B CAN-A Bluetooth (NC)
20	B CAN-B Air Bag node
21	B CAN-B NQS
22	B CAN-B NRR / RNM
23	B CAN-B Bluetooth (NC)
24	C CAN-H NCV (Stub) (NC)
25	C CAN-H EOBD (Stub) (NC)
26	C CAN-L NCV (Stub) (NC)
27	C CAN-L EOBD (Stub) (NC)
28	City button negative control
29	Setup
30	Fog lights switch control
31	A/C request signal (NC)
32	Not connected
33	Reference earth to cruise lever signal (NC)
34	Reference earth to steering column switch unit signal
35	Spring cable reference earth signal
36	Main beam/flasher negative control from steering column switch unit
37	LH control panel reference earth
38	Light control negative control
39	Door opening/closing switch signal
40	Boot internal switch signal
41	Cruise Control negative control
42	Horn control steering wheel 1 control (NC)
43	Setup
44	Left direction indicators negative control from steering column switch unit (NC)
45	Rear fog lamps switch control
46	NC
47	NC
48	NC
49	Control panel reference earth
50	LH radio controls on the steering wheel (VOL- ; VOL+ ; Mute ; Voice)
51	Signal controlling direction indicators from steering column switch unit
52	RH radio controls on the steering wheel (SCAN - ; SCAN + ; Source ; TEL)
53	NC
54	Front windscreen wiper first speed negative control from steering column switch unit
55	Front windscreen washer negative control from steering column switch unit
56	DNA selector control power supply (N.C.)
57	Front windscreen wiper intermittent speed negative control from steering column switch unit (NC)
58	NC
59	Rear screen wiper negative control from steering column switch unit
60	Radio lighting according to side lights

M001E connector pinout (dashboard wiring)
Pin	Function
1	INT/A from ignition switch
2	Power supply (+30)
3	Supply for Air Bag
4	Power (+15) for radio
5	Power (+15) for Bluetooth
6	INT/A
7	Power (+15) for NQS
8	Dipped headlamps positive signal for headlamp alignment control at NQS
9	Power earth 1 for NBC
10	Power earth 2 for NBC
11	INT from ignition switch
12	+30 radio power
13	Power (+15) for PND
14	+30 NQS power supply
15	Power (+15) for central control panel light
16	Power (+15) for LH control panel light
17	Power (+15) for steering wheel control lights
18	Glove compartment light (SBMT.) (N.C.)
19	+30 Bluetooth supply
20	+30 radio amplifier enablement (N.C.)

The front part of the Body Computer Node is illustrated below.

a: Fuses

M001A connector (front wiring): Body Computer power supply

M001B connector pinout (front wiring)
Pin	Function
1	Horn relay coil negative control (N.C.)
2	Relay KL15 control (NC)
3	WLM (+15) window winder
4	Fog lights relay negative control
5	Door open negative signal to NCR control unit
6	Heated rear windscreen negative relay feed (N.C.)
7	Puddle light timer
8	Right front direction indicator
9	Right side direction indicator
10	Left front direction indicator
11	Left side direction indicator
12	Lighting depending on side lights
13	Right DRL light (N.C.)
14	Comfort enable control for window winders and mirrors
15	Right front side light (NC)
16	Heated rear windscreen relay feed
17	Door status LED control (NC)
18	Hazard warning lights signal (NC)
19	VSO signal for sun roof (N.C.)
20	Hazard warning lights LED control (NC)
21	Heated rear window LED control
22	Main beam headlamps relay negative control
23	Headlight washer relay negative control
24	LH rear LED light feedback signal (NC)
25	Speedometer sensor earth (N.C.)
26	Front brake pad wear signal
27	Brake light control from brake pedal (NO)
28	Left DRL light (N.C.)
29	Left front side light
30	Right front side light
31	Relay coil negative control (T30) INT/A (NC)
32	"UP" switch signal on driver's window
33	Negative signal from brake fluid level sensor
34	Brake light switch signal
35	TPMS 1 signal (NC)
36	TPMS 2 signal (NC)
37	Outside temperature sensor signal
38	"UP" switch signal on passenger window
39	Front windscreen wiper stop contact signal
40	"DOWN" switch signal on driver's window
41	Heated rear windscreen switch signal
42	B-CAN A Diagnosis socket
43	B-CAN B Diagnosis socket
44	C CAN-H NBC (network start)
45	C CAN-L NBC (network start)
46	Ice LED control (NC)
47	"DOWN" switch signal on passenger window
48	Boot open switch signal (NA) (N.C.)
49	A/C request signal
50	Tachometer sensor signal (NC)
51	Door opening switch from driver's door
52	Outside temperature sensor earth
53	Open passenger door switch signal
54	Open driver's door switch signal
55	Serial line for ABS doors LIN (NC)
56	A-BUS line (N.C.)
57	B CAN-A Climate Control System Control Unit
58	B CAN-B Climate Control System Control Unit
59	C CAN-H diagnostic socket
60	C CAN-L diagnostic socket

M001C connector pinout (front wiring)
Pin	Function
1	Left front electric windows "DOWN" control
2	Two-way pump (rear screen washer)
3	Front windscreen wiper motor (low speed operation)
4	INT power (NC)
5	INT power supply
6	Mirror controls INT power supply
7	INT to NO brake pedal power
8	Engine compartment control unit relay switches INT power supply (NC)
9	INT (NC)
10	Power for left dipped headlamp bulb
11	LH headlamp alignment corrector actuator
12	+30 alarm control unit (NC)
13	Power for rear screen wiper
14	Front windscreen wiper motor (high speed operation)
15	Two-way pump (windscreen washer)
16	Central door locking (closing/opening)
17	Right front electric windows "DOWN" control
18	Front right window winder motor power
19	Front left window winder motor power
20	Puddle lights (SBMT)
21	INT/A for engine compartment control unit
22	INT (NC)
23	INT (NC)
24	INT for climate system assembly
25	INT for brake and clutch pedal
26	Right headlamp alignment corrector actuator
27	Power for right dipped headlamp bulb
28	+30 diagnosis socket
29	Climate control system +30 power supply
30	Tailgate unlocking control
31	Joint door locking/unlocking
32	Central door locking (DEAD-LOCK)

M001F connector pinout (rear wiring)
Pin	Function
1	Rear left direction indicator
2	Left side direction indicator (NC)
3	Right rear direction indicator
4	Fuel level sensor signal
5	Right rear side light
6	Left rear side light (NC)
7	Negative signal from rear wiper cam
8	Right brake light
9	Front courtesy light timed control
10	Rear fog light
11	Rear courtesy light control
12	Puddle light control (NC)
13	Front courtesy light power supply (SBMT)
14	Power supply (INT) for parking sensors, TPRS
15	Number plate lights
16	LH brake light (N.C.)
17	Fuel level negative signal (GND)
18	Right side blinker (NC)
19	Applied handbrake switch negative signal
20	Left rear side light
21	NC
22	Front ceiling light signal (NC)
23	INT for heated seats
24	INT for rain/dusk sensor, sun roof control, bluetooth controls
25	LH rear fog light control (NC)
26	Power supply for Boot Light- Rear Courtesy Light (VAN version) (SBMT)
27	Rear courtesy lights power supply (SBMT)
28	Sun visor light power supply (SBMT)
29	INT/A for Luggage compartment control unit (NC)
30	Lighting enabled by side lights (N.C.)
31	RF aerial (GND) coaxial cable
32	INT/A control for relay
33	F serial line for ABS / doors LIN (NC)
34	B CAN-A Parking sensor and TPMS node
35	Not connected
36	Not connected
37	B CAN-A alarm control unit (NC)
38	Tailgate opening negative control from Soft Touch handle
39	Open tailgate negative signal
40	Rear left door negative signal
41	FIS negative signal (NC)
42	NC
43	NC
44	Right fog light control/reversing light control (NC)
45	Right fog light control/reversing light control (NC)
46	RF aerial signal (coaxial cable)
47	WLM Comfort closing
48	A-BUS line for rain/dusk sensor
49	B CAN-B Parking sensor and TPMS node
50	Not connected
51	Not connected
52	B CAN-B alarm control unit
53	Aftermarket alarm signal
54	Free input (NC)
55	NC
56	Rear right door negative signal
57	NC
58	NC
59	NC
60	Left brake light

The fuses in the Body Computer are illustrated in the diagram below.

A. +30 NBC engine compartment control unit

Position	Identification	Type	Users protected	Capacity
1	F12	A0 (mini)	Right dipped headlamp power supply	7.5 A
2	F32	A0 (mini)	Ceiling and luggage compartment lights	5 A
3	F53	A0 (mini)	NQS	5 A
4	F38	A0 (mini)	Doors and luggage compartment central locking	15 A
5	F36	A0 (mini)	EOBD diagnostic socket, Radio, Bluetooth, alarm siren, vehicle fan, climate control system controls	10 A
6	F43	A0 (mini)	Windscreen/rear screen washer pump	20 A
7	F48	A0 (mini)	Passenger side electric window	20 A
8	F13	A0 (mini)	LH dipped beam, headlight corrector supply	7.5 A
9	F50	A0 (mini)	NAB (Air Bag)	7.5 A
10	F51	A0 (mini)	Climate control system control, radio, Bluetooth, brake lights switch (NC), clutch switch, vehicle fan	5 A
11	F37	A0 (mini)	Brake lights switch (NA), NQS	5 A
12	F49	A0 (mini)	Parking sensors, control lighting, electric mirrors, rain/dusk sensor, sun roof, PND socket, TPMS	5 A
13	F31	A0 (mini)	INT/A for engine compartment control unit	5 A
14	F47	A0 (mini)	Driver's side electric window	20 A

Engine compartment control unit

The engine compartment control unit is located on the left, protected by a special cover.

The cover removing-refitting sequence should be carried out correctly to avoid fitting the cover incorrectly which might allow fluid to enter the control unit

Op. 5505A28 CONTAINER FOR ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.

It is not advisable to use water jets on the engine compartment control unit guard during washing operations.

The engine compartment control unit is incorporated in the engine compartment cable bundle and cannot be replaced on its own.

Fuses and relay switches

The location of the fuses in the engine compartment control unit is illustrated in the diagramme below

Fuse	Capacity	Users protected
F01	70 A	NBC (Body Computer)
F02	50 A	Luggage compartment control unit
F03	20 A	Ignition switch
F04	40 A	NFR 1 (pump)
F05	70 A	NGE
F06	20/30/40 A	Engine cooling electric fan low speed
F07	30 / 40 / 60 A	Engine cooling electric fan high speed
F08	30 A	Climate control electric fan
F09	20 A	Headlight washers
F10	10 A	Horns
F11	10 A	NCM (secondary loads)
F14	15 A	Main-beam headlights
F15	30 A	Heater PTC1
F16	7.5 A	+15 NCM
F17	10 A	NCM
F18	5 A	NCM
F19	7.5 A	Air conditioning compressor
F20	30 A	Rear windscreen demister and defroster
F21	15 A	Fuel pump
F22	15 A	NCM, main loads
F23	20 A	NFR 2 (valves)
F24	5 A	+15 NFR, NGE, yaw sensor
F30	15 A	Fog lights
F81	20 A	LPG ECU
F81	50 A	Heater plug control unit (JTD engine)
F82	50 A	Heater PTC2
F83	30 A	NCR
F84	7.5 A	NCR / methane solenoid valves
F86	15 A	Sockets
F87	5 A	CVM relays +15
F88	7.5 A	Mirrors demisting

Relay	Capacity	Users operated
T02	20 A	Main-beam headlights
T03	20 A	Horns
T05	20 A	Air conditioning compressor
T06	30 A	Engine cooling electric fan low speed
T07	50 A	Engine cooling electric fan high speed
T08	50 A	Climate control fan - Current socket
T09	30 A	Engine management system
T10	20 A	Fuel pump
T14	20 A	Fog lights
T17	20 A	LPG solenoid valves
T17	20 A	Headlight washers
T19	30 A	Heated rear window
T20	20 A	NCR starting inhibition
T20	20 A	Methane solenoid valves
T30	50 A	NCR

LUGGAGE COMPARTMENT CONTROL UNIT

The rear control unit is located in the luggage compartment, on the left rear side panel.

Location of relays and fuses

On the more complete version the luggage compartment control unit protects the electrical system via the following fuses:

WIRING DIAGRAM CODE	Screen-printing on control unit	Protected circuit	Amp.	Type
F55	01	spare		mini
F88	02	spare		mini
F56	03	spare		mini
F57	04	driver's front seat lumbar adjustment motor	10	mini
F80	05	luggage compartment current socket	15	mini
F84	06	spare		mini
F75	07	spare		mini
F68	08	driver's front seat heating	10	mini
F83	09	passenger side front seat heating	10	mini
F64	10	electric window in right rear door	20	mini
F81	11	electric window in left rear door	20	mini
FS8	12	spare		mini
F82	13	TPMS	5 A	mini
F52	14	aftermarket alarm	7,5	mini
F62	15	HIFI amplifier power supply	15	mini
F67	16	subwoofer power supply	10	mini
F50	17	electric sun roof	20	mini

The following relays are housed in the luggage compartment control unit:

WIRING DIAGRAM CODE	Screen-printing on control unit	Protected circuit	Amp.	Type
T30	01	Ignition-operated starting excluded power supply	50	maxi
T31	02	driver's front seat heating	20	micro
T35	03	passenger side front seat heating	20	micro
TS2	04	spare	20	micro

Connections rear view

- B45A 1 pin connector power supply

- B45B connections inserted directly in the rear wiring (the numbers of the pins are stamped on the actual control unit)

The luggage compartment control unit is wired to the rear cable and does not have connections that can be disconnected; it can only be replaced by disconnecting the individual terminals.

Op. 5505A14 SUPPLEMENTARY JUNCTION BOX IN LUGGAGE COMPARTMENT - R.R