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 junction and relay fuse boxes, connected to the control elements (static actuators and relays). These boxes 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

C-CAN

NBC Body Computer node

NGE Electric steering node

NYL Yaw sensor node

NFR Brake node

NCM Engine control node

NCS Suspension Control Node

NCA Twin clutch transmission

NSC Twin clutch transmission selection node

NQS Instrument panel node

NAB Airbag 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

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;

- Airbag 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;

- Airbag 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

The diagnosis socket (EOBD) is external to the Body Computer node and joins the two CAN networks. Therefore, node diagnosis is not performed by means of diagnosis sent on communication networks, except for the two discharge gas headlight control units (CPS and CPD), which are connected to the diagnosis socket directly.

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

Additional lines include the serial ISO 5 A-BUS line for alarm, wiper and lighting functions and a LIN serial line which connects the instrument panel to the rear seat belt fastened indicator display

CSP rain/dusk sensor control unit

NQS Instrument panel node

CAV - Volumetric Alarm Control Unit

CSA Alarm siren control unit

IBS Intelligent Battery Sensor (only Start&Stop versions)

Body Computer node

Location of the Body Computer Node.

Right hand drive version:

The Body Computer Node is placed in the area under the dashboard, on the left, behind the glove compartment.

An anti-break plate A preserves it.

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 stalk (NC)
7	Hazard warning lights switch negative control
8	"UP" negative control on driver's window (NC)
9	VSO signal generation (NC)
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 Airbag node
17	B CAN-A NQS
18	B CAN-A NRR / RNM
19	B CAN-A Bluetooth
20	B CAN-B Airbag node
21	B CAN-B NQS
22	B CAN-B NRR / RNM
23	B CAN-B Bluetooth
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 (NC)
29	Setup
30	Front fog light switch signal (NC)
31	A/C request signal (NC)
32	Not connected
33	Earth reference signal (NC)
34	Reference earth to steering column switch unit signal
35	Spring cable reference earth signal
36	Main beam headlight/flasher negative control from steering column stalk
37	LH control panel reference earth
38	Light control negative control
39	Door opening/closing switch signal
40	Luggage compartment internal switch signal (NC)
41	Cruise Control negative control
42	Voltage stabiliser diagnosis
43	S&S deactivation button
44	Left direction indicators negative control from steering column stalk (NC)
45	FN/RN control from control panel
46	Not connected
47	Not connected
48	Not connected
49	Control panel reference earth
50	LH radio controls on the steering wheel (VOL-; VOL+; Mute; Voice)
51	Side light control signal from steering column stalk
52	RH radio controls on the steering wheel (SCAN -; SCAN +; Source; TEL)
53	Not connected
54	Windscreen wiper first speed negative control from steering column stalk
55	Windscreen washer negative control from steering column stalk
56	DNA selector control power
57	Windscreen wiper intermittent speed negative control from steering column stalk (NC)
58	Not connected
59	Rear window wiper negative control from steering column stalk
60	Radio lighting according to side lights

M001E connector pinout (dashboard wiring)
Pin	Function
1	INT/A from ignition switch
2	Power (+30) (NC)
3	Supply for airbag
4	Power supply (+15) for radio (setup)
5	Power supply (+15) for Bluetooth and voltage stabilizer (Start&Stop)
6	INT/A (NC)
7	Power (+15) for NQS
8	Dipped headlight positive signal for headlight alignment control at NQS
9	Power earth 1 for NBC
10	Power earth 2 for NBC (NC)
11	INT from ignition switch
12	Power supply +30 for radio and voltage stabilizer (Start&Stop)
13	Power supply (+15) for PND and AUX socket
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.)
19	+30 Bluetooth supply
20	+30 radio amplifier enable

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	"N" command from DNA selector
2	Start&Stop starting relay control
3	WLM (+15) window winder
4	Fog lights relay negative control
5	Door open negative signal to NCA control unit (TCT)
6	Heated rear window relay negative control
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
14	Comfort enable control for window winders and mirrors
15	Right front side light (NC)
16	INT/A relay control (NC)
17	Door status LED control (NC)
18	Hazard warning lights signal (NC)
19	VSO signal for sunroof
20	Hazard warning lights LED control (NC)
21	Heated rear windscreen LED control
22	Main beam headlight relay negative control
23	Headlight washer relay negative control
24	LH rear LED light feedback signal
25	DNA selector earth
26	Front and rear brake pad wear signal
27	Brake light control from brake pedal (NO)
28	Left DRL light
29	Front left side light
30	Front right side light
31	"D" command from DNA selector
32	"UP" switch signal on driver's window (NC)
33	Negative signal from brake oil level sensor
34	Brake light switch signal (N.C.)
35	TPMS 1 signal (NC)
36	TPMS 2 signal (NC)
37	Outside temperature signal
38	"UP" switch signal on passenger's window (NC)
39	Windscreen wiper stop contact signal
40	"DOWN" switch signal on driver's window (NC)
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	Cornering light control (NC)
47	"DOWN" switch signal on passenger's window (NC)
48	Open bonnet switch signal
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
57	B CAN-A Climate Control System Control Unit
58	B CAN-B Climate Control System Control Unit
59	C CAN-H
60	C CAN-L

M001C connector pin-out (front wiring)
Pin	Function
1	Front left electric windows "DOWN" control (NC)
2	Two-way pump (rear window washer)
3	Windscreen wiper motor (low speed operation)
4	INT power (NC)
5	Power socket INT power supply
6	INT seat heater control power
7	INT to NO brake pedal power
8	Engine compartment control unit relay switch INT power, reverse switch
9	INT (NC)
10	Power supply for left dipped headlight bulb
11	LH headlight alignment corrector actuator
12	+30 TPMS control unit, volumetric sensors, alarm siren
13	Supply for rear window wiper
14	Windscreen wiper motor (high speed operation)
15	Two-way pump (windscreen washer)
16	Central door locking (closing/opening)
17	Front right electric windows "DOWN" control (NC)
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 for DNA selector lighting
23	INT for gas discharge headlights
24	INT for climate system assembly
25	INT for brake and clutch pedal
26	Right headlight alignment corrector actuator
27	Power supply for right dipped headlight bulb
28	+30 diagnosis socket
29	+30 power for mirror control, climate control
30	Tailgate unlocking control
31	Joint door locking/unlocking
32	Central door locking (DEAD-LOCK)

M001F connector pin-out (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 roof light timed control
10	Left brake light
11	Rear roof light control (NC)
12	Puddle light control (NC)
13	Front roof light power supply (SBMT)
14	Parking sensor power supply
15	Number plate lights
16	LH stop light (N.C.)
17	Fuel level negative signal (GND)
18	Right side flasher (NC)
19	Applied handbrake switch negative signal
20	Left rear side light
21	Not connected
22	LH light diagnosis (NC)
23	INT for TPMS control unit, suspension control
24	INT for rain/dusk sensor, electrochromic mirror, sunroof control, Bluetooth controls, volumetric sensors
25	Brake light control (NC)
26	Luggage Compartment Light Power Supply (SBMT)
27	Passenger sun visor light power supply (SBMT)
28	Driver sun visor light power supply (SBMT)
29	INT/A for luggage compartment control unit
30	Lighting connected to position lights
31	RF aerial (GND) coaxial cable
32	INT/A relay control (NC)
33	F serial line for ABS / doors LIN (NC)
34	B CAN-A Parking sensor node
35	Not connected
36	Not connected
37	B-CAN-A TPMS control unit
38	Tailgate opening negative control from Soft Touch handle
39	Open tailgate negative signal
40	LH rear door negative signal (NC)
41	FIS negative signal (NC)
42	Not connected
43	Not connected
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 (NC)
48	A-BUS line for rain/dusk sensor, volumetric sensors
49	B CAN-B Parking sensor node
50	Not connected
51	Not connected
52	B-CAN-B TPMS control unit
53	After market anti-theft signal (NC)
54	RH rear LED light feedback signal
55	Not connected
56	RH rear door negative signal (NC)
57	Not connected
58	Not connected
59	Not connected
60	Rear fog light

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

right hand drive version:

A. +30 NBC engine compartment control unit

FUSE IDENTIFICATION

Position	Identification	Type	Users protected	Capacity
1	F12	A0 (mini)	Right dipped headlight power supply	7.5 A (15 A gas discharge)
2	F32	A0 (mini)	Roof lights and luggage compartment lights, sun visor lights, storage compartment light	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 diagnosis socket, radio, Bluetooth, radio navigator, alarm siren, volumetric sensors, car fan, TPMS, mirror controls, climate controls	10 A
6	F43	A0 (mini)	Windscreen/rear window washer pump	20 A
7	F48	A0 (mini)	Passenger side electric window	20 A
8	F13	A0 (mini)	LH dipped headlight, headlight alignment corrector power supply	7.5 A (15 A gas discharge)
9	F50	A0 (mini)	NAB (airbag)	7.5 A
10	F51	A0 (mini)	Climate control, radio setup, Bluetooth, brake light switch (NC), clutch switch, reverse switch, engine compartment control unit relay, flow meter (JTD), water in filter sensor (JTD)	5 A
11	F37	A0 (mini)	Brake light switch (NO), NQS, headlight corrector	5 A
12	F49	A0 (mini)	Parking sensors, control lighting, electrochromic mirror, rain/dusk sensor, sun roof, PND socket, TPMS, cigar lighter lighting, seat belt display	5 A
13	F31	A0 (mini)	INT/A for engine compartment junction unit relay	5 A
14	F47	A0 (mini)	Driver side electric window	20 A

FUSE IDENTIFICATION (SINCE MODEL YEAR 2013)

Position	Identification	Type	Users protected	Capacity
1	F12	A0 (mini)	N.C.	-
2	F32	A0 (mini)	N.C.	-
3	F53	A0 (mini)	NQS	5 A
4	F38	A0 (mini)	Doors and luggage compartment central locking	15 A
5	F36	A0 (mini)	EOBD diagnosis socket, radio, Bluetooth, radio navigator, alarm siren, volumetric sensors, car fan, TPMS, mirror controls, climate controls	15 A
6	F43	A0 (mini)	Windscreen/rear window washer pump	20 A
7	F48	A0 (mini)	Passenger side electric window	20 A
8	F13	A0 (mini)	Headlight alignment corrector	5 A
9	F50	A0 (mini)	NAB (airbag)	7.5 A
10	F51	A0 (mini)	Climate control, radio setup, Bluetooth, brake light switch (NC), clutch switch, reverse switch, engine compartment control unit relay, flow meter (JTD), water in filter sensor (JTD)	5 A
11	F37	A0 (mini)	Brake light switch (NO), NQS, headlight corrector	5 A
12	F49	A0 (mini)	Parking sensors, control lighting, electrochromic mirror, rain/dusk sensor, sun roof, PND socket, TPMS, cigar lighter lighting, seat belt display	5 A
13	F31	A0 (mini)	INT/A for engine compartment junction unit relay	5 A
14	F47	A0 (mini)	Driver side electric window	20 A

Engine compartment fuse box

The engine compartment junction 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 junction unit guard during washing operations.

The engine compartment junction unit is incorporated in the engine compartment wiring harness 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 diagram below

Fuse	Capacity	Users protected
F01	70 A	NBC (Body Computer)
F02	40 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	30/40/50 A	Engine cooling electric fan high speed
F08	40 A	Climate control fan (MY 2013)
F08	15 A	Heated windscreen
F09	5 A	Heated blow-by
F09	20 A	Headlight washer
F10	15 A	Horns
F11	10 A	NCM (secondary loads)
F14	15 A	Main beam headlights
F15	10 A	Suspension control unit
	7.5 A	LPG sensors
	15 A	NCA (TCT)
	30 A	Heater PTC1 (JTD)
F16	5 A	+15 NCM, NCA (TCT)
F17	7.5/10/15 A	NCM
F18	5 A	NCM, NCA (TCT)
F19	7.5 A	Air conditioning compressor
F20	30 A	Rear windscreen demister and defroster
F21	15 A	Fuel pump
F22	15/20 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	Hi-Fi amplifier and subwoofer (TCT transmission)
	60 A	PTC2 heater (0.9 TwinAir)
	60 A	Glow plug preheating control unit (JTD)
F82	40 A	TCT pump
	40 A	PTC1 heater (0.9 TwinAir)
	50 A	Heater PTC2 (JTD)
F83	40 A	Climate control system fan
F84	15 A	(TCT) transmission pump
	15 A	LPG control unit
	20 A	Hi-Fi amplifier and subwoofer (CM)
F85	15 A	Power sockets
F87	7.5 A	+15 mirror defroster and heated nozzles

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	30 A	Climate control fan (MY 2013)
T08	20 A	Heated windscreen
T09	30 A	Engine management system
T10	30 A	S&S starting inhibitor (with T20 locked)
	30 A	LPG sensors
	20 A	Headlight washer (version without S&S)
T14	20 A	Fog lights
T17	20 A	Fuel pump
T19	30 A	Heated rear window
T20	30 A	LPG control unit
	30 A	TCT control unit
	30 A	S&S starting
T30	50 A	Climate control system fan
T31	20 A	Power sockets

Relay switches and fuses outside of the engine compartment junction unit

Some fuses and relay switches for some engine versions and trim levels are located in front of the engine compartment junction unit.

1 - Battery charge status sensor fuse (versions with Start&Stop)

1 - LPG control unit fuse (Euro 6 LPG version)

2 - Headlight washer relay switch (versions with Start&Stop)

2 - LPG power supply relay switch (Euro 4 LPG version)

3 - Heated blow-by relay switch (JTD versions, optional for cold countries)

ADDITIONAL FUSE BOX

A number of fuses are arranged in the luggage compartment on the rear left side panel.

The following fuses are housed in the luggage compartment fuse box:

in the diagram	in the wiring diagrams	Users protected	Capacity
F1	F63	Sun roof	20 A
F2	F64	Not used	-
F3	F65	Rear power socket	15 A
F4	F60	HIFI amplifier (up to 08)	15 A
F5	F61	HIFI subwoofer (up to 08)	10 A
F6	F62	Heated seats	15 A

The following relay switches are housed in the luggage compartment control unit:

in the diagram	in the wiring diagrams	Users protected	Capacity
R1	T42	Rear power socket	20 A
R2	T43	Not used	-
R3	T40	Left heated seat	20 A
R4	T41	Right heated seat	20 A

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

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