Fuses and relays Renault Laguna 3 (X91; 2007-2016)

Renault Laguna 3 generations (X91: BT, KT, DT) was produced in 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 and 2016. A station wagon version called Estate appeared on the market at the same time as the hatchback.

We provide information with a description of all electronic control units, fuses and relays of Laguna 3, block diagrams and the purpose of their elements. We will pay special attention to the fuses responsible for the cigarette lighter and sockets.

General arrangement

Location of all electrical equipment.

No. Component
1 ABS control module
2 Air conditioning control module - behind the glove box
3 A / C / Heater Blower Motor Control Module
4 Accumulator battery
5 CAN data bus, gateway control unit
6 Diagnostic connector (DLC)
7 Driver's door control module
8 Passenger door electrical control module
9 Electric parking brake control module - under the bottom
10 Engine control module
11 Coolant preheater control module
12 Four Wheel Steering Control Module - Under Bottom
13 Fuse box, engine compartment 1
14 Fuse box, engine compartment 2
15 Fuse box, engine compartment 3 - fuses in the under-hood fuse box - supply circuits: Alternator, under-hood fuse / relay box 1, under-hood fuse / relay box 2, instrument panel fuse / relay box 1, multifunction box control 2, power steering pump, starter.
16 Fuse box, passenger compartment 1
17 Fuse box, passenger compartment 2 - with auxiliary heater
18 Xenon headlight control mounting block
19 Glow plug relay
20 Sound signal (horn)
22 Multifunctional control unit 1- functions: central locking, alarm, rear window defroster, horn, immobilizer, direction indicators, interior lamps, keyless entry and start, fog lights, wiper / washer rear window, steering column lock, brake lights, rear door opener drive, windshield washer
23 Multifunctional control unit 2- integrated with fuse / relay box 1 in the engine compartment - functions: Air conditioning, cooling fan motor, engine oil level sensor, fog lights, fuel pump, headlights, headlight washers, reversing lights, front marker lamps, rear marker lamps , windshield wipers
24 Navigation control module
25 Parking Control Module - Behind Right Rear Trim Panel
26 Power steering control module
27 Seat adjustment control module
28 Seat heating control module 1- under the seat
29 Seat heating control module 2- under the seat
30 Seat Heater Module - Under Seat
31 SRS electronic unit
32 Electronic gearbox unit

In the passenger compartment

Fuse box located at the bottom left of the dashboard.  

Asmp / Description
R1 Time delay fuse supply relay F39, F40, F41, F42, F43, F44, F49, F50, F51, F52
R2 Heated rear window relay
R3 Horn relay
R4 Empty
R5 Empty
R6 Empty
R7 Empty
R8 Empty
R9 Time delay fuse supply relay F45, F46, F47, F48, F53, F54, F55, F56, F57, F58
R10 Empty
F1 Empty
F2 Empty
F3 Empty
F4 Empty
F5 (5A) Interior lamps
F6 (5A) Interior rearview mirror
F7 Empty
F8 Empty
F9 Empty
F10 Empty
F11 Empty
F12 (40A) Heated rear window
F13 Empty
F14 Empty
F15 Empty
F16 Empty
F17 Empty
F18 (20A) UCH
F19 (20A) UCH
F20 (10A) UCH
F21 (15A) Burglar alarm ECU, display
F22 (15A) UCH
F23 (30A) Passenger door control module
F24 (30A) Driver's door control module
F25 (25A) Heated seats
F26 (15A) UCH
F27 Empty
F28 (30A) Moonroof
F29 (25A) Parking brake
F30 (20A) Trailer electrical connector
F31 (10A) UCH
F32 Empty
F33 (25A) Audio system
F34 Empty
F35 Empty
F36 (20A) Audio system, display
F37 (10A) Instrument panel
F38 Empty
F39 Empty
F40 (5A) Brake light switch, ABS and ESP control units
F41 Empty
F42 (25A) Power seats
F44 (15A) Luggage compartment bodywork power connector
F45 Empty
F46 Empty
F47 Empty
F48 (10A) Second row accessory power connector
F49 (5A) ECU for air conditioning
F50 (30A) Power windows
F51 (5A) Interior lighting lamps
F52 (5A) Audio system, central locking, emergency alarm
F53 Empty
F54 (10A) Cigarette lighter fuse
F55 (5A) Interior temperature sensor blower
F56 (15A) Heated windscreen washer jet, left
F57 Empty
F58 (40A) ECU for the air conditioner

In the luggage compartment

The block is located on the battery side, it consists of high-power fuse-links.

Description Amps
F1 starter  
F2 Battery disconnect unit 250
F3 Passenger compartment fuse and relay box 60

In the engine compartment

There are three mounting blocks in the engine compartment on the right side.

Fuse box #1

General view.

No. Decoding Amps
D1 Spare diode -
D2 Spare diode -
D3 Cooling fan diode 49
D4 Spare diode -
FM1 Fuse for cooling fan, protection and switching unit 60
FM2 Spare -
FM3 Spare -
FM4 Spare -
FM5 Preheating unit 70
FM6 Coolant Heater Interface Block 70
FM7 70
FM8 Fuse for injection computer, fuel heater relay, fan relay when connected in series and in parallel 20
FM9 Spare -
FM10 Spare -
FM11 Spare -
FM12 Spare -
FM13 Spare -
FH1 Passenger compartment fuse box 80
FH2 Passenger compartment fuse box - protection and switching unit 80
FH4 Passenger compartment fuse box 80
FH5 Air conditioning ECU 60
FH6 ECU of the system of all steered wheels 60
FH7 Air conditioning ECU 30
FH8 Spare -

Fuse box #2

General view.

No. Decoding Amps
F1 Right headlight fuse, headlight range control 10
F2 Fuse for left headlight, switch glass, rear door lift 10
F3 Headlight washers 15
F4 Fog lights 20
F5 Left headlight 10
F6 Right headlight 10
F7 Diagnostic connector, fuse and relay box in the passenger compartment, gear indicator 15
F8 ABS / ESP system 30
F9 Windshield wiper 30
F10 Airbag / seatbelt ECU, steering column switches 10
F11 Empty -
F12 Electronic gearbox control unit 7.5
F13 Empty -
F14 Rear and front oxygen sensor, diesel sensor 15
F15 Fuse for transmission ECU 20
F16 Brake light switch, fuel heating relay 5
F17 Reverse light relay, manual transmission position sensor 10
F18 UCH 15
F19 Starter 25
F20 Empty -
F21 Empty -
F22 Air conditioning 10
F23 Fuel injection ECU 5
F24 Left headlights 15
F25 Right headlight 15

Power fuse panel

Located on the battery.

No. Description Amps
F1 Empty -
F2 Empty -
F3 Fuse for the supply circuit "+" of the battery through the fuse for the fuse and relay box in the passenger compartment, the protection and switching unit 80
F4 Fuse for generator, engine compartment fuse and relay box 300
F5 Empty -
F6 Fuse for the supply circuit "+" of the battery through the fuse to the injectors> the fuel pump through the protection and switching unit, the injection computer, the water pump for cooling the bearings 35
F7 Protection and switching unit fuse 5
Related fuse diagrams
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