Citroen C4 boot wont open

Check all relevant fuses
2008, 2009, 2010, 2011, 2012
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Dashboard Fuse box 1
Instrument panel fuse box #1 diagram: Citroen C4 Picasso I (2008, 2009, 2010, 2011, 2012)

Assignment of the fuses in the Dashboard Fuse box 1 (2008-2012)
N° Rating Functions
F1 15 A Rear screen wipe
F2 30 A Locking and unlocking earth
F3 5 A Airbags and pretensioners
F4 10 A Multimedia, photochromatic rear view mirror, particle filter, diagnostic socket, air conditioning, manual headlamp height adjustment
F5 30 A Front windows, front door electronic control panel, panoramic sunroof
F6 30 A Rear windows
F7 5 A Interior lamps, cooled glove box, radio
F8 20 A Multifunction screen, radio, steering mounted controls, multimedia, deflation detection, alarm, trailer
F9 30 A Multimedia, front 12 V sockets, torch, radio
F10 15 A Height corrector (suspension)
F11 15 A Brake switch, ignition switch
F12 15 A Parking sensors, automatic screen wipe and lighting, passenger’s electric seat, lane departure warning system, Hi-Fi amplifier, trailer
F13 5 A Engine relay unit (BSM), driver's electric seat
F14 15 A Air conditioning, Bluetooth® hands-free kit, automatic gearbox lever, airbags, instrument panel
F15 30 A Locking and unlocking
F16 - SHUNT
F17 40 A Heated rear screen
Dashboard Fuse box 2
Instrument panel fuse box #2 diagram: Citroen C4 Picasso I (2008, 2009, 2010, 2011, 2012)

Assignment of the fuses in the Dashboard Fuse box 2 (2008-2012)
N° Rating Functions
F29 20 A Heated seats
F30 - Not used
F31 40 A Trailer relay unit
F32 15 A Rear 12 V socket
F33 5 A Parking sensors, automatic rain sensitive wipers and automatic illumination of headlamps, passenger's electric seat, lane departure warning system, Hi-Fi amplifier
F34 5 A Trailer
F35 - Not used
F36 20 A Hi-Fi amplifier
F37 10 A Air conditioning, lighting pack
F38 30 A Driver's electric seat
F39 5 A Fuel filler flap
F40 30 A Passenger's electric seat, panoramic sunroof
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Engine compartment
Citroen C4 Picasso I (2008, 2009, 2010, 2011, 2012)

Assignment of the fuses in the Engine compartment (2008-2012)
N° Rating Functions
F1 20 A Engine management
F2 15 A Horn
F3 10 A Screenwash pump
F4 20 A Headlamp wash pump
F5 15 A Engine components
F6 10 A Xenon dual-function directional headlamps, automatic headlamp height adjustment, clutch switch, protection switch box (BCP)
F7 10 A Automatic gearbox, engine coolant level switch, power steering
F8 25 A Starter motor
F9 10 A Stoplamp switch
F10 30 A Engine components
F11 40 A Rear blower
F12 30 A Wipers
F13 40 A Built-in Systems Interface (BSI)
F14 30 A Air pump, heat recovery and exchange
F15 10 A Right-hand main beam
F16 10 A Left-hand main beam
F17 15 A Left-hand dipped beam
F18 15 A Right-hand dipped beam
F19 15 A Engine components
F20 10 A Engine components
F21 5 A Cooling fan relay
Fuses on the battery
Fuses on the battery: Citroen C4 Picasso I (2008, 2009, 2010, 2011, 2012)

Fuses F1 to F6 are located on the small board, clipped vertically on the battery fusebox.

Assignment of the fuses on the battery (2008-2012)
N° Rating Functions
F1 5 A Automatic gearbox actuator
F2 5 A Stop switch
F3 5 A Battery charge estimation ECU
F4 20 A ESP supply
F5 5 A ESP supply
F6 20 A ECU for 6-speed electronic gearbox/automatic gearbox

May be faulty lock / actuator