Citroen C5 both key fobs stopped opening and locking doors at same time

Car: Citroen C5
Variant: 2002 LX hatch diesel
Model Year: 2002
Categories: Electrics, ECU, Warnings & Lights
Yesterday, both of my key fobs stopped working, I locked the car with my one (4 yrs old with good battery), we went to shop and 15 mins later came back and neither my fob nor my wife's fob would open the car doors. The central lock button on the dash works and opens and closes the doors as normal. I have replaced the battery in mine, and I have tried re-pairing by holding lock button and turning on ignition for 30 seconds, but don't get any confirmation bleep. Still both do not work.
Posted: Sep 12, 2021 (3 years ago)
There are 2 types of fuse boxes in that year , check the numerous fuse related to c/locking

Fuse box diagram Citroen C5 2001-2008
Fuse box in passenger compartment.

fuse box location.





fuse box diagram (pre 2004 type 1).





Assignment of the fuses.

F1

(10A) Rear fog lamp, seat adjustment relay – driver's side, seat adjustment relay – passenger's side, sunroof motor

F2

(15A) Rear screen wiper motor

F3



F4

(15A) Door function control module – driver's side, door function control module – passenger's side

F5

(15A) LH stop lamp, stop lamp (high level)

F6



F7

(20A) Overhead console, interior lamp – rear, glove box lamp, AC/heater function control panel, cigarette lighter, accessories connector-front

F8



F9

(30A) Door function control module – driver's side, door function control module – passenger's side, sunroof motor

F10

(15A) Fuel additive injector, trailer socket, accessories connector- front, accessories connector- rear, suspension adjustment

F11

(15A) Engine control module (ECM) (RLZ), transmission control module (TCM), transmission gear position switch, steering column function control module, audio unit, navigation system control module, AC/heater function control panel, digital multifunction display, alarm system horn

F12

(10A) Transmission mode sensor, RH front side lamp, RH tail lamp, licence plate lamps, cigarette lighter, audio unit

F13



F14

(30A) Door function control module – driver's side, door function control module – passenger's side, central locking – front, fuel filler flap motor

F15

(30A) Central locking – rear, electric windows – rear

F16

(5A) Fuse box (engine bay 1), fuel additive control module, steering column function control module, SRS control module

F17

(10A) RH stop lamp

F18

(10A) Cruise control, automatic transmission (AT), data link connector (DLC), steering column function control module

F20

(10A) Audio unit, navigation system control module

F21



F22

(10A) LH front side lamp, LH tail lamp

F23

(15A) Suspension adjustment

F24

(15A) Instrument panel, digital multifunction display, AC/heater function control panel, parking aid control module

F25



F26

Heated rear windscreen

G36 (30A) Audio amplifier
G37 (30A) Electric driver's seat
G38 (30A) Electric front passenger's seat
G39 (30A) Heated driver's seat
G40 (30A) Heated front passenger's seat
Posted Sep 12, 2021 (3 years ago)
Thank you very much whittingehame !
I have checked both F14 and F15 and tested them, and fuses are fine.
Not sure what else it might be, any suggestions would be appreciated.
Posted Sep 13, 2021 (3 years ago)
Check F9 and F4 also
Posted Sep 13, 2021 (3 years ago)
F4 and F9 are both fine also.
Posted Sep 14, 2021 (3 years ago)
My wife's key fob suddenly started working this morning.
I bought some more new batteries, and replaced both just now in both fobs, and cleaned contacts inside with isopropyl , but my fob still does not work, tried to pair again, but no luck.

Something must have gone wrong with my fob circuit board so will get a new fob, at least the receiver part in the car does work.

Thank you for your help @whittingehame
Posted Sep 15, 2021 (3 years ago)
That's good you have one at least one operating , thank you for updating the forum
Posted Sep 15, 2021 (3 years ago)

This problem is archived

If you're having a similar problem please click below to re-post this problem, you can then customise it to suit your situation.

Join the community
Got a question? Can you answer other questions here? If so please...
More problems with the 2002 model year Citroen C5

We have 48 problems and solutions in our database for this model year of the car.

View all Citroen C5 Problems