C3 1.4 HDI car unlocking

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My Name: Nelisiwe

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Joined: Sat Jan 26, 2013 12:24 pm

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I have a 2004 Citroen C3 HDI model. Yesterday afternoon I parked & locked it. Later @ night when I tried open the door, I did not respond. I tried opening with a spare key but it still did no open. I've replaced battery on one key but this didn't help. I've also tried opening the doors manually with both key with no luck. Somebody please help.
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My Name: Arfur Dent

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Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Hi Nelisiwe


Do you have the original Citroen Radio equipment fitted (CD)?
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My Name: C3CAR

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Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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I've also tried opening the doors manually with both key with no luck
If the door won't unlock by manually turning the key in the lock, you are trying to unlock the wrong car.
My Name: Nelisiwe

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Posts: 2
Joined: Sat Jan 26, 2013 12:24 pm

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Arfur Dent wrote:Hi Nelisiwe


Do you have the original Citroen Radio equipment fitted (CD)?
It's an original factory fitted radio that i bought the car with.
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My Name: Arfur Dent

Guru
Posts: 3441
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 320 times
Been thanked: 121 times

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Nelisiwe wrote:It's an original factory fitted radio that i bought the car with.
Oh, there goes my theory. Fitting an aftermarket stereo often causes the same symptoms due to the wiring mix-up.

The reason is that the BSI (the computer which controls the central locking) enter a deep sleep state when there is too much drain on the battery, usually overnight. This helps preserve battery charge for starting the engine, but at a sacrifice of the remote central locking.

If you can get the car unlocked manually, using the key in the 'ignition' and starting the engine usually restores remote operation for the rest of the day, but shuts down again overnight.

You may have something similar?


It may also be worth re-synchronising the keys to the car. There are instructions below
https://citroenc3owners.com/citroen-c3-t ... 3-t71.html


Keeping the key off the key chain while diagnosing these sorts of problems is important.

Check you can unlock the drivers door manually, start the engine (to silence the alarm), stop the engine and see if the remote locking/unlocking works again. This will help identify if its the BSI sleeping or something else.
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