Immobiliser fault

[Simon406]

Hello, can anyone help with the following please. The battery on my 2.0HDi 2001 went flat, I removed it, charged it, refitted it, now I have an immobilser fault on the display and the key symbol on the dash. The key plip has also stopped working. The engine turns over but won't fire.There were no faults before the battery went flat. Thankyou.

[lozz]

Hi & welcome to the forum,
as of the problem id say the B.s.i as thrown a fit,
posibly the Battery was disconected before letting the B.s.i go to sleep.

Try reseting the B.s.i there is a Guide and several topics on the forum for this,
look on the knowledge base section of the forum,

As of your key,it will need Re-sync
but iwouidnt worry about that for the moment, they are easy enough to programme,

[grasmere59]

Bad news Simon,mine did exactly the same a month or so back after changing the battery,i had to get a chap out with a laptop with planet peugeot on it and he had to reprogramme the key/immobiliser,cost me £50.As far as i know there is no way round it also you might need the immobiliser code that should be in your handbook wallet on a credit card size card,sorry to be the bearer of bad news,see if theres an auto electrician near you who can do it or it's a tow to the Peugeot main dealer,if you have to do it again keep a 12v battery of some description connected to the battery leads via jump leads or one of those things you put in the fag lighter so you don't lose continuity to the car or i was also told if you take the keys out of the ignition and open the bonnet and leave it at least 15 mins before changing the battery as that gives the car time to "power down".

[lozz]

Procedure for Battery Disconnection (The 3 minute rule)
1. Whenever a vehicle battery has to be disconnected, switch off all equipment interior lights etc. close the doors
leaving the driver's window down.
2. Switch off the ignition and remove the key and DIAG if connected.
3. Wait a full 3-minutes before disconnecting the battery.
The BSI must be allowed to go to sleep i.e into 'Power Save' mode. Do not operate any equipment on the vehicle during
this time. Remember, even opening the bonnet will wake up the BSI on the vehicle fitted with an alarm.
If the battery is under the bonnet open the bonnet first and leave it up. 807 batteries can be disconnected through the
driver's window, remove floor cover first.
Always disconnect the DIAG, as the BSI does not go to sleep when connected. Ensure that a plip from the same Peugeot
model type is not operated within range of your vehicle as this will also wake up the BSI.
Procedure for Battery Reconnection
Unless instructed otherwise by Peugeot or Product Service, you must always carry out the following procedure, often referred
to as a 'Soft Re-boot', to minimise the possibility of the BSI corrupting its own software when reconnecting the
vehicle's battery supply.
Ensure that the procedure for battery disconnection has been adhered to and importantly all BSI functions were switched
off with the driver's window left down.
1. Close all doors on the vehicle.
2. Remove the ignition key if left in the ignition.
3. Reconnect the battery.
4. Wait 10 seconds.
5. Switch on the headlights through the driver's window. You will hear a 'Bong'.
6. Switch on the ignition then start the vehicle and check systems are functioning.
Upon reconnection of the battery: If any vehicle function controlled by the BSI i.e. interior light is switched on,
the internal operation of the BSI has the potential to spike or corrupt its configuration and software program.
Procedure for Jump Starting a Vehicle fitted with BSI
Certain precautions must be observed when jump starting vehicles fitted with a BSI. Failure to do so can result in spiking
ECUs including the BSI and engine management. Remember, when connecting the leads always fit the earth lead
clamp last when completing the jump circuit and disconnect it first on removal.
1. Having connected the jump leads, start the donor vehicle, then start the vehicle with the flat battery.
2. Wait a few minutes for its tick-over to stabilise. Do not rev the engine.
3. Switch on its headlights, heated rear window and heater fan.
4. Remove the jump leads from the vehicles.
5. Switch off all loads one by one.
6. Allow vehicle to idle and recharge battery.
This procedure prevents the alternator, suddenly loaded by the removal of the jump leads, from creating a high voltage
spike before the alternator's regulator can stabilise the voltage

[Gary406]

this sucks. remind me to stay clear of HDi's

[Doggy]

this sucks. remind me to stay clear of HDi's

same is true of petrol D9's

[Busman]

this sucks. remind me to stay clear of HDi's

I think what you mean is to stay clear of modern vehicles. This procedure applies to trucks and buses to. Get a Citroen 2cv, they're nice and simple.

[malcolm]

Exactly what happened to mine. In my case it was corrosion/water in the multi-pin connector under the driver's footwell carpet that caused the battery to drain and caused the immobiliser fault. Worth a check.