It is currently Fri Oct 24, 2014 7:58 am


Xsara immobilizer problems

Our most popular forum is for Citroën problems, discussions and chat.
Specialising in AX, BX, ZX, Xantia,C5, Xsara, Saxo and XM. CX, 2cv & Berlingo, all are welcome.NOT for selling cars/parts!

Moderators: BernieLugg, AndersDK

  • Author
  • Message
Offline

whiz_bit

  • Posts: 7
  • Joined: Sat Jan 02, 2010 1:10 am

Xsara immobilizer problems

PostSat Jan 02, 2010 1:31 am

I have a 98 reg Citroën xsara 1.8 16v which has done 160k miles. I am now getting a problem with the immobilizer, a couple of days ago when I was starting the car a got a beep and the key light flashed on the dash, taking the key out and putting it back appeared the resolve the problem. Now it has happened again and taking the key out and putting it back will not clear the fault. I have tried unhooking the battery and reconnecting it but that had no effect.

This exact problem happened about 3 weeks ago and the car was stranded at work for 3 days and then started working again.

It is just a chipped key there is no remote central locking, I an confident the key is transmitting because if I hold it up to the ignition with the door open I get the warning beeps for the key being in the ignition.

Any suggestions on where I go from here will be greatly appreciated.

Wayne
Offline

wheeler

  • Posts: 2957
  • Joined: Sat Sep 21, 2002 7:07 pm
  • Location: United Kingdom

PostSat Jan 02, 2010 10:01 am

I take it you dont have a spare key to try ?
Im not 100% on this but i believe any chipped key even if its not yours will trigger the key left in warning so may still be a key fault, if you know another xsara or xantia 2 owner you could try their key & see if it still triggers the warning.
First thing i would try is to remove & clean the gearbox & body earth connections. Other things that can cause this problem are the double injection relay & the inertia (fuel cut off) switch so they could be worth a look.
Offline

whiz_bit

  • Posts: 7
  • Joined: Sat Jan 02, 2010 1:10 am

PostSat Jan 02, 2010 10:16 am

Hi,

Thanks for the reply I will do the earth connections first as I will probably need a bit more guidance on the other two.

I did take a quick look at the earth terminal on the battery and traced back the engine earth terminal after this happened the first time, any ideas where the body earth points are?
Offline
User avatar

DickieG

Monaco's youngest playboy

  • Posts: 5007
  • Joined: Sat Nov 25, 2006 10:15 am
  • Location: Buckinghamshire

PostSat Jan 02, 2010 11:00 am

wheeler wrote:I take it you dont have a spare key to try ?
Im not 100% on this but i believe any chipped key even if its not yours will trigger the key left in warning so may still be a key fault, if you know another xsara or xantia 2 owner you could try their key & see if it still triggers the warning.

I've just tested this using the key from my HDi in the V6 ignition and the alarm only went off when the correct (V6) key was used.
08 C Fünf 2.2 HDi Exclusive Tourer
07 Mercedes SL55 F1
06 C3 Desire 1.4
05 BMW 330i Convertible
72 DS 21 EFi Pallas BVH
Offline

whiz_bit

  • Posts: 7
  • Joined: Sat Jan 02, 2010 1:10 am

PostSat Jan 02, 2010 11:24 am

Thanks Dickieg I can worrying about the key, I am going to take a walk to the car shortly.

I will post back what progress I make.
Offline
User avatar

myglaren

Forum Admin Team

  • Posts: 9443
  • Joined: Sun Mar 02, 2008 2:30 pm
  • Location: Washington

PostSat Jan 02, 2010 11:28 am

A guy I work with has a Xsara Picasso, had only one key and something cleared the RFID on the key so his immobiliser prevented him starting the car.

He had to go to the dealer and get a new one, that they had to take to his car with a Lexia and reset the alarm/immobiliser system and code in the new key(s).

Cost him £160. Took them a week to get the new key from France.
________________________________
2003 C5 2.0HDi 110 SX 197,300+
Steve

Jackie Evancho...Megastar!
Offline

whiz_bit

  • Posts: 7
  • Joined: Sat Jan 02, 2010 1:10 am

PostSun Jan 03, 2010 3:32 pm

Yesterday I walked over to where the car was with my tools and the bloody thing started, so at least I was able to get it home. I have cleaned both battery terminals and checked the earth point on the gearbox btoh seamed perfectly fine. I have only visually checked the body earth point but it looked fine to me.

Since then it has had the immobilizer problem again yesterday afternoon but worked when it was tried and today the engine died on me when I was waiting in traffic, so there is still something not right. Thinking about it about a week before I had the immobilizer problem for the first time the engine post power whilst I was driving at around 40 for a couple of seconds and ignition fault light came on whilst that happened. So I am wondering if it could be the double injection relay as suggested by wheeler. Can anyone advise where I find the relay and how I check it.

Thanks
Offline
User avatar

Paul-R

  • Posts: 878
  • Joined: Thu May 07, 2009 4:24 pm
  • Location: Wirral, NW England; Vaucluse 84, France

PostSun Jan 03, 2010 9:47 pm

I'm not convinced it's an immobiliser problem as such as the immobiliser circuit is switched off once the engine is rumnning for safety reasons. This would mean that the cutting out is either a different problem or the same one causing problems with the immobiliser at start up.
2003 2.0 HDi 100 C5 Exclusive Estate
2001 2.0 HDi 90 Xsara Estate
_________________
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.
Offline

wheeler

  • Posts: 2957
  • Joined: Sat Sep 21, 2002 7:07 pm
  • Location: United Kingdom

PostMon Jan 04, 2010 5:35 pm

totaly agree with paul-r here, the imobiliser wil not cause cutting out, only a non start issue. sounds to me like the injection ECU is losing a feed or earth which would also cause the imob light to come on as the ECU & CPH loose comunication with each other just the same as the red & green light senario on the old keypad systems.
Offline

avin44

  • Posts: 28
  • Joined: Fri Dec 26, 2008 4:27 pm
  • Location: Lossiemouth near Elgin, Morayshire

xsara immobiliser problems

PostWed Jan 06, 2010 3:57 pm

I am sure I read in a hand book that this problem with the light flashing on the dashboard means the battery in the fob needs changing.
up, up and away
Offline

whiz_bit

  • Posts: 7
  • Joined: Sat Jan 02, 2010 1:10 am

PostThu Jan 07, 2010 12:46 pm

I am right back to the car not starting with the immobilzer light flashing again, started the car fine this morning left it running for 10 minutes to warm up whilst I scraped the ice off of it, turned it off for 2 minutes whilst I used my keys to lock the door and now it won't start.

Got the AA out to take a look but the guy was prett clueless and the car is still broken down.

Can any explain how I go about checking the feed to the injection ECU?
Offline

wheeler

  • Posts: 2957
  • Joined: Sat Sep 21, 2002 7:07 pm
  • Location: United Kingdom

PostThu Jan 07, 2010 7:40 pm

You will first need a wiring diagram for the injection system & a multimeter. You will need to use the diagram to find out what pins on the ECU have the power & earth wires One of the main causes of loss of feed to the ECU is the double injection relay which from memory should be bolted to the back of the ECU casing.
Offline

whiz_bit

  • Posts: 7
  • Joined: Sat Jan 02, 2010 1:10 am

PostSat Jan 09, 2010 3:04 pm

I had my mechanic guy out today he has checked the battery all the earths from the battery, the power and earth feeds to the dual injection relay and bench tested the relay. Tested all the supply and earths to and from the ecu and still is not working. Does anyone have any other ideas?
Offline

wheeler

  • Posts: 2957
  • Joined: Sat Sep 21, 2002 7:07 pm
  • Location: United Kingdom

PostSun Jan 10, 2010 8:35 am

I take it he was there quite a while checking all this ?
I dont think the keys have lost their code as the fault wouldnt be intermittant.
It seems like the aerial & key are seeing each other because of the key alarm.
Now assuming that the cutting out & the non starting fault are the same thing & not 2 seperate faults I cant see the CPH unit causing cutting out.
If you are 100% that the ECU & double relay wiring + the double relay itself is fine then that only really leaves the injection ECU which i would say is not a common failure unless there is water in there.
Offline

whiz_bit

  • Posts: 7
  • Joined: Sat Jan 02, 2010 1:10 am

PostSun Jan 10, 2010 12:25 pm

He was working on the car for just over an hour, I saw him using a multimeter on the earth and supply pins for the ECU and the relay. He took the relay off and put voltage on it from the from the car and the all the outputs and apparently they are all correct.

He has given me the number for another guy who specalizes in keys and ECU realted stuff, I spoke to the guy the first time it went wrong and he was going to come out and reprogram the ECU, he rockened that if the battery voltage drops below a certain point the ECU get currupted, I cancelled him coming out when the problem went away.

Return to Citroën

Who is online

Users browsing this forum: addo, Bing [Bot], froggy, Google [Bot] and 7 guests