I have a problem with my immobiliser/alarm. here are the symptoms.
1.When locking with the fob it takes round 20 min before the alarm goes off. I have locked it with the key (single lock not double) and all seems to be fine. So i suspect its the Volumetric Sensor as single lock disables this. Is this a correct diagnosis?
2. Today I had an immobiliser problem. I unlocked using the remote fob and the dash light stopped blinking (as usual) when turned to position 3 no turn-over of the engine. I tried using the overide method with the key in the drivers door (as this has worked before) and still nothing. I took the time to take a few notes, all the electrics work (central locking, window, radio, lights, everything), I can hear the fuel pump in the rear start, but nothing from the starter solinoid. And after 3 hours and many attemps she started fine. I then allowed the immobiliser to kick in again another 5 times and she started fine. this has been happening on and off all day and a week back in April.
Now to help remove some suspects.
I have new batteries and syncronised both fobs and used both keys....no differance. (fobs are for Cent Locking as I already know) I have the old style bendy key so I dont know if it is chipped but this shouldnt make a differance as both dont function.
I have checked all fuses and they are all intact.
After doing a fair amount of reading on forums I would like somebody help me eliminate or suggest some causes.
Could It be:
the control unit for the alarm (behind the drivers instruments)?
any of the relays?
the passive reader in the ignition or the ignition?
Maybe its just easier to buy a whole new system or just bypass it for once and for all and just leave the cental locking system.
Any advice would be great as I could start eliminating any suspects and get too the true problem maker.
Sorry for the long post and thanks in advance.