Immobiliser/alarm (1 Viewer)

[ghoster]

We have an Adria Ducato Sunliving which occasionally will not restart after stopping. Usually after repeated turns of the key it will restart but this can be several frustrating minutes later. When it does not start there is no indication that anything is happening. An AA man when called out thought it was a sticky starter motor. He actually saw the issue and repeatedly turned the key and then it suddenly started.
As the van needed a service I asked Adam’s Morey of Southampton to investigate. They could not reproduce the issue but said they suspected the Alarm / immobiliser but as this was an after market addition they could not investigate further. For information it has a Vanguard Thatcham Cat 1 alarm and an S5 immobiliser.
The van is out of warranty and ideally I do not want to travel to Newark to have them look at the issue when it may not be the aftermarket additions they fitted.
Has anyone had similar issues or ideas on how to go about sorting this issue. Thank you.

 

[SIFTA SAM]

From what I remember, my immobiliser (Sigma?), had a similar intermittent starting problem which fortunately (?) turned permanent at home and was the 12v supply to the starter solenoid. This supply was bypassed round the immobiliser allowing same to operate by just controlling the 12v supply to the fuel pump instead of both. Never bothered fitting a new unit.

 

[brynric]

I had a similar problem, I replaced battery, had wiring/connections checked, disabled immobiliser and it continued to happen. It only happened when the weather was hot and it would start after a short time cooling. Then I had the starter motor replaced and it’s never happened again.

 

[Pausim]

Cat 2 immobilisers have been standard on vehicles for a long time. A Cat 1 immobiliser upgrades this with further safeguards. My NFU insurance very specifically states that the theft insurance is only valid with a Cat 2 immobiliser so I would be careful about bypassing it.

 

[brynric]

Cat 2 immobilisers have been standard on vehicles for a long time. A Cat 1 immobiliser upgrades this with further safeguards. My NFU insurance very specifically states that the theft insurance is only valid with a Cat 2 immobiliser so I would be careful about bypassing it.

I agree. I disabled the aftermarket immobiliser (in a field in Denmark with excellent advice from Ash VanBitz ) to remove it from the equation. The Fiat immobiliser I already had replaced after intermittent faults (in a car park in Denmark)
The symptoms of the fiat ignition immobiliser were quite different from the starter motor non start.