Strange Electrical Goings On...

[Johnny50]

Bit of a long winded one this.

Car has been sitting for 3 days, usually not a problem....

This afternoon the alarm went off twice in the driveway so I went out.

There were a few warning lights up on the dash without the key being in, however it started just fine.

Took it a quick run but on my return, it wouldn't switch off, key completely out and engine still runs.

Stalled it to get it off and now it will not start , battery light/handbrake light remain on dash without keys also..and central locking not working.

Used my Shark STS to get fault codes 19463 and 17978. One relates to immobiliser and other to camshaft position sensor.

I cleared them, still no change so I uploaded the standard map and it started, but then same scenario, won't turn off etc, stall it, won't start, lights stay on dash.....

Anybody any ideas?

It makes no difference as to which key I try.

Car is an 05 Elegance and has previously (years ago) had a new ECU from Shark when it belonged to the previous owner.

[Ootohere]

So basics first,

is the battery fully charged and are the Earth & live terminals all OK.

[Johnny50]

No way of checking battery charge but all connections are ok.

It's currently sat with the battery disconnected.

For thr price of them, I may just buy a new one tomorrow to rule it out.

[Johnny50]

Just to add, I reconnected the battery tonight. And the immobiliser lights flashes along with the glow plug light.

However, it still started, just doesn't shut off.

[DanHarper]

Ignition switch faulty? 

 

Could be that it never goes to the 'off' position so you get dash lights, but without the key in then the immobilizer will be active.

[dylofpoke]

If the key is in the on position but without the engine running, then you switch off and remove the key, do all the electrics go off as they should?

[Johnny50]

If the key is in the on position but without the engine running, then you switch off and remove the key, do all the electrics go off as they should?

No! The handbrake light etc stays on. Although headlights/fan will switch off so it at least recognises it's not fully on.

Confusing.

[dylofpoke]

Confusing.

Innit.

[Johnny50]

After all that, 3 faulty cells in the battery.

New one fitted, car is fine now. Thanks for the input.