K series imobiliser problem....Fixed

[1in7]

Help.. I have a standard 1.6 K 2007 EU3 car with the standard ‘Rover Robust Imobilser’ and black fob, and it won’t deactiveate, and the car won’t start. I noticed on few occasions over the last few weeks that it behaved a little oddly when deactivating/activating so I changed the fob batteries as a precaution and it seemed OK for a short period until this morning when it wont start. The red led comes on, the engine turns but dies as if the immobiliser is still activated.

The arming/locking of the immobiliser is normal with the clicks and indicators and the rapid flahing of the led which lthen settles down, but im not convinced the disarming process is clean. It clicks once and the indicator flashes once and then there’s what seems like ‘half a click’ and the indicators don’t flash with this ‘half click. (Can anyone confirm it should deactivate with 2 clicks and 2 flashes?) The led light goes off though but the engines wont start as above. This happens with both fobs and I have removed the fob batteries again, reset them and disconnected the car battery and done a ‘reset’ by clickin the lock button 4-8 times and then the unlock,but no luck. I have also done the deactivate and activate sequence 5 times as well. The car will not disarm.

The main battery is good and the fuel pump wirls as normal prior to starting.

Any ideas? If not does anyone know a good specialist in the Bristol area?

 

 

[JonL]

I thought that the immobiliser stopped the fuel pump from working so that the engine would turn over fine, and initially start, and then stop due to lack of fuel. Therefore even with the immobiliser activated the engine should still turn over. I am not sure if that is what you are experiencing.

I appreciate that this is not very helpful, other than if you are experiencing something else, maybe you can rule out the immobilser.

Jon

[Jonathan Kay]

Have you made any changes to anything recently?

What's the battery voltage at rest and as you try to start?

Jonathan

[1in7]

Jon(s)

Thanks for the reply I phoned Tony at Caterham cars as well and he was helpful in offering a coouple more pointers which i checked. Tony phoned back after talking to a colleague who mentioned it could be the battery. if it dips below a certain level there wont be enough for the imobilser. I jumped it from my MX5 battery and it started!!!! result. Even though my car is used through the winter and put ion the Ctek now and again, it looks like its on its way out.  I now need an appropriate battery but that great news compared to where i was a couple of hours ago.

Kind regards

 

1in7

 

[Jonathan Kay]

:-)

Jonathan

[davestevenson]

Yup, I had that a couple of years back with the original Banner battery (2007 1.6l EU3 K-series, same as yours).

Immobiliser would disengage as normal via the fob. Hit the starter button and the engine would turn over happily, but the voltage drop was such that the immobilser would come back on solid red and stop the fuel pump. New battery time. (A PowerVamp 25 and battery conditioner have held off the issue since).