What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks

Alarm / Immobiliser problem

I have trawled the topic thread already and tried numerous solutions thus far to no avail.

My car which i have had for a few years has developed this problem as described by many others.

The key fob no longer works for entry to the vehicle. Entering with the key produces the problem that the car will no longer start. Upon trying to start the car the following occurs - all lights come on and then go off as required, then once trying to start the alarm set light flashes continuously and the car fails to start. I have checked things like the heater plug which appears to have no problem i have also removed the top dashboard section and checked the connections etc there, still nothing. I have tried starting the car with the heater plug & top dash section disconnected... still nothing. I have also tried disconnecting the battery and still nothing.

Asked on 24 August 2011 by happyhector

Answered by Alan Ross
It may be that you need to reset the ECU. You say you have disconnected the battery, but try this. Disconnect the battery and leave for 1 min. Then reconnect BUT DO NOT switch anything on at all, just leave for 30 mins. Then try to start the engine.
By doing this it allows the ECU to reset itself.
Similar questions
The hot weather is triggering the alarm on my 2009 Ford Mondeo TDCi 140 Estate. It goes off at 10pm and 4am, everything else with the car is fine, and the problem has only started with the heat wave. Do...
I see that you are testing the Renault Kadjar as a long term test car. Have you had the same problems as me or is your press car specially prepared? The alarm constantly goes off and the DAB radio loses...
I have a 2006 Saab 9-3 and the alarm keeps going off. I need to check the batteries in the control unit, but I have been unable to find it so far. I have checked the boot and under both front wheel arches,...
 

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 12% on GAP Insurance

Use HJ21 to save on an ALA policy

See offer