Car will not start,alarm appears to be on

Car will not start,alarm appears to be on

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Discussion

Cornwall1

Original Poster:

91 posts

55 months

Saturday 19th December 2020
quotequote all
This has previously been posted on MG forum but not getting any replies, my hope is this is a common problem on other cars Thanks.

Hello All,

I am hoping more experienced owners may be able to help me out.

I have owned my 2000 MGF for five years, any problems in the past have been resolved by charging the car battery overnight and has started first time.

The car has been off the road for a couple of months, so when I tried the remote yesterday to open the car nothing happened.

First thought was the battery in the remote needed replacing, so replaced the battery in the remote - still does not open the door!

Then tried the key which opened the central locking on both doors, but when key put in the ignition,no fuel pump noise or engine turning over,
just the sound continuous bleeping and a solid red light on the instrument panel - so is the alarm still on?

Having read the owners handbook and used the key access code to reset the engine immobilization override with the key, this should have disabled
the alarm,but when I tried to start the car the same thing happened - same problem.

So to recap, new battery in remote, fully charged car battery, car will not start.

Has anyone ever had this problem and resolved it or can suggest a fix or can you disarm the alarm another way?

I hope the above is understandable.

Any help appreciated -Thanks

GreenV8S

30,242 posts

285 months

Sunday 20th December 2020
quotequote all
Did you check the voltage on the car's battery? If the alarm was powered off while armed, it may need a special reset sequence. The PIN you entered seems like the right sort of thing but may not be the end of it.

For comparison on my Mondeo when the battery ran low a few months ago, it no longer recognised either of the remotes and sounded the alarm when the door was opened using the mechanical key. But it went back to normal when I put the key next to the NFC receiver and started the engine.

In your case, I suggest making sure the battery voltage is OK should be the first step.

PositronicRay

27,098 posts

184 months

Sunday 20th December 2020
quotequote all
I had a similar problem in my merc albeit older tech.

Resolved by using contact cleaner and reseating the connectors to the alarm ecu. Can you read the codes?

Cornwall1

Original Poster:

91 posts

55 months

Sunday 20th December 2020
quotequote all
Good news - Problem solved

First of all thanks for the replies.

The problem turned out to be the fob, the battery carrier were it is soldered to the PCB was cracked in one position,soldered it again and it worked.

What I have found out is that without the fob working, no one will ever be able to start my car.

Hope this helps someone in the future.