MGF not starting

[Yigit]

My MGF did not start tonight. Here is the story. I washed it as usual then tried locking it via the key fob, the key fob did not lock it, i thought it must be the batteries of the fob running low and locked it via the keys. When i came back after 30 mins., the keyfob did not unlock it so i tried the other fob and it did not unlock as well. Anyway i unlocked the car with the key, but this time i could not start the car because i could not turn off the immobilser with the fob. So the fob does not lock/unlock, electrics still work, i can listen to the radio but i cannot start the car. I disconnected the battery for 1 mins, did not help, checked the fuses which are fine. Suggestions pls.

[bandit]

Hi Yigit,

The alarm ECU takes a signal from both door locks, and in my experience can become unpredictable if there is a bad connection on one of the microswitches in the lock. If you remove the door panel, you will see two plug connectors on the lock - check these for evidence of water (I suspect the fact that you had just washed the car is relevant...) and clean the contacts. The microswitches inside the lock can fail too, and the ECU for that matter, but I've regularly seen corroded contacts and evidence of water in those two connectors.

Also worth disconnecting the battery for a longer period, ideally overnight, which will let the alarm ECU re-set fully (I'd recommend disconnecting the horns before re-connecting, in case it suddenly gets loud ;D ).

[Yigit]

Cheers mate, good advice.

[nigelc]

yigit said:

My MGF did not start tonight. Here is the story. I washed it as usual then tried locking it via the key fob, the key fob did not lock it, i thought it must be the batteries of the fob running low and locked it via the keys. When i came back after 30 mins., the keyfob did not unlock it so i tried the other fob and it did not unlock as well. Anyway i unlocked the car with the key, but this time i could not start the car because i could not turn off the immobilser with the fob. So the fob does not lock/unlock, electrics still work, i can listen to the radio but i cannot start the car. I disconnected the battery for 1 mins, did not help, checked the fuses which are fine. Suggestions pls.






I had a similar problem with my F it turned out to be the car battery had a dead cell would be worth trying another battery or just a set of jump leads from another car would do the trick,If you want to get really technical remove the battery and have it drop tested this will show a dead cell straight away,It may not be the cause but it is worth a try and it doesn't cost anything to test,
Good luck.

[Yigit]

After work i went to the garage to try and fix my car. I pressed the unlock button on the fob just once and it unlocked the car. Pressed lock and it also did its job. Tried it several times, worked fine. Started the car, no probs. I really could not understand what went wrong but hope it wont repeat itself. Oh i disconnected the battery and will keep it that way to reset the alarm ecu.

[PHLEB]

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