Question about 1996 Jeep Grand Cherokee

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Hi,immobiliser problem?battery went flat,,managed to disable alarm on the fob,recharged battery,put new batterys in fob,ok for 2 days,fine in morning wouldnt immobilise in afternoon,put good second battery on,fob wont immobilise but have power?is it auto electrician time? thanks

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Hi it sounds like you have done everything you can do, it now looks like your going to need to get the immobilizer reset, this can be done at most garages but its best if you shop around to see the best price you can get as its not cheap.

have you tried locking the door with the key and then opening it with the key then try the car see if it will work.

failing that its going to need the imob re-programming so that it accepts your key fob, it may just be that you need the fob replacing as the chip inside could have failed they will be able to test all this for you.

let me know if you need further assistance, not that theirs much more i can do without being their with the equipment to test the immobilizer, hopefully it will just be the fob that needs replacing.

you could just try one last thing when you get in the car and put the key in the ignition try holding the fob as close as you can to the ignition barrel as this is where it picks the signal up from so try holding it close to their and see if that then lets you start the car

failing that its going to be a trip to the garage.

plz rate this solution as i have a whole page of unrated posts, thanks

Posted on Aug 31, 2010

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Posted on Jan 02, 2017

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1 Answer

2004 mg zr had to disconnect battery also replace the key fob case. When i reconnected the battery the alarm went off. Fob won't turn it off Can i use the key only to turn alarm and immobiliser off


Try disconnecting the battery and leaving it overnight. Unlock the car, insert the ignition key and switch on - then reconnect the battery.

That sometimes works. If it doesn't you will need some experienced advice and specialist help. Rover/MG usually needed to be opened by whatever locked the car to avoid the alarm sounding. If the key was used to lock it, then using the key to unlock should be ok though I seem to remember the alarm will sound after a short time if the key isn't put into the ignition and switched on fairly quickly.

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When replacing the key fob battery there is no reprogramming required! If the key fob was working prior to the battery replacement then it would point to the contacts not being correct! Remove key fob battery and start again!

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Will I be able to start and use my car if the key fob/plip isnt working?


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Have a 1996 nissan terrano v6 petrol. The battery went flat and I recharged it. When I put the recharged battery back in the car sounds an alarm and wont start (immobiliser?). The alarm stays on for a...


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Immobiliser fault


Spelling was fine, along with grammar and punctuation-you should see some of the mangled illegible questions we have to decipher, or try to!

But thanks for the follow-up on your problem and the solution. Who would have thought was just the battery? Responses like yours are great encouragement to keep going.

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May 23, 2010 | 1997 Volkswagen Golf

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First: alarm went off on its own.(mazda 6 2003). Now when locking and unlocking car sometimes indicators flash and sometimes not. Now red immobaliser light is flashing on dash when driving, then stops...


there is often a small back up battery in the immobiliser unit itself, if you can locate this unit and replace the battery with the ignition on / engine running, then it should not need recoding and work fine after that. The other thing that could be wrong is the key battery (if the fob has one) or the transponder chip in the key head. If the key signal is low the immobiliser lamp will light during driving, but this does not explain the alarm going off. That is more likely either a poor vehicle battery, alarm / immobiliser back up battery, or another electrical fault such as water leakage into a tail-light or even the alarm unit itself when it rains. A lot of alarms are voltage sensing and when the vehicle is parked they will alarm if the battery voltage changes for any reason, though not during driving so the battery in the immob is my first choice to look at.

Oct 24, 2009 | 2003 Mazda Mazda6

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2004 also


Take the SUV to an autoparts store that features free charging diagnostic tests. They will determine if the alternator is putting out sufficient power to recharge your battery. There's also a very good chance your battery is dead. It's not uncommon for a battery to need replacing (especially in a truck with all the bells and whistles I'm sure the Santa Fe has) after 4-5 years. It's also important to ensure there's no corrosion around the battery posts/cables (will have a white or green powdery appearance). Corrosion would prevent the battery from accepting a full charge.

I hope this clarifies your problem. It's unlikely the alarm system is the culprit provided it's not "going off" all day long. Best of luck and please feel free to post back with any other questions.
Greg

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Both fobs won't work, i cannot even start the car even with the key because i cannot turn off the car alarm, any ideas what wrong and what i can do?


Hi, i had this problem with my 96 model.. i let the battery go flat, then recharged it.

Although disconnecting the battery my work.

Assuming that the batteries dont need replacing in the fobs.

Jul 23, 2008 | Hyundai Tiburon Cars & Trucks

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