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i cannot turn off immobiliser?

i have a rover 400 1998 and lately when i use the keyfob to unlock the car i cannot start because the immobiliser won't turn off. i put a new battery in the keyfob and in the spare one as well and tried to start with both but will still not work.i even tried the keycode lots of times and waited for half an hour and tried the keycode again left right left right and left to open still will not work. the keycode worked before well 13 hours later when i had to go back and pick it up from the side of the road. i have tried lots of different ways like opening the doors and closing them and still no luck. i really need to get it going for work and am stuck now. a mechanic said he could get it working with the computer for 130 euro and i said no cause i know it will just happen the next day. please help as i need to get it going to get me to work. thanks

colin
October 2007
Hi

To be honest, it sounds like you need to replace the batteries in the fobs! They're CR2032 watch batteries.

Here's a correct and accurate description of the "left/right/left/right" procedure, in case you didn't have quite right. Alternatively, maybe you don't have the correct code - in which case NEVER lose the fobs - or more sensibly pay an XPart dealer for all the car's security information now before that firm goes out of business (in Rover's footsteps)! A dealer supplied all three secret codes for my father's Rover 45 for £10.

If you know the immobiliser code and your problem is (merely!) that your fobs aren't working (and so can't be re-scynchronised), you can use the immobiliser override procedure. This involves entering the code, digit-by-digit, by "pulsing" the key alternately to the unlock/lock positions to enter each digit in turn:

1. Jot down the 4-digit code - don't let it blow away!
2. Close all the doors and bonnet, lock the car with the key and withdraw it.
3. Insert key into the driver's door lock, turn key to the right and hold for 5 seconds. Return key to vertical.
4. Turn the key to the left briefly and return to vertical, for the number of times of the 1st digit of the code. For example, if the 1st digit is 8--- "pulse" the key to the left EIGHT times.
5. Turn the key to the right briefly and return to vertical, for the number of times of the 2nd digit of the code.
6. Turn the key to the left briefly and return to vertical, for the number of times of the 3rd digit of the code.
7. Turn the key to the right briefly and return to vertical, for the number of times of the 4th digit of the code.
8. Turn the key to the left/unlock position and open the door. If it's worked, the immobiliser LED on the dash will not be lit - and the engine can be started.

If an incorrect code is entered, the car horn will give a momentary "beep". You can try again by opening and closing the driver's door; the car only knows you've done that if the interior lamp switch is works properly. Check the interior lamp lights when you've opened the door, if not give the switch (mounted on the doorcase at the latch end) a manual wiggle to operate it! If you enter an incorrect code three times, you must wait ten minutes before resuming attempts.

Once the immobiliser has been deactivated as above, it will remain so indefinitely (and not protect the car from theft!), until the car is once more Locked with its radio-fob. It doesn't reactivate just by having been locked with the ignition key.

If you've never had the radio-fobs or known the immobiliser code, you're more seriously stuffed. You'll have to go along to an ex-Rover dealer with proof of your ownership (V5c, bill of sale, insurance certificate etc) and buy new fobs and pay for programming the fobs and the immobiliser to match. While they're busy looking-up the codes associated with your car, ask them to also supply you with: the key-cut code, radio code and immobiliser code. Ex-Rover dealers are frequently now XPart Service Centres, find them at www.xpartautoservicecentre.com

First rule of buying a Rover: Get two genuine keys and working fobs (test them), the key-cut code, radio code and immobiliser code. These are often written in the spaces for them on detachable cards on the inside back cover of the Owner's Handbook.

Best Wishes

SS
November 2007
scrap it mate

jim
November 2007

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Mend Security Systems, Car Alarm Systems
Free repair help for Rover car alarm systems