I have a 1997 525tds. the ignition key has sudenly stopped turning the engine !. everything else works, the key opens the central locking on the doors, the dash lights up as normal but the key wont turn the engine over. there is no power drain at all, the lights in the dash dont dim and i no the battery is fine. any sugestions ?
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There is only one fuse that mentions 'Locking', but also refers to the General Electrical Module (GEM). If you change the fob battery, you need to reprogram it to the vehicle. Or you could open any Transit around you. Lots of help below including resetting..
If the key had gone faulty, the key code must be re programmed on the vehicle computer. This can be done only using a PIWIS tool, available at the dealer or at a qualified Porche garage. Try also the following reset: turn ignition on, turn off. remove
the transponder from the column push any button on the fob within 6
seconds. This procedure will reset the key synchronizing again with the vehicle computer.
check the shifter if it is an automatic and is not in park or neutral properly the the switch will not trigger, making the car think it is still in drive or reverse. Sometimes it is just to wiggle it a bit to trigger the safety switch, or can also be the steering wheel lock, sometimes there can be some friction on the unit and is just to let it off buy turning the wheel slightly to release it. you will have to do this simultaneously with turning the key as when you release the wheel the presser will return.
It may start the engine fine, meaning it has a good ground, BUT, the ground from battery to the body is NOT. Make sure that connection is good and clean.
Providing central locking works when you insert key in lock,try programming keys
Enter car make sure all doors/windows are shut
Switch ignition on and off,remove key
PRESS AND HOLD UNLOCK BUTTON ON KEY
Press lock button on key 3 times whithin 10 seconds and release unlock
Central locking will lock/unlock rapidly to confirm reset
If your key is the type with bmw logo in the middle battery replacement is not possible,as it charges as you drive
You must reset your remote control in order for the lock/unlock to work properly.
To reset remote you would: 1)Insert Key in Ignition Turn to Position 1(Don't Start the Engine) for about 5 seconds 2)Turn Key Off and HOLD the LOCK button on Remote while pressing the UNLOCK 3 TIMES 3)Release both lock and unlock buttons you are holding 4)All doors should automatically unlock
with any BMW they have their problems, one is the central locking/immobilizer, the central locking is linked into the immobilizer and vice versa, the immobilizer takes it signal to disarm from the central locking and the ignition key ring. (chip in the key) if one of these starts to play up it has loads of consequences this being one of them. they all need to work together for the system to work properly. you would need to read the alarm and immobiliser codes using an ob2 tool that can detect them, and find the fault some problems it can be the drivers door sensor in the lock this is the main door as its drivers side and it controls all other doors on the central locking. if the switch is worn in any of it movements the system will not know the door has been opened, this does not work on the interior light as that is a switch in the door frame. the door lock is lock unlock and deadlock with key with remote fob its also arm disarm alarm and immobiliser. i have seen in some models there is a sensor auto lock so when you walk away with the key the doors lock automatically all lease parts work together. any one having a problem can cause no signal to be sent to the others in the system to start engine .
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