1998 toyota avensis will not start as immobiliser stuck

try using a scanner to reset the CPU program which includes the immobiliser.

disconnect the battery both leads then join them together and leave for half hour or one coffee in the local bar and a ciggy then reconnect and it should start ,this mazda uses the same software as a ford mondeo and a jaguar S type of the same year and it works on them

Hello, try doing this:

with the key out of the ignition disconnect the negative battery cable

put the key in and turn to ON, leave door open
reconnect the battery
if the alarm stays off enter the car and leave door open try to start.
This works on most non factory installed toyota systems.

ive had this problem with another make of car before, the immobiliser was stuck on stopping the car from starting, reset the immobiliser by disconnecting the battery for a couple minutes and reconnecting it. good luck.

check the main fuse in fuse box.

Hi Marino, did you have the unit recoded, this tells the computer that you have fixed it not stolen it

Radio code has no bearing on the immobiliser at all.

Normally it is down to the key not recognised. Are you using the same / usual key as before? If not then try original or another key as it may be the transponder in the key you are using.

If same key or no joy then remove the lower Black plastic steering cowls on the column (normally 3 or 4 screws) you will expose the barrell assy, on the end of this you'll see the transponder pick up ring. Disconnect from loom, apply silicone grease to pins and reconnect then try starting.

If still no joy, disconnect positive terminal off the battery, touch the lead to an earth point for 2 to 3 seconds to defuse and reset ECU, reconnect and try again.

If still noy joy you will need a garage as special reading equipment is required.

Regards

Lloyd

disconnect the battery, behind the glove box is a white 4 pin socket, disconnect this, then turn key in ignition to the point just before ignition, reconnect the battery, then turn ignition on, engine should fire, the only problem is you will have to repeat each time you start, best way is to put an immobiliser switch in between the gegative battery terminal and set it on or under the dash, hope this helps

disconnect the immobilizer

somehow the car when on valet mode, go to a alarm shop , they should be able to re arm your car without to much damage to your pocket, or read your cars manual, it might inform you on how to fix the problem.