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Old 19th May 2008, 16:03   #7
EamonnS
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Default Is the transponder in the key active or passive?

My 75 Tourer has just started playing me up with the immobiliser. What triggers the transponder chip when it is in the ignition lock? Is this a passive transponder or does it rely on a battery in the key? Is there a way of completely bypassing the immobiliser? This is now happening with both of my keys. HELP!!!!!

Quote:
Originally Posted by lowedb View Post
Immobilser and locking aren't actually linked (other than they both live inside the key head).

The alarm / locking transmits when you press they fob. The immobilser has a transponder chip which only transmits when it's in the ignition lock. The ECUs that receive the signals are different too.

So sorry, the theory doesn't stack up, and as pointed out an immo lockout also prevents cranking.

Last edited by Simon; 19th May 2008 at 17:13.. Reason: Fixed quote
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