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Re: Immobilizer Failure Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: Re: Immobilizer Failure, acoates, Mon, 21 Feb 2011 19:34:32 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I think John was kind in only mentioning 4 modules.
ISM, CIM, MIU, T8 ECM, BCM and ICM would be maybe more complete but I might even have forgotten some.
ISM is where you stick the key in and that sends a signal to the CIM which wakes up and check that the MIU (main instrument), BCM (body control module and PDM (passenger door module) belongs to the car.
If that comes back okeedoki, CIM send immo off on the BUS and the T8 ECM picks it up from there and turn off fuel shutoff.
If things are not ok, a signal goes to the ICM which displays the immo disagreement on the SID.
That's kind of the short version.
Anders
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