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Discussion Starter #1
Hi All,
156 Immobiliser key light comes on ok
drove car 60 mls no issues. went over road hump car cut out.
156 Immobiliser key card light on dash not on, will not start,
fuse for key Immobiliser under dash blown so replaced,
go over another road hump to get back out of road and car cuts out,
same fuse blown, visually checked relays next to battery
and replace fuse.
Have tried to find 156 Immobiliser under dash but not in the same
place as this

http://www.alfaowner.com/Forum/alfa-147-156-and-gt/154576-guide-to-fixing-156-immobiliser.html

http://i213.photobucket.com/albums/cc90/imclaren/immo/cover-on-off.jpg.

Any help please.

please dont say avoid road humps :cheese:

regards
 

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Never seen a 156 with an immobiliser code box that wasn't fitted above the fuse box.....they aren't easy to get at, though. I'd be more inclined to check that the wire from the immobilser aerial (fitted round the ignition barrel) to the code box isn't trapped in the column or its brackets....and that the wiring to the relay in front of the battery isn't damaged and shorting...
 

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Try replacing the relay under the label Inj. (fuel injection system) from in front of the battery, and maybe give the connections a spray of electrical contact cleaner while you're there.
 

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Discussion Starter #4
Try replacing the relay under the label Inj. (fuel injection system) from in front of the battery, and maybe give the connections a spray of electrical contact cleaner while you're there.
Thx to you both but which relay is that? the box housing is not showing any info
 

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Different problem with potentially similar cause - our 156 V6 had an ECU light that wouldn't go out and was throwing up loads of fault codes. Changing sensors and fuses was not working.

Eventually traced the fault to the wire that connects the AFM to the ECU - the rubber grommet on the bulkhead had fallen out and the wire had rubbed through on the metal of the bulkhead, causing a short. Cost £50 to have the fault traced and the wire soldered.

Good luck sorting yours
 

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Thx to you both but which relay is that? the box housing is not showing any info
Should be on the row closest to the battery and left-most relay when stood in front of the car looking into the engine bay, provided all the relay holders are clipped into the correct position.
 
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