9-5 alarm

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c. leeds - 24 Jan 2008 14:57 GMT

I have an '00 9-5 Aero and am getting periodic "service theft alarm"
prompts on the SID. When the car is parked and locked, the alarm will
periodically activate without provocation.

The dealer - who is usually excellent - can't find anything wrong and
doesn't get a fault code from the car.

This is a U.S. car with about 100,000 miles.

Does anyone have any suggestions? Thank you for your help.

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Andrew Sinclair - 24 Jan 2008 19:11 GMT

> I have an '00 9-5 Aero and am getting periodic "service theft alarm"
> prompts on the SID. When the car is parked and locked, the alarm will
> periodically activate without provocation.

The usual two faults that trigger this behaviour are;

1) Siren batteries dead

and

2) Tilt sensor faulty.

You can shut the tilt sensor out of the alarm system by pressing the
night panel button when leaving the car, SID will bleep and say 'doors
only', try doing that for a few weeks to see if the random alarms stop -
if they do then it'll be the tilt sensor.

ISTR that 2) will generate a fault code (but you need a Saab dealer with
Tech II as generic code readers can't pull the Saab specific B (for
Body) codes so if you ask your dealer 'Is it the tilt sensor' and they
say no then my money is on the batteries in the siren. The official fix
is a new siren module ($$$$!) the unofficial fix is to fit some new
batteries - have a look around using Google, it is documented on one of
the Saab fora (saabcentral.com I think).

Andy

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Gary Fritz - 24 Jan 2008 23:18 GMT

> the unofficial fix is to fit some new
> batteries - have a look around using Google, it is documented on one of
> the Saab fora (saabcentral.com I think).

I can't find the link for it offhand, but I did have the instructions.
When the alarm in my '02 Aero started throwing that error, I pulled the
siren module and discovered it had changed since the instructions had been
posted. It was no longer openable with screws, but heat-welded together.
I tried tearing it apart and finally decided I would probably destroy it if
I ever got it open.

Since I don't worry much about car theft here, I just had my mechanic clear
the error and tell the car not to throw the error any more. I've been
running without a siren since then. It has the advantage (or disadvantage,
depending on your preference) of locking/unlocking silently now. :-)

Gary

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Certainly - 25 Jan 2008 04:56 GMT

> I have an '00 9-5 Aero and am getting periodic "service theft alarm"
> prompts on the SID. When the car is parked and locked, the alarm will
[quoted text clipped - 6 lines]
>
> Does anyone have any suggestions? Thank you for your help.

U.S. models would not have a tilt sensor involved, that is a European
option. The siren battery code will set as quick as it will clear, the
twice does not store a history code for this.

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