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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars

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What exactly is this please help

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Old Feb 22nd, 2020, 22:55   #1
Palehorse940
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Default What exactly is this please help

As the title guys I’m guessing it’s for the alarm any help thanks. Dave
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Old Feb 23rd, 2020, 08:55   #2
J liddy
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Its the alarm .do you have the type 1 grey key fob that activates door locks and sets alarm and imobiliser?
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Old Feb 23rd, 2020, 14:46   #3
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More specifically, it is the receiver for the RF (or in some markets IR) fob which arms and deactivates the alarm. It also contains some LEDs which indicate whether doors are open and whether the alarm is armed or has been activated. There is a button that can be used from within the car for programming the alarm.

At 25+ years old these units are apt to be a bit troublesome, but in my experience are easier to DIY repair than the later Volvoguard 2 alarm. It is possible that a PO may have bypassed the alarm relay (hidden behind the dash) if they no longer had a working fob (NLA from Volvo).

Key pointers if you plan to play with it are:

There is information in the user manual about how it is supposed to operate.

There is a very useful service/programming manual available online which tells you how to programme fobs and features. It is the Volvoguard 1 variant.

The receiver (the bit you’ve photographed) can easily be adjusted or repaired if the fobs no longer work from a distance.

The fobs can generally be repaired with basic soldering skills if they no longer show the red light nor operate when the button is depressed.
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Old Feb 23rd, 2020, 16:10   #4
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Cheers guys I’ve not got a fob is it possible to get one and programme it my self. Cheers again Dave
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Old Feb 23rd, 2020, 17:44   #5
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Yes. You might encounter some of the snags I mentioned in my last post. Your first challenge is to obtain a fob like the one pictured. Not the later, smaller black two-button fob.
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Old Feb 23rd, 2020, 20:07   #6
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yes you need this very fob . i don't know if the later fobs are compatible ! what year is your 940 ?
one just sold on ebay don't know what it went for !
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Old Feb 23rd, 2020, 20:48   #7
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Cheers guys. He’s a 1994
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Old Feb 24th, 2020, 17:08   #8
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I would just disconnect the alarm and bypass the immobiliser if its still fitted.

If its still connected but just disarmed, it may eventually go nuts and lock you out of the car or arm the alarm or both. They don't last the life of the car unfortunately.

It will be under the steeringwheel tie wrapped to the loop. Just remove it and connect the starter motor immobiliser with a wire. You will need some private info to do that.

Or if you want an alarm/immobiliser fit a decent after-market one. They don't cost much these days.
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Old Feb 24th, 2020, 19:23   #9
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there will be a fuse behind knee panel under steering wheel or it will be in engine bay think its near ABS pump unit!
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Old Feb 24th, 2020, 20:51   #10
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Quote:
Originally Posted by TonyS9 View Post
I would just disconnect the alarm and bypass the immobiliser if its still fitted.

If its still connected but just disarmed, it may eventually go nuts and lock you out of the car or arm the alarm or both. They don't last the life of the car unfortunately.

It will be under the steeringwheel tie wrapped to the loop. Just remove it and connect the starter motor immobiliser with a wire. You will need some private info to do that.

Or if you want an alarm/immobiliser fit a decent after-market one. They don't cost much these days.
Right I’m a bit confused sorry mate. How do I do all that and what what private info do I need. Don’t fancy it locking me out. Cheers Dave.
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