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any way to disable the factory alarm ?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

BillyI
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any way to disable the factory alarm ?

Post by BillyI » Fri Feb 11, 2011 4:13 pm

does anyone know if the factory alarm actually disables the car from starting ? If so is there a way to disable the system without affecting other car functions? My kid had a dead battery/jump start episode .Apparently the sequence of events (dead battery ,unlocked doors ,ignition left on ,etc.) triggered the alarm ,which turns on the hazard flashers ,independent of switch control .I thought I had some electrical ghosts until I read the owners manual (go figure ) I would just as soon disable the alarm system then keep it turned on . Thanks -Bill

98 S70GLT Turbo w/211k on the clock

Ozark Lee
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Ozark Lee

Re: any way to disable the factory alarm ?

Post by Ozark Lee » Fri Feb 11, 2011 4:27 pm

Remove relay 210/211 and use a jumper wire to jump the socket positions associated with pins 50E and 50F on the 210 side of the relay.

The relay itself is located in the lower central electrical unit which is inside of the car. It is mounted high on the inside of the firewall just below the main fusebox. It takes 3 T-25 Torx screws being removed (and some contortionism) to get the lower dash panel off and to get to the lower central electrical unit.

If you have a dealer nearby they can sell you a dummy 210 relay that has the jumper wire built in and it just plugs into the 210 socket position but I shudder to think of what they would charge for it.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

BillyI
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Re: any way to disable the factory alarm ?

Post by BillyI » Fri Feb 11, 2011 4:43 pm

Thanks Lee .Is the 210/211 relay a double relay like the 104/108 ,101/102 relays found under the supplementary fuse box cover ?Once the pins are jumped does the relay(s) get plugged back in ,or is it just left out ? Do you know if the alarm actually keeps the car from starting ?

...Bill

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misha
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Re: any way to disable the factory alarm ?

Post by misha » Fri Feb 11, 2011 5:21 pm

Yes,alarm/immobiliser will prevent the car from starting,but in that case you will have a flashing red little light in the center of dashboard just by the windshield.When that little light flashes,that means the alarm/immobiliser is activated.

When you complete the procedure of jumping the relay,like Lee adviced you,then just plug the relay back in it's place.

Something just felt on my mind :!: ....maybe you will not be able to read & clear the engine codes when you jump the alarm/immobiliser relay because diagnostic line(k line) goes through the immobiliser.Am i wrong?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

Ozark Lee
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Posts: 14798
Joined: Thu Sep 07, 2006 8:24 am
Year and Model: Many Volvos
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Ozark Lee

Re: any way to disable the factory alarm ?

Post by Ozark Lee » Fri Feb 11, 2011 7:12 pm

The 210/211 relay is a double relay as you described. If it were me I would just leave the relay out and forget about it. I live in a very low crime area so car theft on 15 year old Volvos isn't a huge problem in my case. Your local conditions may vary.

I will need to revisit the schematics to see if it will impair your OBD functions as Misha suggested but that requires a Linux network shutdown and a Windows boot so it may be later in the weekend before I can answer that question.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

Jack Rock
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Re: any way to disable the factory alarm ?

Post by Jack Rock » Sat Feb 12, 2011 9:14 am

If I may jump in, I've also been trying to accomplish disabling the alarm on a 98 V70 but there is no relay 210/211, just an empty spot. The alarm is still active. Any ideas?
1997 850 T5 (gave up at 324,000km)
1998 V70 R AWD (gave up at 296,000km)
1998 S70 T5 (total loss - in a parking lot!)
1999 V70XC
1975 VW beetle
1960 Empi Sportster Dune Buggy

jimmy57
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jimmy57

Re: any way to disable the factory alarm ?

Post by jimmy57 » Sat Feb 12, 2011 11:34 am

98-2000 s70/v70/xc70 and 98-2004 c70 use Denso made alarm using a control module that is to left and up under dash, almost behind headlight switch.
Pin B21 of alarm module grounds starter relay 2/35. Relay 2/35 contact closing coil is powered by ignition switch starter terminal.
If the alarm module doesn't provide the ground to start relay then the relay doesn't provide feed to starter solenoid and no cranking results.
Usually locking the car and then unlocking it should reset the alarm. The alarm module is also the door lock, fuel cap unlock, trunk lid latch, and interior light module.
Fuses 2, 13, and 18 are all feeds to the alarm/lock/light module. Those are the fuses in the box just in front of windshield on driver's side cowl.

drkaeppel
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Re: any way to disable the factory alarm ?

Post by drkaeppel » Sat Feb 12, 2011 1:00 pm

I guess I have a somewhat related question. If I wanted to install a new stereo/headunit, will the alarm system cause issues?

jimmy57
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Re: any way to disable the factory alarm ?

Post by jimmy57 » Sat Feb 12, 2011 1:26 pm

no, no alarm wiring related to audio equipment.

Jack Rock
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Re: any way to disable the factory alarm ?

Post by Jack Rock » Sat Feb 12, 2011 5:45 pm

Jimmy57, I think what you're saying is that since it's an all-in-one deal, there's no way to disable just the alarm?

I was hoping to disable the alarm because I've been trying to no avail to use a remote starter for lock and unlock (baby steps!). I've got the central locking unit out and pulse gray/red with negative (all remote starter documents suggest this as does the wiring diagram from this site) but can't get the alarm to disarm. If I sit in the car with the alarm disabled and manually lock the door, the remote starter unlocks it no problem. It will also lock but does nothing if the alarm is set.
1997 850 T5 (gave up at 324,000km)
1998 V70 R AWD (gave up at 296,000km)
1998 S70 T5 (total loss - in a parking lot!)
1999 V70XC
1975 VW beetle
1960 Empi Sportster Dune Buggy

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