IPD sale XeMODeX - Experts in Volvo Electronics Free shipping all USA - Experts in Brakes
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

850 immobilizer fun

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

summakor
Posts: 7
Joined: Wed Jun 08, 2016 8:33 pm
Year and Model: 2000
Location: Washington, D.C.
Has thanked: 0
Been thanked: 0
United States of America
summakor

Re: 850 immobilizer fun

Post by summakor » Wed Jun 08, 2016 10:08 pm

For the V70, the ECU is linked to the immobilizer under the steering column, which in turn is programmed to recognize the proper chipped keys. Maybe replacing all three with a set (ECU, immobilizer, key) could work. Some locksmiths will program the transponder if you take it to them (easy), for example something like LostVolvoKeys.com will do it by mail. It's not cheap but better than towing the car to the dealership.

User avatar
misha
Posts: 4144
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 49 times
Been thanked: 112 times
Serbia
misha

Re: 850 immobilizer fun

Post by misha » Thu Jun 09, 2016 5:40 pm

They are linked,but ONLY in the way that immo sends ok signal to ecu...nothing else...on pre '99 models.So you would only need immo ecu and it's key.Ecu just needs "green light" from immo ecu.
'99 model car's immo system is linked with ecu in different way.In this case you would need ecu,immo ecu and it's key(chipped key) because there is confirmation code which ecu is requesting from immo ecu.

On pre '99 models it's so much simpler.
'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

Post Reply
  • Similar Topics
    Replies
    Views
    Last post