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Theory of Operation of 99 C70 Computer Communications

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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FLBoy
Posts: 9
Joined: 16 July 2019
Year and Model: 1999 C70
Location: Pensacola, FL
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Theory of Operation of 99 C70 Computer Communications

Post by FLBoy »

I have no communications on my 1999 C70. I've studied up on how to diagnose a CAN bus, but I just learned this vehicle isn't CAN. Where can I learn how this car communicates between controllers?
1999 C70 Convertible White 63K

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misha
Posts: 5379
Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
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Post by misha »

'99 & later cars have CAN network.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
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

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abscate
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Posts: 35267
Joined: 17 February 2013
Year and Model: 99: V70s S70s,05 V70
Location: Port Jefferson Long Island NY
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Post by abscate »

It’s half CaN

😀

Canbus between ecu CDm immobilizer tcu? And lock module , I believe
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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