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ECU Swapping to get live numbers?

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

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ECU Swapping to get live numbers?

Post by shihabafi » Sat Jul 14, 2018 8:05 pm

I have a '95 850 with and OBDII reader, but it doesn't show live data.... or if it does, I haven't figured out how to find it. So I was wondering if I could just yank an ECU out of a '96 model, and just throw it in mine, and reap the benefits of live data. Would this work?

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Re: ECU Swapping to get live numbers?

Post by Clemens » Sun Jul 15, 2018 2:10 am

Well, I don't know about the swapability of 96 into 95, but without modifications the live frame data frombthe 96 ECU is not very good (sliw rate). Va5t Tuning ogfers an updated ECU glash for higher livefram data rates.
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Re: ECU Swapping to get live numbers?

Post by misha » Sun Jul 15, 2018 10:01 am

It isn't possible because of totally different managements,wiring,ecu pinouts,sensors...etc.
'95 non turbo is 3.2 LH Jetronic vs.Motronic 4.4.
'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
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'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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Re: ECU Swapping to get live numbers?

Post by esl_97_850_T5 » Thu Sep 13, 2018 4:27 pm

Came across this thread while trying to find the thread that abscate said he was going to "split off the meta topic of What comes with what since we are peeing in Shihab's diary too much"...

As per my experience scanning Shihab's '95 850 on 2018-09-08 (using either volvo850diag on Win7 w/ OBDLink SX USB, or xiaotec "850 OBD-II" V1.0.7 app on Android w/ OBDLink LX BT) and successfully reading OBDII data in both cases, his 95 850 *can* indeed be scanned by standard, common OBDII software/hardware. I'll post the details in shihabafi's viewtopic.php?f=1&t=85982 "Diary of a 17 y/o with an 850" thread (probably) later today or tomorrow.

Since Shihab prefers to use his iPad and cheap ELM327 WIFI device to perform diagnostics, maybe someone here that consistently, successfully uses iPad (or iPhone) and ELM327 WIFI might offer some suggestions to Shihab of what software works for you. He probably wants something roughly equivalent to Torque in the Android world, but free or low cost, and works with his ELM327 WIFI and iPad. [Since both iPad and ELM327 WIFI are outside my realm of experience, someone else can surely help him better than me.] IIRC, I'm near certain that someone here at MVS has used both an iOS based system with an ELM327 WIFI device to do some scanning of '96-'98 850/SVC70. And his '95 850 behaves similarly as far as OBDII goes.
These users thanked the author esl_97_850_T5 for the post:
1998 Volvo S70 GLT - 205.5K miles - S70 & M44 testbed in 2016-2019; traded 2019-07-15 (for spare time)
1997 Volvo 854 T5 - 147K miles - 850 testbed in 2012-2017; junked 2017-09

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