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98 V70:Cabin Blower Speed Vehicle Speed Sensitive? Topic is solved

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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sleddriver
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by sleddriver »

Update:
Queried another indy about this. He said it's the ECC. I also thought I'd temporarily disconnect the VSS signal to fool the ECC into thinking the car is always at rest. I may have to actually tie the ECC controller pin/lead to ground, to do this. Then I'll wrap the other end.

The other thing I thought about was to querry another Volvo indy I know. He also has an Autodiagnos scanner. I'm curious if his will clear the above codes whereas the other indys would not. That was another puzzle....why couldn't the COMBI codes be cleared? That may be the problem right there. What does the Swedish BrainTrust think?

One other thing I noticed but failed to mention: This replacement ECC's backlights are orange/red instead of green, like my original one was. Odd that. Were the dash/radio/ECC lights in the 850's this color or were they green? Can't remember if I pulled this from an 850 or an S/V 70.
1998 V70 T5 226,808 miles. Original Owner.
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by misha »

All of them...850 & s,v,c,xc70 ...have green lightening.
That said....light bulbs are neutral...green colour/tint is between panel and bulbs.

And.....ecc unit is different between 850 and s,v,c,xc70.
'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
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by sleddriver »

Evidently not all of them as this one is orange/red. I understand it's not the bulbs. I pulled them to discover they had blue covers on them with brown overheated spots. So I removed them all. You can see photos posted above. The ECC I pulled looks exactly like the one it replaced.
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by misha »

I had never seen amber or blue illumination on ecc panel or switches on these cars.
Ac and rec buttons on 850 illuminates orange when they are switched or not...s,v,c,xc70series have green llluminations.
'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
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by sleddriver »

misha wrote:I had never seen amber or blue illumination on ecc panel or switches on these cars.
Sleddriver wrote:BTW, the ECC I pulled from the JY has ORANGE backlights instead of GREEN. Odd that. Even odder, is that as shown above the bulbs were covered in BLUE vinyl covers!! Removing those had increased the brightness.
001.JPG
001.JPG (106.76 KiB) Viewed 411 times
Volvo_ECC from junk yard 001.JPG
5/1 is the Combined Instrument Cluster (COMBI). The wire highlighted in RED is the voltage signal proportional to vehicle velocity. This wire is connected to the ECC as an input (C1 with arrow pointing to the right).
Volvo_ECC Schematic COMBI speed signal wiring.jpg
1998 V70 T5 226,808 miles. Original Owner.
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by misha »

Ok,i see....i'm just saying that i didn't seen anything but stock green illumination.
I've seen those little bulbs with vinyl covers available from Volvo and i wonder if they are an upgrade or from later models.
'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
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by abscate »

They stop,the little bulbs from multiplying while they are in the box.

I'm sorry about this, it's been a long day and I need to let the weirdness out....
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by sleddriver »

Re: Blue covers. Very odd that. Why change white incandescent light blue when the dash light is green or in my case orange?

I picked up a used one as a loan from indy.....it's Tango Uniform. Does exhibit the same vehicle speed dependent blower-speed though. But it's not able to change the dampers off of HOT nor direct the air direction. A/C light continuously flashes green.

Why do I get all the WEIRD STUFF? Probably too close to WEIRD Austin.......
1998 V70 T5 226,808 miles. Original Owner.
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by misha »

There is a possibility that you got ecc from '99 or '00.
They should be completely different inside and not interchangeable with pre '99 models.
'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
User avatar
sleddriver
Posts: 975
Joined: Thu Apr 08, 2010 6:06 pm
Year and Model: 1998 V70 T5
Location: Tx
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Re: 98 V70:Cabin Blower Speed Vehicle Speed Sensitive?

Post by sleddriver »

I don't think so...99's use CAN buss system. Plus don't they "serialize" all modules so that replacements have to be "initialized" before they'll work? Too bad the one indy grabbed was Tango Uniform......rats.
1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM
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