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Volvo 850 ECC Testing/faulty?

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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Navy
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Year and Model: 1994 850
Location: London UK
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Re: Volvo 850 ECC Testing/faulty?

Post by Navy »

20200314_190732.jpg
Many thanks again for replying.
Richard, my internet searches came up with the same Vishay Diode 1N4148WS. If I have no joy with Alps then that may be the route I take.
I have been trying to understand the workings of diodes and the in/out voltages/current are the important bits. Still, I would really like the specs from Alps.
Jreed, sorry I may have been unclear earlier. I managed to find some loose solder connectors on my ECC and once I reflowed the pins I started to get the correct voltages from the rear connector block A. The ECC service manual then pointed me towards the power stage which is where I found the burnt/corroded diode. So the A2 diode position D4 is actually inside the power stage.
Sorry for the misunderstanding and thank you for taking the time to photograph your ECC which incidently looks exactly like mine.
André
The diode is near the bottom of the pcb
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jreed
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Post by jreed »

Ah ha! Thanks for clarifying.
For what it's worth, I checked the boards inside the two spare power stages that I got from the junkyard, and they're slightly different than the one you pictured above. The version I have is marked ALPS ANJ97010J (revision 10J I guess) and yours is marked ANJ97011E (version 11E, presumably a more recent version). The layouts are different... for example, in the area near the electrolytic capacitors where you show a R25, D4 (the failed part), R26 and R29, the boards on mine are D5, R4, and R29.

My boards:
Screen Shot 2020-03-14 at 3.33.51 PM.png
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94
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RickHaleParker
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Post by RickHaleParker »

Volvo 850 Table of control modules and power units.pdf

Version 6, (D+ supply added) included a change in a under dash wiring harness.

You can find this in VIAD. Profile an 850. Then ↓↓↓
2020-03-14 (1).png
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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Navy
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Year and Model: 1994 850
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Post by Navy »

Thank you both for replying.
I haven't has any response from ALPS as of today but I live in hope.
Thank you jreed for the pictures. My pcb say ISSUE MO3 and I believe yours is ISSUE MO5, perhaps yours is the later version and mine earlier.
So, If I understand this correctly I can/cannot simply swap the power stage without it being a corresponding part to match the ECC?
RHP, where on do I obtain the VIDA?. The pdf on my computer is a blank screen.
I will try to open the pdf again on my work computer.
Many thanks again for replying
André
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misha
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Post by misha »

Because...when you try to download that "pdf" it magically becomes "php"...for some reason.
'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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RickHaleParker
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Post by RickHaleParker »

Navy wrote: ↑17 Mar 2020, 14:06 RHP, where on do I obtain the VIDA?. The pdf on my computer is a blank screen.
I will try to open the pdf again on my work computer.
The pdf loads correctly on my computers. Then again I uploaded it. Try left click then "save link as..." .

For VIDA go here and read at least pages 1, 6 & 16. The hyperlinks in the page 6 install instructions are dead. Use the magnet link on page 16 as instructed. You will need the 2099 patch on page #1.

List the Volvo part number on the ECC so that we can figure out what version it is and what power stages will work with it.
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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Navy
Posts: 67
Joined: 29 June 2008
Year and Model: 1994 850
Location: London UK
Been thanked: 1 time

Post by Navy »

Hello,
Sorry for the delay in replying..... but it seems here in London things are extremely volatile. Sadly, panic buying is the new thing.
Anyway, I have been hoping ALPs will e-mail me as it's almost two weeks and two e-mails, I may now draw a line under ALPS.
RHP. I have tried to get VIDA going but with no luck. In fairness, I have been overwhelmed with other things lately (see first line) but will try again when things settle down. In the interim, I shall take a pic of my ECC part numbers as suggested.

Once again sorry for the delay in responding.
André
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jreed
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Post by jreed »

Good luck... looking forward to helping out.
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94
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Navy
Posts: 67
Joined: 29 June 2008
Year and Model: 1994 850
Location: London UK
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Post by Navy »

Hello everyone, So sorry for the delay in replying but as you know there have been some lifestyle changes recently which I am adjusting to.
Finally, 1N4148W SMD swithching/general purpose diodes arrived in the post this week although I have had no time to focus on this.
I have had the time to take a pic of my ECC part number which I promised to do which is included.

Hopefully, I'll be able to try out the replacement diode.
Sorry for the delay replying and hope everyone is trying to keep safe.
Andre
p.s I have had no reply either way from ALPS.
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RickHaleParker
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Post by RickHaleParker »

Use any unit before line 6 would require rewiring. (1992 & 1993).

6 1994 week 01 D+ supply added (ºC) 9144255 / (ºF) 9144256.
7 1994 week 12, Right-hand drive, Suppression introduced, (ºC) 9134769 / (ºF) 9134770
8 1994 week 23, Left-hand drive, Suppression introduced, (ºC) 9134769 / (ºF) 9134770
9 1995 week 02, Diagnostic test mode (DTM) 2 removed (ºC) 9134819 / (ºF) 9134820
10 1995 week 38, Size change, front panel, (ºC) 9166549 / (ºF) 9166550

Pretty sure the only difference between Celsius and Fahrenheit units is the front panel.
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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