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LED code reader/ECC help

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

Peevarino
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Peevarino

LED code reader/ECC help

Post by Peevarino » Sat May 04, 2019 7:30 am

Built a little code reader for sorting out my no heat issue, but the LED just stays on, no blinks when switched on.

It’s a 12v, and there’s a resistor, when my switch is turned off it’s off when plugged into the correct spots on the OBD output.

Ideas? Needs a different resistor?

I don’t need the heater yet, but it’s humid in Louisiana, and it would be nice to have defrost in the morning


09 XC70 3.2
97 855R

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jreed
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jreed

Re: LED code reader/ECC help

Post by jreed » Sun May 05, 2019 6:00 am

Sorry to hear you're having trouble getting the codes to read. What is the resistance value of resistor you're using? Which pins are you plugging the code reader into?
I got good results with the circuit shown below, plugging the switch between pins 5 (GND) and 6 (ECC) and the positive side of the LED into pin 16 (+12V). I used a 5K Ohm resistor in line with the LED to prevent overcurrent thru the LED.
https://www.matthewsvolvosite.com/forum ... 3&start=13
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Peevarino


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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Re: LED code reader/ECC help

Post by RickHaleParker » Sun May 05, 2019 6:24 am

The led flash code readers are for Fenix 5.2, Bosch LH 3.2 Jetronic & Motronic 4.3.
They don't work on Motronic 4.4 or Motronic 7.0.
Your 2009 has Motronic 7.0.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

Peevarino
Posts: 27
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Peevarino

Re: LED code reader/ECC help

Post by Peevarino » Sun May 05, 2019 8:06 am

jreed wrote:
Sun May 05, 2019 6:00 am
Sorry to hear you're having trouble getting the codes to read. What is the resistance value of resistor you're using? Which pins are you plugging the code reader into?
I got good results with the circuit shown below, plugging the switch between pins 5 (GND) and 6 (ECC) and the positive side of the LED into pin 16 (+12V). I used a 5K Ohm resistor in line with the LED to prevent overcurrent thru the LED.
https://www.matthewsvolvosite.com/forum ... 3&start=13
Unsure, it’s got heat shrink over it, but I’m pretty sure that’s the issue. It’s a 12v rated led, assumed (poorly) it would work fine.

Those are exactly the pins I was using.

I posted in here because it’s for a 97 850, not the 09 I have listed in my profile.


09 XC70 3.2
97 855R

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RickHaleParker
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Re: LED code reader/ECC help

Post by RickHaleParker » Sun May 05, 2019 4:41 pm

Peevarino wrote:
Sun May 05, 2019 8:06 am
I posted in here because it’s for a 97 850, not the 09 I have listed in my profile.
Motronic 4.4 started showing up in some '96 850s.
"97 is pretty much the year they moved to Motronic 4.4.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

Peevarino
Posts: 27
Joined: Tue Aug 30, 2016 7:18 pm
Year and Model: 2009 XC70, 97 855R
Location: Louisiana
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Peevarino

Re: LED code reader/ECC help

Post by Peevarino » Sun May 05, 2019 5:51 pm

Really? I had read multiple places that the R was still 4.3 in 97. It made no sense considering other 97s were 4.4


09 XC70 3.2
97 855R

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RickHaleParker
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Re: LED code reader/ECC help

Post by RickHaleParker » Sun May 05, 2019 6:14 pm

Peevarino wrote:
Sun May 05, 2019 5:51 pm
Really? I had read multiple places that the R was still 4.3 in 97. It made no sense considering other 97s were 4.4
Pull the cover off the ECM box and get the number off the ECM, the number you are looking for is in the format "0 261 20X XXX" .


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

Peevarino
Posts: 27
Joined: Tue Aug 30, 2016 7:18 pm
Year and Model: 2009 XC70, 97 855R
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Has thanked: 9 times
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Peevarino

Re: LED code reader/ECC help

Post by Peevarino » Sun May 05, 2019 8:12 pm

I will tomorrow, only number I remember from it is 628


09 XC70 3.2
97 855R

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jreed
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jreed

Re: LED code reader/ECC help

Post by jreed » Mon May 06, 2019 5:09 am

For what it's worth, the LED code reader works OK on the ECC in this car.
I'm not sure if I've got Motronic 4.3 or 4.4. I think it might be a 4.3.
I've got a '97 855 GLT wagon and the ECU is a 0261203936.


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

Peevarino
Posts: 27
Joined: Tue Aug 30, 2016 7:18 pm
Year and Model: 2009 XC70, 97 855R
Location: Louisiana
Has thanked: 9 times
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Peevarino

Re: LED code reader/ECC help

Post by Peevarino » Mon May 06, 2019 6:03 am

It’s 9 261 203 628

ETA it’s probably a 0 not a 9


09 XC70 3.2
97 855R

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