IPD sale XeMODeX - Experts in Volvo Electronics
Marking "Topic Solved" is functional again. It's the green check next to your post. BTW, please do use this when your question is answered and verified. Thanks!
MVS-Amazon link helps MVS!

Get email notification of topic replies. Log in or register (free). Amazon Link Buy anything with this and it helps MVS!

Ob2 port won't read codes, personal reader and store reader - 99 s70 na 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

User avatar
smacknab
Posts: 454
Joined: Wed Sep 25, 2019 4:23 pm
Year and Model: 99 s70 NA Manual
Location: Boston
Has thanked: 73 times
Been thanked: 21 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by smacknab »

abscate wrote: Sun Dec 29, 2019 8:59 pm Check the voltage from 16 to a chassis ground to see if pin 16 has battery voltage
Pin 16 to the frame near the driver's side door hinge read about 2 mV

I'll check the under dash fuses when it stops hailing, but thanks to everyone for chiming in. To be honest it's a little over my head at the moment but I'll check the fuses soon and report back what I find
99 s70 NA Manual - >225k miles
Mods: Accidental C70 Delta link, V70 Left Dog Leg
User avatar
abscate
MVS Moderator
Posts: 23770
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 443 times
Been thanked: 1339 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by abscate »

If I plug an OBD READERinto a 1999 am I reading on the K line or CAN BUS?

Will it depend on the protocol of the scanner, perhaps?
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
User avatar
smacknab
Posts: 454
Joined: Wed Sep 25, 2019 4:23 pm
Year and Model: 99 s70 NA Manual
Location: Boston
Has thanked: 73 times
Been thanked: 21 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by smacknab »

Someone suggested I check that it's plugged in, looks good to me.

Still waiting for dry weather to check the lower fuses
Attachments
IMG_20191230_123111.jpg
IMG_20191230_123107.jpg
IMG_20191230_123104.jpg
99 s70 NA Manual - >225k miles
Mods: Accidental C70 Delta link, V70 Left Dog Leg
jimmy57
Posts: 6673
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 4 times
Been thanked: 276 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by jimmy57 »

K line is what Generic readers use. K line is used by VIDA (and some others I suppose) to tell the CDM (inst cluster) to open the gateway and connect high speed CAN wires.
If the scan tool came on, display was on, but wouldn't communicate then K line issue is likely. If the tool did not come on then the pin 16 wire or ground is suspect.
User avatar
smacknab
Posts: 454
Joined: Wed Sep 25, 2019 4:23 pm
Year and Model: 99 s70 NA Manual
Location: Boston
Has thanked: 73 times
Been thanked: 21 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by smacknab »

jimmy57 wrote: Mon Dec 30, 2019 11:17 am K line is what Generic readers use. K line is used by VIDA (and some others I suppose) to tell the CDM (inst cluster) to open the gateway and connect high speed CAN wires.
If the scan tool came on, display was on, but wouldn't communicate then K line issue is likely. If the tool did not come on then the pin 16 wire or ground is suspect.
No display came on. I'm going to get some contact spray and try that. When you say ground, does that mean any ground in the car? I did just take the head off and reassemble the car, so possibly i missed a ground wire in the engine bay on reassembly?
99 s70 NA Manual - >225k miles
Mods: Accidental C70 Delta link, V70 Left Dog Leg
User avatar
abscate
MVS Moderator
Posts: 23770
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 443 times
Been thanked: 1339 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by abscate »

You’ve got no voltage on pin 16 on the OBD

Start tracing backwards from that pin to see where you lose the 12 volts

That’s the systematic approach
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
User avatar
RickHaleParker
Posts: 5072
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
Been thanked: 647 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na  Topic is solved

Post by RickHaleParker »

11A/6 & 11C/5 fuses under hood.

24/2A Connector Green 12-pin (male- female)
Engine compartment cable harness - Firewall cable harness

24/7B Connector Natural10-pin (male- female)
Firewall cable harness- Tunnel cable harness
EM2.png
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.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
User avatar
smacknab
Posts: 454
Joined: Wed Sep 25, 2019 4:23 pm
Year and Model: 99 s70 NA Manual
Location: Boston
Has thanked: 73 times
Been thanked: 21 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by smacknab »

Found it! Fuse 11c/5 was blown. Ob2 is scanning again. Thanks everyone for the hand holding, I didn't know that the fuses had different designations based on their location!
99 s70 NA Manual - >225k miles
Mods: Accidental C70 Delta link, V70 Left Dog Leg
User avatar
abscate
MVS Moderator
Posts: 23770
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 443 times
Been thanked: 1339 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by abscate »

Excellent. There is one weakness with the incredibly well-done Volvo wiring diagrams

Sometimes, you want to know everything that is on a circuit so you can figure out what is making the fuse blow.

1 You can famously RTFM and read the fuse systems in the manual (Volvo manuals are all online for free)

2 You can look at the back of the fuse and color/mechanically trace the wire

3 You can hunt through all the wiring diagrams and look for references to the (example above 11C/5) fuse designation.

SM - for the 11C/5 I think this circuit feeds:

Engine cooling fan
ECC climate control
MCC climate control
Diagnostics

so if it blows again, that's the list of things to check
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
User avatar
RickHaleParker
Posts: 5072
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
Been thanked: 647 times

Re: Ob2 port won't read codes, personal reader and store reader - 99 s70 na

Post by RickHaleParker »

11C/5
  • Engine cooling fan (FC)
    Diagnostics (OBD pin #16)
    Standard heater
    Manual climate control (MCC)
    Electronic climate control (ECC)
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.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Post Reply
  • Similar Topics
    Replies
    Views
    Last post