Could there be something wrong with the computer? 1998 v70

[MrAl]

Hello there,

I checked another person's car today for OBD2 codes and i was quite astonished that the reader read the codes in less than 10 seconds. I thought i was going to have to wait to see the results, but when i looked down i could not believe it read the entire information already.

This leads me to believe there is and always has been something wrong with the computer in my 1998 v70. It has always taken about a minute and a half to read the codes in that car, whether there are trouble codes or no trouble codes.

Any idea why it takes so long for this car, and it is like this for your Volvos too?

Thanks for any info about this i am trying to get to the bottom of what this car is doing and why it is doing it.

[scot850]

What year was your friends car, and was it a Volvo?

Neil.

[V50M66]

What tool are you using to read your ‘98? My ‘98 takes about 5 mins to read every system with the 850 OBDII app and a cheapo Bluetooth reader

[jreed]

On my 1997 855, using an old Actron handheld OBD2 reader I bought used on eBay a long time ago, it takes about 2 minutes to read codes.

[MrAl]

What year was your friends car, and was it a Volvo?

Neil.

Hi Neil,

That car was 1998 Buick.

My reader is Actron CP9575 about $100 USD new.

[MrAl]

What tool are you using to read your ‘98? My ‘98 takes about 5 mins to read every system with the 850 OBDII app and a cheapo Bluetooth reader

Hi,

Using Actron CP9575 about $100 USD new.

[MrAl]

On my 1997 855, using an old Actron handheld OBD2 reader I bought used on eBay a long time ago, it takes about 2 minutes to read codes.

Hi,

Mine is also Actron, model CP9575 about $100 USD new.
Think that makes the difference?

[xanthefin]

Buick uses VPW J1850 and Volvos are mostly Slow init (30 sec per module init roughly max and min 2 seconds) ISO 9141-2 and that other one "McMess" which could be faster but ex. ELM327 cannot do it really and i havent met any other than VST using it.


Actron seems use Standard OBDII so you need on ELM327 if you just want replicate it something couple commands like 0100, 03 and 07 to receive Pxxx codes from one single unit which ever supports standard OBDII. Volvos its either ECM or TCM and rest units wont support Standard OBDII even that. Then you can add more commands get more data out of it if you want.


Each command takes 100ms have received message but varies per protocol and message length.


Now if want compare ex. 850 App uses when connecting directly each individual units and their own fault codes and other info it totals like hundred messages when doing multi unit Scan (363 commands as example in one log) and gives wait time on some messages to attempt to have successful init on some units which otherwise just would fail. Single unit Scan its way less commands and time but still. Plus need first setup ELM327 in correct settings make it all possible.



Summarum your V70 is fine.

[MrAl]

Buick uses VPW J1850 and Volvos are mostly Slow init (30 sec per module init roughly max and min 2 seconds) ISO 9141-2 and that other one "McMess" which could be faster but ex. ELM327 cannot do it really and i havent met any other than VST using it.


Actron seems use Standard OBDII so you need on ELM327 if you just want replicate it something couple commands like 0100, 03 and 07 to receive Pxxx codes from one single unit which ever supports standard OBDII. Volvos its either ECM or TCM and rest units wont support Standard OBDII even that. Then you can add more commands get more data out of it if you want.


Each command takes 100ms have received message but varies per protocol and message length.


Now if want compare ex. 850 App uses when connecting directly each individual units and their own fault codes and other info it totals like hundred messages when doing multi unit Scan (363 commands as example in one log) and gives wait time on some messages to attempt to have successful init on some units which otherwise just would fail. Single unit Scan its way less commands and time but still. Plus need first setup ELM327 in correct settings make it all possible.



Summarum your V70 is fine.

Hi,

Oh that's interesting, thanks for the info.

What do you think makes this car take so long to get the monitors ready then?
That's another big problem. The monitors take so long to go ready, and even after driving another 100 miles they still are not ready.
I had this problem some months ago too.

Thanks.

[scot850]

Abscate and others have posted the drive cycle the cars need to on to get the monitors to set. If he sees this or PM him and see if he knows where the link is.

Neil.