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7 votes

About heavy-duty vehicle diagnostic port

Isn't it a standard, so all vehicles are wired the same (for a given connector)? The following information comes from the Handbook of hardware schemes, cables layouts and connectors pinouts website. ...
Weather Vane's user avatar
  • 2,339
5 votes

Can a vehicle be harmed with bad inputs via an OBD-2 port?

Just this morning I connected an ELM327 to a '05 Volvo XC90. After only 1km, the message was displayed for "Anti-skid service required", and then "Anti-skid temporarily unavailable". I removed the ELM,...
Pete T.'s user avatar
  • 51
4 votes
Accepted

What Does HRT mean on Scanner Tool?

I was wondering whether this should have been HTR for an oxygen sensor heater. I then found this from here - It would fit that the O2 sensor and O2 heater both have red crosses against them.
HandyHowie's user avatar
  • 25.4k
4 votes

Sniffing the CANbus on an Audi A5

I don't see how this is different from your previous question. No data is actively sent to the OBD port on late VAG vehicles as this in connected to a gateway and only responds to PIDs and ...
Newbie Noob's user avatar
  • 2,781
4 votes
Accepted

Identifying faulty O2 sensor with scan tool

These sensors look normal. Bank 1 sensor 1 should cycle about twice per second, this is a bit slow but fast enough to maintain normal fuel control. It is common for Toyota to cycle the system a bit ...
Fred Wilson's user avatar
  • 11.6k
4 votes

1989 Chevy Scottsdale 2500 HD 5.7 liter 350

1989 is OBD1, my favorite scanner for this vintage GM product is a Snap-On MT2500, you can find them on eBay fairly reasonable. Be sure the scanner comes with the GM1 aldl adapter, a Primary cartridge ...
Moab's user avatar
  • 7,990
2 votes

Can a vehicle be harmed with bad inputs via an OBD-2 port?

I just had a problem using one of this OBD2 Bluethoot module on my Chevrolet Trax 2015, where my Traction Control System stop working (Engine and TCS dash lights came on), also the transmission wasn't ...
Anttony Crosbie's user avatar
2 votes

Can a vehicle be harmed with bad inputs via an OBD-2 port?

I recently purchased a 'ebay' obd2 dongle. Plugged it into my 06 Mercury mountaineer, to check a CEL code. I was using the Torque app. Drove with it for a few miles and the Wrench symbol came up ...
Ryan Roberts's user avatar
2 votes

ELM 327 How i can know a calculated CO CO2 HC & NOx with ELM OBDII? Is it possible?

No, it is not possible to get true values from OBD-II ELM327. You have to have a dedicated exhaust gas analyzer to figure that out, like this one: But you can estimate it using a lambda sensor ...
Zaid's user avatar
  • 39.2k
2 votes

Which is the Best Scan and Diagnostic tool for Asian Vehicles?

As long as we are talking about US spec "Asian" vehicles, my personal preference is one of the many "Autel" brand scan tools, which for me have always been able to link up and give good results. I ...
SteveRacer's user avatar
  • 12.4k
2 votes
Accepted

Are there any OBD scan tools compatible with a Volvo V50 2005 Europe

Depends on what you would like to do with it. If you just want to clear some generic codes and the check engine light, then most generic OBD2 cables should work with appropriate software. If you want ...
I have no idea what I'm doing's user avatar
2 votes

Getting VIN's of North American Vehicles

A VIN (Vehicle Identification Number) code is unique to each vehicle - it gives all the information such as which manufacturing plant right down to which radio and speakers were fitted etc. If the ...
Solar Mike's user avatar
  • 34.6k
2 votes

Car Scanner tool and output

It looks like your scanner is only showing you values from the journey in progress - it's showing 0.53km driven at a speed of 4.23km/h. I'd suggest driving it a bit more before worrying. I'd also ...
Nick C's user avatar
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2 votes
Accepted

Innova RepairSolutions (Mac) Stuck Updating Firmware (Code Reader 3120f)

TL;DR: Unplugging the device while the firmware update is happening, even if the update is frozen, may make the reader break. But the reader can then be fixed by plugging it into a computer that can ...
timeSmith's user avatar
  • 141
2 votes

Do fault codes get recorded and stored with a time stamp and date into a master log with a history of DTCs?

No. Most codes are volatile. There aren't any date stamps on anything, so if one pops up, you won't know when exactly it happens. Codes are meant as an indicator. Once the issue is no longer present, ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
1 vote

Erratic LTFT whilst driving

I'm not a fan of using fuel trim values to diagnose engine problems, there's a lot of rabbit holes there. The fluctuation of the long term trims is certainly an indicator something isn't right, it's ...
GdD's user avatar
  • 17k
1 vote

Is it possible to command an engine to run at a fixed RPM while in Park using a scan tool?

Another option is to buy a tool (about $40) that will attach to the steering wheel and hold down your accelerator pedal. This one screws in and out to set the length making it very easy to set to a ...
MJH's user avatar
  • 878
1 vote

Significance of 7E8

I am also just starting to dig into OBD2. I am electronics technician and auto technician. It seems that 7DF is the standard identifier for request messages. The response identifier can range from 7E8 ...
John Canon's user avatar
1 vote
Accepted

OBD-II Scanning Bluetooth | Are Fault Codes Encripted?

No, the codes are not encrypted. They do have a protocol which is used to decipher them, though. For instance, Honda uses the J2284 protocol and GM uses the J1850. There are a few others out there as ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
1 vote

Short term fuel trim shows -9% (Rich)

First off, in order to read fuel trim, add your long term and short term together. Your system seems like it has too little oxygen in the exhaust, causing the pcm to restrict fuel to the engine ...
Geary's user avatar
  • 49
1 vote

Short term fuel trim shows -9% (Rich)

Captain kenpachi def sounds correct. According to your fuel trims you have an unmetered vacuum leak and along with your confirmation of the sound that you are hearing. It sounds to me that you have a ...
Midnightrider's user avatar
1 vote

Car Scanner tool and output

First, if you want accurate fuel consumption values: Fill you tank completely, reset your odometer, drive for a few 100 kilometers, and then fill it again, noting how much gas you put in and how many ...
Daniel's user avatar
  • 1,072
1 vote

Are there any affordable OEM scan tool options for DIY-ers?

If it has to be 'cheap' you do not want any proprietary hardware and software. So what you need is a basic ($15) USB or bluetooth enabled OBD-II scanner that can hook up to a laptop. The other thing ...
MadMarky's user avatar
  • 1,350
1 vote

Heavy Truck OBD2 diffrent from Car OBD2?

There are readers and readers - some readers will read many cars, some have to be tailored to specific makes (such as the one I had to get for my car). The professional readers have "character" cards ...
Solar Mike's user avatar
  • 34.6k
1 vote

Classifying a DTC as active, past or potential

EDIT: I spent more time reading into this, the individual manufacturer of the vehicle has a lot of control over this. The OBD2 DTC has some standard items but is not required to have a time stamp or ...
finleyarcher's user avatar
1 vote
Accepted

Open source OBD II scanner hardware without ELM or STN

I couldn't find an open source scanner firmware, but we have solved the KWP issue that we were facing. Still open for any mention on open source OBD II scanners. I use the same GPIO pin as both GPIO ...
clamentjohn's user avatar
1 vote

Are there any OBD scan tools compatible with a Volvo V50 2005 Europe

From what I can tell, the 05 uses CAN protocal, not OBD2, and then there are some issues with using a generic tool, and most accepted, if not only official method, is to use a volvo-specific (...
user608804's user avatar
1 vote

1989 Chevy Scottsdale 2500 HD 5.7 liter 350

89 is OBD1 and requires specific connectors and a OBD1 scantool. You can jump pins A & B on the ALDL (Assembly Line Datalink Connector located under the driver side dash) to make the MIL flash out ...
Ben's user avatar
  • 10.7k

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