pcmhacking.net

Posted: **Fri May 27, 2022 12:33 am**

I've been using PCM Logger for testing of my new custom OS and I've found some issues.

I'm going to try and document the issues that I've had so that they can possibly be reproduced and resolved.

Logging Halted Issue:
I've been able to reproduce this error multiple times.

Open PCM Logger
Connect Device to PC (VX Nano in my case)
Select Device
Select Parameters Tab
Error "Logging Halted" in Display Area
Selecting a parameter to log does nothing

Debug Log:

Code: Select all

[10:26:43:880]  PCM Logger
[10:26:43:880]  Thursday, May 26 2022 @10:26:43:88
[10:26:43:880]  Initializing J2534 Device
[10:26:43:880]  Loaded DLL
[10:26:44:495]  Connected to the device.
[10:26:44:526]  Battery Voltage is: 12.753
[10:26:44:682]  Protocol Set
[10:26:44:698]  Device initialization complete.
[10:26:44:698]  ValidDeviceSelectedAsync started.
[10:26:44:698]  TX: 6C 10 F0 3C 0A
[10:26:44:917]  RX: 6C F0 10 7C 0A 04 88 20 33
[10:26:44:948]  ValidDeviceSelectedAsync ended.

Error:

: Logging Halted.PNG (24.29 KiB) Viewed 3081 times

Posted: **Fri May 27, 2022 12:52 am**

PID Boolean Profile Issue:
I've been able to reproduce this error multiple times.

Connect Device to PC, Open PCM Logger, Select Device
Select Profiles Tab and Open Basics Profile
Open Parameters Tab and add Boolean Parameters "Cold Startup" & "Loop Status" (Both are from PID 1105)
Open Profiles Tab and Save As new profile
Close PCM Logger and re-open
Select Parameters Tab and now 2 "Cold Startup" Parameters are listed

Before Closing PCM Logger:

: PID Boolean Issue Before Closing.PNG (36.26 KiB) Viewed 3078 times

After Closing and Reopening:

: PID Boolean Issue After Close & Reopen.PNG (30.64 KiB) Viewed 3078 times

Posted: **Sat May 28, 2022 1:42 pm**

Thanks for reporting these. I'll look into it.

Posted: **Sun Nov 27, 2022 11:45 am**

I'm starting to address the computer side of my swap and I get the 'Logging Halted' error quite frequently. OBDX VT.

Posted: **Mon Nov 28, 2022 10:30 pm**

Broke4speed wrote:I'm starting to address the computer side of my swap and I get the 'Logging Halted' error quite frequently. OBDX VT.

Can you post in the debug log so we can see a bit more? Hopefully it gives a bit more details why its saying logging halted.

Posted: **Tue Nov 29, 2022 12:01 am**

Will do, sorry for not thinking about that first. I'll go out today and get some data.

Posted: **Sat Dec 03, 2022 12:27 pm**

...and of course I'm unable to replicate the error. I'll post up a debug log when I'm able to get one.

Posted: **Sat Dec 03, 2022 11:46 pm**

Has anyone found the pid for fuel flow? I’m almost certain it’s FC1C but but I can’t figure out an equation. I know it exists because my Snap-on tool has it and the snap-on doc says the PCM gets the data from the PIM. Looking at a graph of a log of both FCIC and fuel flow from OBDFusion are almost identical too. But they also are extremely close to all the MAF PIDs. Unless I’m completely wrong and this PID is just another MAF PID. And the other possible PID’s that also look similar are FC2C and FC43 but these 2 PIDs are actually the opposite when comparing the data on a graph. Thanks. And also thank you for all the hard work that you guys have done and continue to do, I really appreciate it

Posted: **Sun Dec 04, 2022 12:28 am**

fc1c is maf related
fc43 is map related
fc2c is fuel related, but don`t have exact meaning

Posted: **Sun Dec 04, 2022 9:01 am**

It should be on SAE J1979 pid 5E from https://en.wikipedia.org/wiki/OBD-II_PIDs
I've also got GM pid 163A, 2 bytes, with N=(E+512)*65535/1024
The J1959 pid would be the better one to use as any vehicle that supports fuel rate should provide it with the same equasion.

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