Need return status info for Mod $19 (Req DTC)

[Keith@HPTuners]

Working on PCM_Edit... i'm getting this info back

6C F1 10 59 HI LO XX

What does the XX mean in the return info?

I have these returns, 49, 6B, and FF.

[Keith@HPTuners]

hmmm.. anyone have any read DTC info?

Mode $19 doesn't seem to be returning everything.

[ls1tools]

Look in section 5.8.1 of SAE J2190
Bit coded:
7. Warning lamp illuminated for this code
6. Warning lamp pending for this code, not illuminated but malfunction was detected .
5. Warning lamp was previously illuminated for this code, malfunction not currently detected, code not yet erased.
4. Stored trouble code - history freeze frame data exists.
3. Manufacturer specific state
2. Manufacturer specific state
1. Current code - present at time of request
0. Maturing/intermittent code - insufficient data to consider as a malfunction.

Regards
Paul

[ls1tools]

hmmm.. anyone have any read DTC info?

Mode $19 doesn't seem to be returning everything.

Request like this: (using V2 hardware)
16:40:13.943: Send: $01,$01,$41,$07,$6C,$10,$F1,$19,$D2,$FF,$00,$A1
16:40:13.973: Recv: $01,$01,$C1,$07,$6C,$F1,$10,$59,$00,$00,$FF,$8F

You probably forgot the $00 after the $FF in the request - hmmm?

The $D2 is the bit flags I am requesting - from the list above.
The $FF requests from all DTC types: P, C, B and U
The $00 is just a waste of space - I do not know what it is for.

You may get multiple resonses - for multiple DTC's
The last one will/should be $00,$00 and is the "end of list marker".

Regards
Paul

[Keith@HPTuners]

My req is:

transmission = Chr(&H6C) & Chr(&H10) & Chr(&HF1) & Chr(&H19) & Chr(&HD2) & Chr(&HFF) & Chr(&H0)

I cought on to the $00 $00 being the end of line so I filtered that out, but I did a DTC scan on a friends car with an OBVIOUS SES light on and reported nothing.

I'm going to switch to using mode 03 or 13 instead. The Elm documentation has a little description of how that mode works so I'll try to implement that in my next version of PCM_Edit.

Thanks.

Man, i really need these SAE docs. I'm probably gettign to be a pain constantly asking about what all these modes do and their formats.

[ls1tools]

Man, i really need these SAE docs. I'm probably gettign to be a pain constantly asking about what all these modes do and their formats.

Yes it is a good resource.
There are two versions of the HS3000:
The 1999 version which includes J2178 which contains a lot of necessary info, and the 2003 version which does not include J2178.
So you really need both - or get the 2003 version and purchase J2178 (parts 1-4) seperately.
I queried the SAE on why J2178 was not included in HS3000/2003. The best answer I got was that it has not changed since 1999 so did not need to be updated/included in the 2003 release.

Paul

[Keith@HPTuners]

Ok, I'll look into that. I have a 1993 version that is probably outdated.

[Keith@HPTuners]

What I noticed with the way GM Implemented mode $19 (I'm saying this instead of the J2190 because GM did not follow the book).... is that they do return the information about the dtc in the third byte. You just need to decode it.