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Hello Keith, sorry I had a very busy weeks.

I finally cleared the codes with a friend scantool.



Keith, it is possible to reprogram the Fan low temp on my Grand Am '99 3.4L V6 using only...

There is the problem, sending mode $04 does not clear my BCM codes, only PCM.

When get trouble codes again, the BCM codes are there, the same ones without start the vehicle.

But as I know mode $04 is Functional, so how I will address BCM (mine is $40)...?

Should I use service $14 ?

$14 $80 $00

BTW, wich wil be the command to clear BCM trouble codes...?
BCM is class2 OBDII J1850vpw

I have tried service $04 but it only clears the PCM codes.

My BCm has some trouble codes due to...

F.0 is configured as digital input.

Take a look at the code :)

is a rar file, remove the .bin extension.


I'm learning OBDII. I have the project uploaded to:...

Tnx!

I had no time to build the complete input/output conditioner but as preliminary input used just a voltage divisor, as I only listen to the bus.


J1850-------/\/\/\/------- 2560 PINF.0...

I finally make the idea to work. I have coded a simple routine to listen the J1850VPW bus. I'm used the Atmega2560 module and after some tweak in the timings it works nice.

I tested it with a...

Thanks for get my question,

car is a Grand Am 1999 3.4L

It has a LS1 ECM I guess.

I spent this night reading again over this post and I'm now understand more the 3 byte header format. I...

hmm.. don't know. I just "spy" the bus, still hav't interact with. this packet loks to repeat every certain time.

I think I need to study a bit more :P

Hello !!


I'm new to the forum. I have been reading all the post, and I'm really interested into build a J1850VPW on-board lcd for my car. I get this idea on my head for about 3 years but I just...