Mine is a 99 with a 4 cylinder engine. I've tried the on/off with the
key three times and that doesn't do anything. I can hold the odometer
button and turn on the key, and that definitely throws the thing into
its self test mode, but I never get an error code on the odometer. My
check engine light has been on since I got the truck and detailed
everything under the hood, but I never get an error code on the odometer
after the self test.
Is there some other trick that I'm missing?
david.clement@verizon.net wrote:
> I do not know what year your truck is but my 99 Dakota will display the
> diagnostic codes in the LED mileage display now and my 03 PT Cruiser spits them
> out every time you fire up the engine (being that there is no problems with the
> PT it just displays "none").
>
> Dave Clement
> 99 SLT+ CC 4x4
>
> In article <c951po$fuj$1@bent.twistedbits.net>,
> larryathey.nospam@larryathey.com (Larry L Athey) writes:
>
>>
>>I'll be honest, my only intention is to be able to listen to my pickup
>>on a plain RS232 (serial) basis on my laptop so I can see what's going
>>on with the diagnostic port. Once I get a grasp on it, I want to build a
>>small in-dash or under-dash device based on a PIC processor and a small
>>flourescent display that replaces the "check engine" idiot light with
>>something more comprehensive. Might sound complicated to someone who
>>isn't a programmer, but I do this kind of stuff on an almost daily
>>basis, so it's really not that major of an undertaking for me. I would
>>also end up making the schematic and the PIC processor source code
>>public for others who would like to do the same thing.
>>
>>Josh Battles wrote:
>>
>>
>>>"Larry L Athey" <larryathey.nospam@larryathey.com> wrote in message
>>>
>>>
>>>>Well $150 is a little more realistic...Where did you get the
>>>>cable/software from?
>>>>
>>>>I'm also curious as to where people actually find information regarding
>>>>the pin-outs of these ports and the specifications on the proprietary
>>>>protocol Chrysler uses.
>>>
>>>
>>>Some of the pin-out information might be in the FSM... As to
>
> specifications
>
>>>of the Chrysler PCM programming, that's pretty much a mystery. There are
>>>some companies that can reflash them, but usually everything is a pretty
>>>closely guarded secret.
>>>
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