checksum failure
 

I just recieved my gryphon yesterday and hooked it up. I tried loading the 93 performance tune. It went through some steps then at the end it said checksum failed and had my hex code. After this the truck would not start.I unplugged it and it started and ran fine. I tried all three tunes with the same results. Any ideas? Am I doing something wrong?

Anthony

Did you update it on pegasus before it went in the truck?
Or did you plug it in right out of the box?

Key on in run position but motor not running.

I'll see if the mad doctor or groovy chick can help. Maybe Jack knows something about this.

Lars

Plugged it in straight out of the box. I'll try to update it and try it again.

turned key on set it to 93 performance key off key on started to load. check sum failure tried to start and nothing message poped up on odometer CHECK GUAGES

I pm'd Jack and Bill already. Just wanted to see if anyone else had this problem and knew how to fix it.

Anthony

Well it should be updated if you just bought this...unless it was used. Because I am pretty sure they said they update them with the latest firmware before shipping out.

Now to the part in bold....did you make sure to turn your key to the on position(without truck running) before you plugged the gryphon up to the cable?...And I found that the check gauges happens everytime I go to program my truck especially if it has done been cranked...something about the programming overiding the sensors at the time?? I think that was the explanation.

Yes the key was in the on position without truck running. The first time I tried it the truck had been sitting for about 9 hours. Also tried right after driving with same results.

Tell you what. Run the truck for 5-10 minutes with nothing on(no lights or accessories). Wait 5 minutes. Try going through the steps again. You might be having a voltage issue. Even try it with the door closed.

Hope this helps.

Lars

http://dygytalworld.ehost-services13...ecksum+failure

I do remember seeing this awhile back...I dont know that it has anything to do with you case, but I figured I would post it up.

Good one! JWBFX4
I will have to file that one!

Better start to contact Bill!

Lars

Yea I believe this one, might be up to Bill.

Hope you get up and running with it soon though

hmm hopefully thats the case. Thanks JWBFX4.