</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by cadyman:
<strong>when programming the pcm you must install battery charger on low or medium power on battery. due to the fact that with the key on and the data downloading if the battery volts drops below 12.0 volts it will lock the pcm up. you must get a new one from the dealer. i know this due to the face may dumb techs at the dealer i work at do this all the time. if it happens you can try to remove the positive cable from the battery and touch it to the negative cable some times this unlocks the pcm</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I thought that the instructions specifically stated not to do what you have mentioned. I did consider doing this when I get my tuner back. Any others have input on this?? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Maxmumboom:
<strong>Valve god is the way to go, i was happy with his service, and my pcm was shipped the day i ordered it. I nuked a pcm from piggybacking my hypercrap and my supershits programmer. not only did that fry my pcm, it locked both programmers. I had to send back the supershits and they sent a new one. good luck.
J</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">hypercrap <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> and supershits! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> That is too funny. True very true and seriously funny <img border="0" alt="[jester]" title="" src="graemlins/gr_jest.gif" />

ben

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Stove:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by cadyman:
<strong>when programming the pcm you must install battery charger on low or medium power on battery. due to the fact that with the key on and the data downloading if the battery volts drops below 12.0 volts it will lock the pcm up. you must get a new one from the dealer. i know this due to the face may dumb techs at the dealer i work at do this all the time. if it happens you can try to remove the positive cable from the battery and touch it to the negative cable some times this unlocks the pcm</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I thought that the instructions specifically stated not to do what you have mentioned. I did consider doing this when I get my tuner back. Any others have input on this?? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Don't hook up a battery charger while you are programming. You're more likely to get a spike that will fry the pcm.

 

I have just experienced the exact situation as Stove. <img border="0" alt="[Banging Head]" title="" src="graemlins/gr_banghead.gif" />

Here are my details.

I have a 2002 Chevy Avalanche with a 5.3L engine.

I just tried my tuner today for the second time. The first time it went fine without a problem but I reset the truck back to stock yesterday because I thought I was going to be getting different size tires. I just received the tuner on Wednesday.

I attempted to program my Avalanche today with disastrous results.
I followed the instructions on the sheet.
First I pressed "A" and removed the speed limiter. Then I made Tire Size corrections for my 35" tires. After that the screen returned to the main menu. I then pressed yes and proceeded to let the tuner enter the programmining cycle.
The first screen stated that it was storing my vehicles stock settings. That took about 3 minutes. After that, the screen said that it was beginning to program the new settings. Only one star came up on the current process screen when the unit beeped 3 times and said that there is no response from PCM and to check that the ignition was on and to check the cable. Nothing had moved jarred or switch on or off prior to this. I frantically tried to make sure that the plug was seated in the Data Link Connector and the other end securely attached to the tuner. I tried pressing different buttons on the tuner to see if that would change the screen which it did not.

At this time I had no choice but to unplug the unit and re plug it back in. I went through the programming mode again and this time it just said that there was no response from the PCM.

I turned the ignition off and removed the cable. Now, the vehicle will not start.. The starter cranks but the truck will not run. <img border="0" alt="[bullshit]" title="" src="graemlins/gr_bs.gif" />

I tried the procedure 3 more times and even disconnected the battery for 20 minutes in hopes that the PCM would reset. Nothing changed.. I had to leave my truck parked on the street and get a ride home.

I will say that I also followed the instructions step by step. I have Onstar and nowhere in the instructions does it mention anything about Onstar. I am positive that this is not a case of operator error.

Since it is the weekend, I can't get a hold of anyone at Superchips. <img border="0" alt="[bullshit]" title="" src="graemlins/gr_bs.gif" />

I am pretty confident that I will need to have the truck towed to the dealer. I will not mention anything about using a programmer.

If this is a problem that is encountered using Superchips Max Micro Tuners then I will most likely be returning it for a refund. <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

 

Man I am glad I got the Hypertech after hearing about all these people having trouble with "Supershits" locking up their PCM's. I have used mine about 15 times now with no trouble at all. You guys should tell Superchips to pay for the damages.

 

ONSTAR seems to be the problem in all these cases. Dunno about Supershits, but my Hypercrap has detailed instructions how to temporarily disable the ONSTAR by pulling the right fuses. It states that when the ignisiton is on, ONSTAR periodically communicates with the PCM and that interrrupts the programming process. I had no problems to program my PCM after disconnecting ONSTAR in my Sub. Also, the HPP instructions state NOT to have a charger installed when programming. Just start with a fully charged battery and turn the DRLs off by pushing the interior light switch three to four times.

 

I've good luck with my Hypertech too. Only gave me trouble one time. The truck had been sitting for a few hours and when I went to program, the hypertech said something about not enough power to run the unit. I thought I was screwed. I turned off the ignition and unplugged the programmer. Then I started the truck and it ran fine. Now whenever I plan on doing a reprogram, I run the truck for awhile so that the battery is at full charge. Haven't had a problem since.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by XRover:
<strong>The first screen stated that it was storing my vehicles stock settings. That took about 3 minutes. After that, the screen said that it was beginning to program the new settings. Only one star came up on the current process screen when the unit beeped 3 times and said that there is no response from PCM and to check that the ignition was on and to check the cable. Nothing had moved jarred or switch on or off prior to this. I frantically tried to make sure that the plug was seated in the Data Link Connector and the other end securely attached to the tuner. I tried pressing different buttons on the tuner to see if that would change the screen which it did not.

At this time I had no choice but to unplug the unit and re plug it back in. I went through the programming mode again and this time it just said that there was no response from the PCM.

(</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One more thing to add. If the cigarette lighter fuse is blown, then the datalink will not work. I don't know if this happened during any of these programming processes or not though. The datalink's fuse is the cig. lighter fuse.

 

ive seen this happen alot, even with the tech2 if it doesnt see the right voltage or skips a beat per say
say good bye to your pcm and canot be reprogrammed because there is no communictions at the datalink port anymore

 

Hypothetical situation, lets say you hate the way your PCM is functioning, dealer uploaded a new program that you hate. How do you disable the PCM so they have to install another one? Without being to malicious. How can you make it so they can not communicate with the PCM anymore and are forcd to replace it? I do not have the HPP3 or any other device. Just wires.