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12-16-2012, 04:29 PM
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Hummer Veteran
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Join Date: Nov 2008
Posts: 143
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Re: No start.
No, eBay seller, "ECM programers" had a feedback of 100% couple thousand sales.
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12-16-2012, 08:44 PM
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Hummer Authority
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Join Date: Sep 2003
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Re: No start.
so did they preprogram it for you with your vin#? If not you need it programmed. If they did you still need to do a theft learn follow this procedure.
1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON, vehicle will not start.
3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
4. Turn OFF the ignition, and wait 5 seconds.
5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes, the vehicle is now ready to relearn the Passlock? Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.
Important: The vehicle learns the Passlock? Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
6. Start the engine. The vehicle has now learned the Passlock? Sensor Data Code and/or password.
7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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12-17-2012, 04:29 AM
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Hummer Veteran
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Re: No start.
Tried this procedure two times, no change.
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12-17-2012, 04:33 AM
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Re: No start.
Passlock light doesn't go off after 10 min during the procedure, waited to 15m and it still wouldn't go off so second time i did this.
insert key and try to start the vehicle. do not turn the key off, let it sit in the "ON" position for 12 minutes
turn key OFF and remove key, wait 5 to 10 secs, and put key back in and just turn to the ON position ( dont try to start)
do this a total of 3 times.
start- on wait 12 mins- off remove key- on wait 12 mins- off remove key- on wait 12 mins- off remove key and start H2 up normally.
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12-17-2012, 05:18 AM
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Join Date: Sep 2003
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Re: No start.
Try original procedure but dont try to start at any time, just turn on and wait for light to quit flashing, im assuming its flashing? do that 3 times and see what happens
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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12-17-2012, 05:20 AM
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Re: No start.
You never said if they programmed to your vin#? Needs to be done before theft learn
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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12-17-2012, 06:33 AM
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Hummer Veteran
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Join Date: Nov 2008
Posts: 143
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Re: No start.
Yes, It's been programed to my vin#.
PassLock light comes on exactly 1 minute after turning the key and stays constant on (not flashing) for 15min+ after whitch I switched rutines because the light wouldn't go off and the other routine doesn't call for the light to go off.
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12-17-2012, 08:15 PM
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Re: No start.
Well im stumped. Wish I was there with my tech 2 would be much easier to get to the bottom of it. Ill look for more info for ya
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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12-17-2012, 08:39 PM
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Re: No start.
Thank you, you helped regardless.
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12-17-2012, 09:19 PM
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Re: No start.
Ok an update, I decided to start over and found PCMB fuse is blown now. Replaced it and the truck cranks now, but no start. OBD2 communicates, no codes. PCM1 fuse gets 0v in all key positions, there is no fuel pressure and fuel gauge is not working...
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12-17-2012, 09:22 PM
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Re: No start.
I'll try the passlock procedure again. Fingers crossed!!!
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12-18-2012, 01:45 AM
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Re: No start.
Well passlock procedure didn't work. But i got it running.. Kind off.
I jumped PCM1 fuse to the battery and it started! And stayed running till i puled the jump.
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12-18-2012, 01:49 AM
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Re: No start.
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12-18-2012, 01:54 AM
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Re: No start.
Technically.... If i jump the Pcm1 fuse to the ignition relay that should work...
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12-18-2012, 03:54 AM
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Re: No start.
Is that jumper wire in the picture for the drl lights mod to come on with headlights? I ask cause any blue wires from underhood fuse block are lighting circuits. Could have caused damage to bus bar in fuse block. If you jump the pcm 1 circuit it should work but could put too much draw on that circuit causing more damage
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
Last edited by HUMTECH : 12-18-2012 at 04:36 AM.
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12-18-2012, 06:14 AM
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Re: No start.
Quote:
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Originally Posted by HUMTECH
Is that jumper wire in the picture for the drl lights mod to come on with headlights? I ask cause any blue wires from underhood fuse block are lighting circuits. Could have caused damage to bus bar in fuse block. If you jump the pcm 1 circuit it should work but could put too much draw on that circuit causing more damage
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Yes i did this last week while the truck was down
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12-18-2012, 06:17 AM
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Re: No start.
Come to think of it the truck was going trough it's usual clicks and noises routine before cranking after the breakdown till I did that drl mode.... I only noticed it missing after i jumped pcm1 end heard that sweet music again ushering life in to the engine,lol
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12-18-2012, 06:18 AM
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Re: No start.
 Did I fry the fuse box?
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12-18-2012, 06:33 AM
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Re: No start.
Might have caused an open circuit to the pcm 1 fuse. When i have time tomorrow ill get the connector end views so you can test it
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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12-18-2012, 06:41 AM
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Hummer Veteran
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Join Date: Nov 2008
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Re: No start.
Thanks a bunch!
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