Just tried to flash the new 4L80E cal's into my PCM and I get a 'cable unknown' message?
Any idea's???
Cable unknown???
Just tried to flash the new 4L80E cal's into my PCM and I get a 'cable unknown' message?
Any idea's???
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
Now says PCM is in an unknown state?
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
This is when I try and read the PCM
This is a screen shot of the attempted read???
Oh, and both the USB and the OBD LED's flash
Last edited by hquick; September 29th, 2007 at 11:53 PM.
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
Long shot, but is the PCM licensed to the cable already?
Yes, I've flashed this PCM quite a few times already. The truck has been out of action for around 2 months and this happened as soon as I tried to reconnect.
The cable unknown issue has been resolved...it recognizes the cable.
I still can't read, write to the PCM.
I can start the scanner and it will connect and log data...things like when I push the accel pedal, the data shows this.
So, all of the sensors are talking OK.
???
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
Your PCM is refusing to respond correctly to the "unlock PCM" command that FlashScan is sending it. FlashScan needs to unlock the GM security prior to reflashing or reading the PCM.
I don't know why the PCM is not ready, the only thing I can think of is to turn on the ignition, wait 30 seconds, then try reading the PCM.
If that fails, try ignition off and wait for 1 minute, then on and wait for 1 minute, then try reading the PCM.
That's a long shot it may not work, but its worth a try. It will only take five minutes of your time to try it out.
P.S. I emailed you directly as well.
Regards
Paul
Before asking for help, please read this.
Thanks Paul,
I'll give it a try this afternoon. I was hoping to be driving the Burb to Sydney on Thursday....doesn't look like it's going to happen.
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
Tried your suggestions Paul.
Also tried turning the key and the motor won't turn over at all.
Is that PCM related?
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
I'm pretty sure the PCM won't (can't) stop the engine from cranking.
I'm sure you've checked, but flat battery maybe (or dead starter or solenoid)?
Regards
Paul
Before asking for help, please read this.
Yeah...just to make sure, I had the battery on the charger all day.
At one stage I think I saw the message whilst trying to read 'no calibration in PCM to read' or some such.
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
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