Just to update & find out if it's common, I did a flash today & just changed 3 bytes & of course it had the wrong check sum, but could wait an eternity & re-connected no worries, but after I flashed it in the first time it fired up it ran at 1500 rpm for 1 minute then I tried tapping throttle & changed gears(auto) & no goo so took it for a drive around 2 minutes & after putting it back to park or neutral it then idled at 2000!
I thought bugger but persisted & cranked & started & let run for around 10 seconds 3 times & on the 3rd attempt it finally just went back to normal idle position!
Have others experienced this?
I also tried just making these changes to the exact same tune DMTY $BD on another pcm & just swapped the pcm's & it started & ran initially but then wouldn't crank/fire again & I did an AA06 for the check sum when I made the 3 changes but guessing I must have to do something else if I wanted to use the same tune/pcm even if out of a different vehicle but thought if I A06 the check sum it would by-pass it?
VX VY PCM bin swapping = brick ahhhh :(
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VX L67 Getrag
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VL400
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Re: VX VY PCM bin swapping = brick ahhhh :(
AA06 for the checksum will just mean it will get a CEL from a bad checksum, need to change the device ID to AA to bypass it.
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VX L67 Getrag
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Re: VX VY PCM bin swapping = brick ahhhh :(
sorry I just worded what I did wrong!
attached is the file I flashed in & thought with AA06 the ID would be able to swap the pcm & would just disable the security?
Has anyone else flashed in he exact tune with minor differences & had the high idle for next few start up's?
attached is the file I flashed in & thought with AA06 the ID would be able to swap the pcm & would just disable the security?
Has anyone else flashed in he exact tune with minor differences & had the high idle for next few start up's?
- Attachments
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- new 5005 aa checksum & add trans shift change pressure.bin
- (128 KiB) Downloaded 241 times
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VL400
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Re: VX VY PCM bin swapping = brick ahhhh :(
It might have been that the PCM did not reset properly after the flash process and had what it would see as corrupt RAM - the flash bootloader runs from RAM so overwrites lots the PCM items such as idle IAC learning. The last step of the process is to erase it all, then force a PCM reset afterwhich the PCM should detect a RAM checksum issue and initialise it all as default values - maybe the default IAC steps caused the idle to be really high until it learnt the correct value again? If it happens again get a log and see whats going on 