PCM Hammer P12 development

[Gampy]

You are stating the obvious and known stuff, so no offense here.

[MudDuck514]

I have an opportunity to get some PCMs from my local salvage yard. Does anyone KNOW what years the P10 vs P12 usage was?
There are 2002, 2003 and 2007 Trailblazers.
Doesn't list any other vehicles with the 4.2l, nor any of the cars.

Mike

[darkman5001]

I have an opportunity to get some PCMs from my local salvage yard. Does anyone KNOW what years the P10 vs P12 usage was?
There are 2002, 2003 and 2007 Trailblazers.
Doesn't list any other vehicles with the 4.2l, nor any of the cars.

Mike

2002 and 2003 use the P10, and 2007 uses the P12.

[MudDuck514]

2002 and 2003 use the P10, and 2007 uses the P12.

Thanks. I wasn't sure about the 2007, but was pretty sure of the others being P10s.

I hope to go get the P12 on Sunday, along with its plugs.
May find another P05 and P11 just to have them as I already have the plugs for them.

Mike

[bojimmy35]

I might be able to get a p12 as soon as tomorrow for testing, don't have a vehicle to test it in but can power it on the bench and potentially make a good door stop out of it

[Gampy]

For those that are interested ...
This is the read of the failed (timed out??) erase.

It did the right sector, it looks completely done ...

[antus]

yep that looks good, and looks recoverable. if you continue forward and repeat the same calibration write until the kernel can successfully detect the end of the erase, you'll likely solve this issue, then we'll find out if the programming stage is going to work as is or need more development.

The A2 00 recovery is interesting because this would be an A2 01 (calibration) recovery in a P01/P59. So it appears it no longer makes a difference.

As we know the A2 00 provides a way in, your erasing the correct sector, so the only way is forward from here. We need to determine if the detection of the end of the erase failed because of timeout, because the chip responded differently, or some other bug.

[Cincinnatus]

Is the PCM stuck? You can read it and try to write it (it doesn't see the erase yet), but can it be powered down?

[darkman5001]

PCM has been powered down multiple times. Still alive.

[Gampy]

So, we have erasure ...

[10:33:34:055] Processing range 020000-03FFFF
[10:33:34:075] Erasing.
[10:33:34:092] TX: 6C 10 F0 3D 05 02 00 00
[10:33:34:110] RX: 6C F0 10 7D 05 00 00

But no write ...

[10:33:34:123] Writing...
[10:33:34:138] Sending payload with offset 0x0000, start address 0x020000, length 0x0400.
[10:33:34:211] TX: 6D 10 F0 36 00 04 00 02 00 00 ....... Wacked for brevity
[10:33:34:457] RX: 6D F0 10 7F 36 00 AA

Note the AA code.