Uplander/montana/relay locked bcm

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kur4o
Posts: 981
Joined: Sun Apr 10, 2016 9:20 pm

Re: Uplander/montana/relay locked bcm

Post by kur4o »

3c 08 is some part number, I doubt it is mileage.

There is built in parser to convert logs to bin, I just want to make sure bcm response correctly, and than we need to find the full address space, where is data to be read.
converting 3c dumps to bin is also useless, because they use different formatting, address and length per each 3c request.
On DTC tab query modules will also get you a list of all 3c.

[08:55:03.215] 6C 40 F0 35 00
this command seems uncomplete. it needs address and length to read. currently there is only 1 byte. Length is fixed to 0010 and address is 3 bytes long

6C 40 F0 35 [00 10=length][00 00 00=address]
04colyZQ8
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Re: Uplander/montana/relay locked bcm

Post by 04colyZQ8 »

Tried changing the length of 35… always gives neg response code 11.

So it seems time to j tag it.

But before i do that I want to try changing the vin does a nice person have an unlock, and write vin script for patcher master? I’d try changing the vin to all ffs I guess, not sure what they are new? I think dps displays it as a y with sideways semi’s colon over the y when it has a new vin? Idk what hex value that is?
kur4o
Posts: 981
Joined: Sun Apr 10, 2016 9:20 pm

Re: Uplander/montana/relay locked bcm

Post by kur4o »

That will be easy but it may reject it unless mec is >0
04colyZQ8
Posts: 389
Joined: Thu Jan 16, 2014 12:41 pm
cars: 2004 Colorado 4.8L swap
86/90 Jimmy 6.5L diesel swap
80 Chevrolet Silverado TBI swap
88dodge W100 LPG conversion

Re: Uplander/montana/relay locked bcm

Post by 04colyZQ8 »

Unlocked to change vin or it wouldn’t work. Vin is ff ff as new!! Changed sdm part number to ff ff.

Mec is A0, cannot change even if unlocked:(

Tried tech 2 with blank vin says no communication.. ok through pcm and tcm on bus. Try again says controller is locked.

Likely looking at mec.

Unfortunately it cannot easily be changed unless I guess I j tag it.
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