PCM write problems, cabling ?
-
antus
- Site Admin
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Datsun 1200 Ute
Subaru Blitzen '06 EZ30 4th gen, 3.0R Spec B
Subaru WRX 2007
Re: PCM write problems, cabling ?
most definately noisy power from the alternator or regulator. the noise on the vpw bus is enough for the interface to think another message is being transmitted when it isnt.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
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joukoy
- Posts: 405
- Joined: Mon Dec 16, 2019 5:27 pm
- cars: --
Re: PCM write problems, cabling ?
- Moved OBD2 gnd from dash to engine, problem continues
- Moved OBD2 +12v source from dash to distribution point under hood, problem continues
- Added new signal wire from pcm to OBD2 using different route, problem continues
Then:
- Original signal wire back, new wire from pcm blue pin 60 to OBD2 pin5 (signal ground): Fixed!
Or maybe it works few times and break again, let's see...
- Moved OBD2 +12v source from dash to distribution point under hood, problem continues
- Added new signal wire from pcm to OBD2 using different route, problem continues
Then:
- Original signal wire back, new wire from pcm blue pin 60 to OBD2 pin5 (signal ground): Fixed!
Or maybe it works few times and break again, let's see...