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ScanTool.net Forum  |  Software  |  ScanTool.net Software  |  Topic: BUS INIT: FB ERROR « previous next »
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Trey
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« on: March 15, 2003, 07:21:25 AM »

Just finished building an ELM323 ISO interface and can't get it to work.

When plug into OBD port green LED comes on and others flash in a sequence.  ELM323 v1.1 appears on Hyperterminal screen.

atz gives ELM323 v1.1
0100 gives BUS INIT:  FB ERROR
0101 gives BUS INIT:  FB ERROR

Tried on a '96 Chrysler T&C and a 96' Volvo 850, both OBDII compliant.

I will go back and verify cable pin outs again.

Any help appreciated.

I read another post from scoobieguy that stated t1 and t2 had to be exact 2N3904.  ELM schematic says 3904 or similiar.  I couldn't find any 3904 and used some that are supposed to be identical.  Should I go searching for the 3904's or is that not likely my problem?  The ones they sold me say FPN 5910.  Thanks.
« Last Edit: March 15, 2003, 09:18:54 AM by Trey » Logged
Trey
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Posts: 19


My motto here...


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« Reply #1 on: March 15, 2003, 04:02:15 PM »

Got it working okay now!!   Smiley

Did some research and seems the transistors I got for the 2N3904's were incorrect.  They were PNP and not NPN.  So went to Radio Shack and found some "real" 2N3904.  Replaced T1 & T2 and now works just like it should on both Volvo and Chrysler.

 Grin  Yeah!!   Grin

Only thing is I hacked my PCB trying to unsolder transistors.  Had to solder in some wires to make new connections.  It's not pretty, but it works!  It's inside a box so no one will ever know anyway.....
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