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Ken Craig
New Member

1 Posts

Posted - 07/17/2019 :  07:28:21 AM  Show Profile  Visit Ken  Craig's Homepage  Reply with Quote
Dtc 1222
spn 597
fmi 2
brake switched
what brake switched they talkng about

eddo
Advanced Member

USA
311 Posts

Posted - 07/17/2019 :  09:01:12 AM  Show Profile  Reply with Quote
telling us what vehicle you are working on would go a long way towards you getting accurate info. :)

Year?
Make?
Model?
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slippert
Top Member

USA
630 Posts

Posted - 07/18/2019 :  11:25:01 AM  Show Profile  Click to see slippert's MSN Messenger address  Reply with Quote
597
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2
0
Hyd or Air n/4091 - 1600 Air w/4091 - 4004 Bus - 1602/33
Brake switch inputs do not match

Occurs if the comparison of the inputs indicates a mismatch in the analog and digital signals.

Occurs if there is a high resistance in the wire harness, defective brake switch or a defective Electronic System Controller (ESC).

I am quite sure I see that code pretty much every time I plug in laptop, never active, has yet to cause an issue... clear it, drive bus chances are it comes back right after first key on.... My dealer rep said it was an com issue and could be programed out of bus... but not to worry about it.. basically don't bring it to us we will clear it and send it back to you...
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