New System Monitor- Cat Errors

NotHerDecision

Well-Known Member
Jun 28, 2016
2,173
Houston, Texas
Boat Info
2001 Sea Ray 460 Sundancer
2014 Seadoo 155 LTD
2105 Seadoo 130 SE
2013 Mercury Dinghy
Engines
Cummins 6CTA 8.3L
Hi CSR! I am working on a 540DA that had a system's monitor DDU that melted. We ordered a new DDU and it works perfect except I am getting an alarm from both engines that says CAT Port Diagnostic and CA stbd Diagnostic. You can reset it but it comes right back. Anyone know what might be up with this?

All of the other functions on the system monitor work perfectly. This boat has CAT 3196 engines.

Thanks

Josh
 

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