[CA] [CA11] Yamaha CL 6YG stopped displaying 2019 F70 Yamaha engine data - troubleshooting

[ray18]

Yamaha CL 6YG stopped displaying 2019 F70 Yamaha 70 hp engine data on my Raymarine Axiom 9" RV100 with LH 3.10.[censored] - troubleshooting - need help!!!

My previous attempt to display my 2019 Yamaha 70 hp engine data was successful displaying Total engine hour and trim level without motor running (ie. just had the key switch turned on but no motor running). I waited to get on the water to test the RPM and oil pressure etc. To my amazement, no RPM nor oil pressure nor fuel flow was displaying on my Axiom 9" RV100.

My total engine hours stopped displaying after my last outing last week, so I opened up the command link multi-hub to check for loose connections, but found no problems (the hub was getting voltage and 60 ohm between the blue and white data wire with all devices turned off as they should).

So, I am planning to buy a Yamaha digital TAC gauge (6Y8-8350T-D0-00) to try displaying the F70 engine data on the Yamaha TAC gauge parallel to the NEMA 2000 Axiom display to narrow down the problem and also have a spare RPM displaying gauge on the water when Axiom fail to display the RPM.

(1) Please confirm with the Yamaha digital gauge, I can remove the Yamaha CL gateway (6YG-8A2D0-00-00) as shown in attached wiring diagram.
(2) Please let me know other ideas that I can do to troubleshoot the Axiom MFD and 6YG CL gateway integration problems.
(3) Please confirm my diagram is correct with 3 additional item to buy (I am also asking Yamaha to help about this):
(3.1) Yamaha digital TAC gauge (6Y8-8350T-D0-00)
(3.2) 12 feet pigtail harness (6Y8-82521-51-00)
(3.3) GPS powerlead wire (6YD-83553-00-00)