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Discussion Starter #221
Possibly it's some emergency charging logic. Get the rpms up to increase alternator output? A single missed can message will store a code, missing several will trigger all sorts of errors and warnings.
If it was doing that it should have down shifted, not shifted into neutral. I had more than 50 stored errors, with every block that MES can poll except the ECM reporting errors (ECM was probably reset when I removed the EC P2 tune in preparation for the the W05 recall). Pretty much every error was CAN bus communication fault. I haven't checked the wiring, but I suspect that more than one CAN bus was involved, which would be most consistent with a voltage issue.

I cleared a few without writing them down, but here is the list of those that I did write down. Some transcription errors are likely:

ABS
C0076-68 U1701-87 U1757-87 U1767-87
Air Bag
U1700-87 U1701-87 U1703-87 U1930-86
EPS
C1018-68 U1700-87 U1701-87 U1702-87 U1703-87 U1704-87 U1960-83
Continental Instrument Panel
U1711-87 U1736-86 U1736-87 U1751-87 U1752-87 U1757-87 U1765-86 U1765-87 B1029-64 B102E-64
Radio/Nav
B2206-00 U0155-87 U0155-8F
Multimedia
B1602-68
Body
U0001-87 U0020-87 U1001-87 U1703-86 U1722-87 U1766-8F U1931-86
TRW climate control
U1700-87 U1703-87 U1724-87
Headlights
U1700-87 U1701-87 U1703-87
Blindspot left and right (same errors on both)
U1700-86 U1703-86 U1460-64
Parking Control
U1700-87 U1930-29 U1933-87 C1003-29 C1001-29

DTCM had errors, but I did not write them down.
IIRC transmission had errors, but I did not write them down.
 

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If it was doing that it should have down shifted, not shifted into neutral. I had more than 50 stored errors, with every block that MES can poll except the ECM reporting errors (ECM was probably reset when I removed the EC P2 tune in preparation for the the W05 recall). Pretty much every error was CAN bus communication fault. I haven't checked the wiring, but I suspect that more than one CAN bus was involved, which would be most consistent with a voltage issue.

I cleared a few without writing them down, but here is the list of those that I did write down. Some transcription errors are likely:

ABS
C0076-68 U1701-87 U1757-87 U1767-87
Air Bag
U1700-87 U1701-87 U1703-87 U1930-86
EPS
C1018-68 U1700-87 U1701-87 U1702-87 U1703-87 U1704-87 U1960-83
Continental Instrument Panel
U1711-87 U1736-86 U1736-87 U1751-87 U1752-87 U1757-87 U1765-86 U1765-87 B1029-64 B102E-64
Radio/Nav
B2206-00 U0155-87 U0155-8F
Multimedia
B1602-68
Body
U0001-87 U0020-87 U1001-87 U1703-86 U1722-87 U1766-8F U1931-86
TRW climate control
U1700-87 U1703-87 U1724-87
Headlights
U1700-87 U1701-87 U1703-87
Blindspot left and right (same errors on both)
U1700-86 U1703-86 U1460-64
Parking Control
U1700-87 U1930-29 U1933-87 C1003-29 C1001-29

DTCM had errors, but I did not write them down.
IIRC transmission had errors, but I did not write them down.
If all those were lights, you'd have enough for a Christmas tree.
 

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Discussion Starter #223 (Edited)

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Discussion Starter #225
Hence the "if". That no errors were indicated adds to the mystery.
You did not specify lights that might be put on a tree versus lights on a dashboard.
I have had a CAN bus fault light up the dashboard, taking close to a minute to sequence through the error displays. This happened almost a year ago, also when the battery voltage was low. At that time the battery voltage returned to normal by itself after a while. Other possible causes of low battery voltage would be in order the IBS, the BCM and the "smart" alternator. Modules failing to power down when the car is parked (note the recent updates to fix known bugs of this type) is another potential source of transient battery voltage trouble.
 

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@lockem Every time I connect MES and check each module I see a lot of CAN comms errors similar to yours but perhaps not as much. The only errors I worry about are those in the PCM, TCM and ABS modules most of which will throw a warning or a CEL. The CAN/Comms errors will not show dashboard warning. I accept this is normal for the Giulia as has been the case over 3 years of ownership.
 

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You did not specify lights that might be put on a tree versus lights on a dashboard.
Coronavirus stress making you extra picky or affecting your sense of humour? A drive in your Giulia may be just the thing.
 

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I had CAN bus errors when I would leave the SGW bypass installed. Once I removed it, no problems at all. I no longer have that issue though, for some unknown reason. It's installed permanently now. fyi.
 

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Discussion Starter #229
I got in the car and drove to Pep Boys to get the Champion AGM battery. I enabled my OBD2AA IBS voltage tracking on the AA screen and the battery voltage immediately jumped to 14.3V (max charge rate) and when I turned the car off only a few minutes later the apparent resting voltage was 12.6 rather than the 11.7 that I had observed the day before. My experience is that this is classic weak battery (low acid level?) behavior. Also AA stopped working shortly there after, further pointing to a fault of some kind.
 

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Discussion Starter #230
Next update:

Use scan DTC in MES to check for and clear error codes. It can find error codes on modules that it otherwise does not understand.

If you try to connect to a module in MES before the car is on, your next step is to shut down MES, disconnect the cables and start over. MES apparently does not recover well from this user error.

My phone disconnect problem still happened with the new battery and a good battery voltage being reported. Since the phone is reporting that OBD2AA is crashing, I suspect that the fault lies in my phone and/or the hack SW that I have loaded onto it.

The resting voltage across my battery appears to be properly stable now.

I have not observed any new error codes. Only time will tell...

Walnut Creek Alfa has agreed to do the SW updates this Monday. Hopefully this will go better than the first try.
 

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Discussion Starter #231
Back from Walnut Creek Alfa, here is what I got:

According to them, the ECM and TCM are already up to date for my car. DTCM was updated (for a fee). They cannot figure out how to sample the transmission fluid for Blackstone. My SW versions are now:

ECM MM10JAHW232-00-G522TA10-000

TCM 10344202761-20-GK0901OD2FN

DTCM M0045027.01-21-M0110265-501

The first batch of numbers are the HW version. If that does not match your car, the rest is meaningless. Can anyone confirm if these really are the right versions for a car with W05 installed?
 
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