The other day my '11 TDV8 came up with the 'Park Brake Fault'.

IID suggests "U2002-92 (2B) Switch general electrical failure - Component failure - performance or incorrect operation".

That lasted for a day or two before the dash lit up like a Christmas tree:

"Stability Control Not Available"
"HDC Not Available"
"Emergency Brake Assist Not Available"

Checking IID again and we now have "U0128-00 (2E) Lost communication with parking brake control module"

Plus a few others that seem related:

U0140-00 (A Lost communication with body control module
U0415-68 (2C) Invalid data received from ABS control module - Algorithm based failure - event information
B100D-87 (2 Column lock authorisation - Bus signal/message failure - missing a message
U0415-00 (2C) Invalid data from ABS control module
U0415-00 (2 Invalid data from ABS control module

This morning we get a Gearbox Failure message wihich IID shows as:

U101B-87 (2C) Lost communication with GSM - multiple bus - Bus signla/message failure - missing a message
B1087-82 (2C) LIN bus A - Bus signal/.message failure - alive/sequence counter is incorrect/not updated
U0103-63 (2C) Lost communication with gearshift module - Algorithm based failure - circuit/component protection time out.

I can clear the faults and haven't seen the gearbox faults since, but the others show up after driving for ten to twenty metres.

Have I got a wiring issue or is the parking brake throwing errors all over the place?

First thing to check would be battery voltage....  Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

100% battery related... U & B faults are always ghost faults almost certainly related to voltage on startup...

Thanks. Having checked the battery it does appear to be fairly close to dead.

My TopDon BT200 battery tester said it was only 19% healthy and would only hold 58% charge. Oops!

My concern is that the unit didn't even register the Cranking Test them I started the engine and an epic fail for the Charging Test. It stated 'No Voltage Out' which would be fine if the manual actually told you what that meant.

How do I test the alternator as I'd rather not wreck a new battery if there is a bigger problem that needs investigating?

Fit new battery, start the engine and measure the battery voltage, should be around 14.5.....  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-