PSM. Control Unit Fault. Centre Diff Lock

[dab996]

Hello fellow members,

I have a strange anomaly with my 2011 Pan Turbo PSM in that there are no warning lights on the dash yet when i press the PSM button, i get a brief readout stating - fault, all wheel drive system on and then after a second it disappears. Could it be battery? The AA confirmed it was and duly replaced tit but for some reason the patrol man, who was new to the AA, could not code it to the car so Dick Lovett Porsche Bristol provided the service for an eye watering £199:20. Here's where it gets interesting, They were told about the fault and so I was pleasantly surprised when they called me to say car is ready and no issues. Now, no one from Porsche showed me around the car to explain what had been done, as it was 6:30pm on a Friday, however they did provide a health check report with no issues were found, in fact the one for sensors was ticked green. I subsequently drove the car home and thought nothing of it. It's now Wednesday (last) and i thought i'll try the PSM button and to my dismay, same message pops up and then disappears saying - fault, all wheel drive system on and no warning lights on dash. I immediately drove to Porsche and left the car with them at 7:30am to then get a call at 3pm saying - Mr Beal you cannot just drop your car in, you need to book it in, even though the car was given a clean bill of health when clearly it's not. I now have the car booked in for tomorrow (16th) and wondered if anyone could shed some light on what the codes listed below.

Many thanks,

 

[dab996]

I should also point out that in clearing the codes PSM works as it should with Sport and Sport Plus available, yet within a few days and without any warning it stops again.

 

[malarcy]

C120A1

Diagnostic information valid for all control units
Read out control unit fault memory content
INFORMATION
This fault code indicates one or more faults/notes in the fault memory of the designated control
unit.
Existing faults/notes in the designated control unit must be processed first.
NOTE
Use the [F7] button to show/hide notes in the fault memory.
Possible fault causes
Fault in the designated control unit
Note in the designated control unit
Fault effects
Functions in the control unit are available only with restrictions
Functions in the control unit are not available

I read that as "there are other faults"

002085
002085
Diagnosis information PSM
Fault Sport mode
Diagnostic conditions
The control unit must be active in order to test internal function sequences and diagnosable
inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check,
erase the fault memory, meet the diagnostic conditions and read out the fault memory again.
Fault setting condition(s)
This fault is set on vehicles equipped with the Sport Chrono package if one of the following
systems is faulty:
DME control module
PDK control unit
Gateway control module
PASM control module
Centerdifferential lock control unit

0208a
00208A

Diagnosis information PSM
Fault Sport mode
Diagnostic conditions
The control unit must be active in order to test internal function sequences and diagnosable
inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check,
erase the fault memory, meet the diagnostic conditions and read out the fault memory again.
Fault setting condition(s)
This fault is set on vehicles equipped with the Sport Chrono package if one of the following
systems is faulty:
DME control module
PDK control unit
Gateway control module
PASM control module
Centerdifferential lock control unit


Not familiar with the TOPDON unit in use - but are those "all the codes" logged for the entire car - since the above seem to indicate a fault with something other than the PSM

Caveat to the following - not familiar with the Panemera.....

In other models - PSM will log a fault if there is an issue with things like abs, or active suspension - so maybe the PSM is trying to tell you look elsewhere, in the case of the displayed output of the first one, is there a separate "diff lock" module you can query ?

Also - in other models - pressing the PSM button turns it off (or rather reduces it's effect) - it's on all the time usually - not saying that a fault should happen if you do press it. The other 2 faults both say "only checked and triggered in SPORT mode" - that possibly explains why it's not triggered straight away.

Interested to hear the diagnosis, and hope the above helps a bit

 

[dab996]

C120A1

Diagnostic information valid for all control units
Read out control unit fault memory content
INFORMATION
This fault code indicates one or more faults/notes in the fault memory of the designated control
unit.
Existing faults/notes in the designated control unit must be processed first.
NOTE
Use the [F7] button to show/hide notes in the fault memory.
Possible fault causes
Fault in the designated control unit
Note in the designated control unit
Fault effects
Functions in the control unit are available only with restrictions
Functions in the control unit are not available

I read that as "there are other faults"

002085
002085
Diagnosis information PSM
Fault Sport mode
Diagnostic conditions
The control unit must be active in order to test internal function sequences and diagnosable
inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check,
erase the fault memory, meet the diagnostic conditions and read out the fault memory again.
Fault setting condition(s)
This fault is set on vehicles equipped with the Sport Chrono package if one of the following
systems is faulty:
DME control module
PDK control unit
Gateway control module
PASM control module
Centerdifferential lock control unit

0208a
00208A

Diagnosis information PSM
Fault Sport mode
Diagnostic conditions
The control unit must be active in order to test internal function sequences and diagnosable
inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check,
erase the fault memory, meet the diagnostic conditions and read out the fault memory again.
Fault setting condition(s)
This fault is set on vehicles equipped with the Sport Chrono package if one of the following
systems is faulty:
DME control module
PDK control unit
Gateway control module
PASM control module
Centerdifferential lock control unit


Not familiar with the TOPDON unit in use - but are those "all the codes" logged for the entire car - since the above seem to indicate a fault with something other than the PSM

Caveat to the following - not familiar with the Panemera.....

In other models - PSM will log a fault if there is an issue with things like abs, or active suspension - so maybe the PSM is trying to tell you look elsewhere, in the case of the displayed output of the first one, is there a separate "diff lock" module you can query ?

Also - in other models - pressing the PSM button turns it off (or rather reduces it's effect) - it's on all the time usually - not saying that a fault should happen if you do press it. The other 2 faults both say "only checked and triggered in SPORT mode" - that possibly explains why it's not triggered straight away.

Interested to hear the diagnosis, and hope the above helps a bit

Thank you. I will keep you posted.