Labor time: 74 TU

 Damage number ARC5 099 000 1

FAQs on control unit programming and coding
Information
If individual programming or rework procedures could not be carried out correctly, please refer to
the Workshop Manual for the basic procedure for control unit programming with the PIWIS tester. 
Technical Information '9X10IN Basic information and procedure for control unit programming with the
PIWIS tester. Information':
In the event of a fault, always create a log with the PIWIS tester during programming with •P2“.

Nov 27, 2024
Page 6 of 10

AfterSales

Service

Technical Information
Work
procedure:

228/24 ENU

ARC5

9

General:
Fault indication

Cause

Source of
fault

Remedial action

Control unit
programming

The affected control
unit did not respond
or did not respond
completely when the
vehicle information was
read out.

Vehicle

•
•
•
•

Cause

Source of
fault

Remedial action

Diagnostic application
crashes (JAVA error
message)

Diagnostic
application

•

Restarting diagnostic
application

The VCI connection
has been aborted
(the diagnosis has no
information on battery
voltage – see the
battery symbol at the
top right on the Tester
display).

VCI has
poor WiFi
connection

•

Restart tester, reinsert VCI
and try again
Ensure that WiFi connection
is stable, moving vehicle
to a suitable position in
workshop if necessary

USB memory stick not
detected or no change
on central display after
plugging it in.

Infotainment
main control
unit (HCP3)

•

Cancel procedure
Close diagnosis
Terminal 15 Change
Restart procedure

Before the update:
Fault indication

•

•

AfterSales

Pull fuse for Infotainment
main control unit (HCP3)
and wait around 1 minute
(30-amp fuse is located
on passenger side below
A-pillar)
Reinsert fuse for
Infotainment main control
unit (HCP3)

Nov 27, 2024
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9

Service
ARC5

Technical Information

ENU 228/24

During the update:
Fault indication

Cause

Diagnostic application
crashes (JAVA error
message)

Source of
fault

Remedial action

Diagnostic
application

•
•
•

•

The following fault
occurs at the step
“Attempting to
connect to SOD”:
“The release versions
of Tester and PIUS do
not match.”

PIWIS Tester 4 did not
receive the required
release update. Since
the PIUS installs the
updates automatically,
the release versions no
longer match.

PIWIS Tester
and PiUS

PIWIS Tester 4
cannot establish
communication with
diagnostic tester;
error message on first
attempt to establish
communication

Date/time in the vehicle
is incorrect after
disconnecting/reconnecting the 12-V
battery (terminal 30)

Vehicle

•
•

•
•
•

AfterSales

Install current release on
PIWIS Tester 4
Check availability of current
release on PiUS workshop
server

Correct date/time in the vehicle:

•

Nov 27, 2024
Page 8 of 10

Checking update progress
in vehicle is mandatory
No ignition change
during the update
Do not restart the tester
until the update has
been completed in the
vehicle (“Messages” tile
--> installation “successful”)
When the update has
finished in the vehicle, verify
that the update is complete.
To do this, restart the
integration test using the
PIWIS Tester.

Open “Control unit
overview”
Access “Gateway HCP5”
main control unit
Open “Service / Maintenance” menu
Select and execute “Set
time” menu item

Service

Technical Information

228/24 ENU

When the update
calculation result is
displayed, the following
fault occurs in all
control units to be
programmed/coded:
“Fault in determining
the target state for
coding/programming”

Fault while calculating in
backend system

On PIWIS Tester 4, the
progress of the vehicle
update is not shown
until approx. 27% has
been completed.

Diagnostic service
(RPC+) will not forward
the progress of the
update to the Tester
until it is approx. 27%
complete.

•
•

Charging communication 1 (J1245) or
charging communication 2 (J1246) in
update attempt not
OK --> communication error.

Programming or coding
aborts at approx. 30%.

Backend
system

ARC5

9

Lock vehicle and wait for
bus rest
Repeat update

Vehicle

•

Wait until progress is
displayed

Vehicle,
GOBW

•

•
•
•
•

Final integration test
reports a communication
error
Pull fuse from affected
control unit
Remove fuse
Wait 30 seconds
Re-insert fuse
Re-attempted update
Repeat routine

•

Cleaning of the
systems in the
background prevents
the programming or
coding from being
completed.

Backend
system

•

Cause

Source of
fault

Remedial action

Vehicle

•

After the update:
Fault indication
Delete the fault from the
fault memory.

AfterSales

Fault can be ignored

Nov 27, 2024
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9

Service
ARC5

Technical Information

ENU 228/24

The VCI connection
has been aborted
(the diagnosis has no
information on battery
voltage – see the
battery symbol at the
top right on the Tester
display).

VCI has
poor WiFi
connection

•

Diagnostic application
crashes (JAVA error
message)

Diagnostic
application

•

Restarting diagnostic
application

•
•

Switch ignition off and on
Re-reading and deleting
fault memory

Passive fault memories
from high-voltage
control units cannot
be erased.

•

Restart tester, reinsert VCI
and try again
Ensure that WiFi connection
is stable, moving vehicle
to a suitable position in
workshop if necessary

Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.

© 2024 Porsche Cars North America, Inc.

Nov 27, 2024
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AfterSales