NHTSA ID Number: 11016763
Manufacturer Communication Number: WSA4
TSB/Document Date: 2025-04-07
Summary
Technical Information - WSA4–Re-Programming Gateway Control Unit (Battery Sensor)(Workshop Campaign)
Service
Technical Information
2025
ENU
WSA4
2
WSA4 – Re-Programming Gateway Control Unit (Battery Sensor) (Workshop Campaign)
Important:
CRITICAL WARNING -This campaign includes steps where control unit(s) in the vehicle will be programmed
with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5 volts during this
programming. Failure to maintain this voltage could result in damaged control unit(s). Damage caused by
inadequate voltage during programming is not a warrantable defect. The technician must verify the actual
vehicle voltage in the PIWIS Tester before starting the campaign and also document the actual voltage on the
repair order.
Model Year:
As of 2019 up to 2024
Model Line:
Cayenne (9YA/9YB)
911 (992)
Concerns:
Gateway control unit (battery sensor)
Cause:
Due to a software error of the battery sensor of the 12-volt vehicle electrical system battery, it is possible
that the battery data of the affected vehicles is calculated incorrectly.
Depending on the usage behavior, this can lead to a premature recommendation to replace the 12-volt
vehicle electrical system battery.
Action:
Re-program the battery sensor using the latest PIWIS Tester software version.
Minimum requirement: Release 43.200.041 (or higher)
•
•
Affected
Vehicles:
Re-programming gateway control unit (battery sensor) Vehicles with scope 1 ⇒ Technical Information
'Gateway control unit (re-programming battery sensor) only valid for Cayenne (9YA/ 9YB) up to model
year 22'
Re-programming Gateway control unit (battery sensor) Vehicles with scope 2 and scope 3 ⇒ Technical
Information 'Gateway control unit (re-programming battery sensor) only valid for vehicles from model
year 2022' onwards
Only vehicles assigned to the campaign (also see PCSS Vehicle Information).
Required tools
Tools:
•
•
P90999 - PIWIS Tester 4 with PIWIS Tester test software version 43.200.041 (or higher) installed
Battery charger with a current rating of at least 90 A and a current and voltage-controlled charge map
for lithium starter batteries, e.g., VAS 5908 battery charger 90 A
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Mar 19, 2025
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WSA4
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Technical Information
2025
Re-programming gateway control unit (battery sensor) only valid for vehicles with scope 1
Work Procedure: 1
The basic procedure for programming a control unit is described in the Workshop Manual ⇒ Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming using the PIWIS Tester
– section on “Programming”'.
For specific information on control unit programming during this campaign, see the table below.
Required PIWIS Tester software release:
43.200.041 (or higher)
Type of control unit programming:
Control unit programming using the ‘Campaign’
function in the additional menu on the PIWIS Tester
by entering a programming code.
Programming code:
E3B4T
Programming sequence:
Read and follow the information and instructions on
the PIWIS Tester during the guided programming
sequence.
During the programming sequence, the battery
sensor is re-programmed and then automaticallyrecoded.
Do not interrupt the programming and coding
process.
A backup documentation process for the
re-programmed software releases starts after
programming and coding.
Programming time (approx.):
13 minutes
Software release programmed during this
campaign:
•
Gateway control unit (battery sensor): 2,000
Following control unit programming, the software
version can be read out of the instrument cluster
control unit in the ⇒ ‘Extended identifications’ menu
from the gateway control unit using the PIWIS Tester.
The software part number and software version
of the programmed data record are based on the
specified PIWIS Tester test software release. Please
note that this may be different in a later release.
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Technical Information
2025
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WSA4
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Procedure if error messages appear during
programming sequence:
⇒ Workshop Manual '9X00IN Basic instructions and
Procedure in the event of a termination in the
control unit programming:
Repeat control unit programming by restarting
programming.
2
procedure for control unit programming using the
PIWIS Tester – section on “Troubleshooting”'.
Read out and delete all control unit fault memories.
2.1
In the control unit selection (‘Overview menu’), press •F7“ to call up the Additional menu.
2.2
Select the function “Read all error memories and delete if necessary” and press •F12“ (‘Next’)
to confirm.
Information
If control units are found to have faults that are not caused by control unit programming, they must first be
located and corrected. This work cannot be invoiced under the workshop campaign number.
3
Enter the campaign in the Warranty and Maintenance Logbook.
Continue with warranty processing Scope 1 ⇒ Technical Information '9X00IN Warranty processing'
Re-programming gateway control unit (battery sensor) only valid for vehicles with scope 2 and scope 3
Work Procedure: 1
The basic procedure for programming a control unit is described in the Workshop Manual ⇒ Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming using the PIWIS Tester
– section on “Programming”'.
For specific information on control unit programming during this campaign, see the table below.
Required PIWIS Tester software release:
43.200.041 (or higher)
Type of control unit programming:
Control unit programming using the ‘Automatic
programming’ function of the gateway control unit:
‘Gateway’ control unit – ‘Coding/programming’
menu – ‘Automatic programming’ function
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Technical Information
2025
Programming sequence:
Read and follow the information and instructions on
the PIWIS Tester during the guided programming
sequence.
During the programming sequence, the battery
sensor is re-programmed and then automaticallyrecoded.
Do not interrupt the programming and coding
process.
A backup documentation process for the
re-programmed software releases starts after
programming and coding.
Programming time (approx.):
15 minutes
Software release programmed during this
campaign:
•
Gateway control unit (battery sensor): 2,000
Following control unit programming, the software
version can be read out of the instrument cluster
control unit in the ⇒ ‘Extended identifications’ menu
from the gateway control unit using the PIWIS Tester.
The software part number and software version
of the programmed data record are based on the
specified PIWIS Tester test software release. Please
note that this may be different in a later release.
Procedure if error messages appear during
programming sequence:
⇒ Workshop Manual '9X00IN Basic instructions and
Procedure in the event of a termination in the
control unit programming:
Repeat control unit programming by restarting
programming.
2
procedure for control unit programming using the
PIWIS Tester – section on “Troubleshooting”'.
Read out and delete all control unit fault memories.
2.1
In the control unit selection (‘Overview menu’), press •F7“ to call up the Additional menu.
2.2
Select the function “Read all fault memories and delete if necessary” and press •F12“ (‘Next’)
to confirm.
Information
If control units are found to have faults that are not caused by control unit programming, they must first be
located and corrected. This work cannot be invoiced under the workshop campaign number.
Mar 19, 2025
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AfterSales
Service
Technical Information
3
2025
ENU
WSA4
2
Enter the campaign in the Warranty and Maintenance Logbook.
Continue with warranty processing Scope 2 and Scope 3 ⇒ Technical Information '9X00IN Warranty
processing'
Warranty processing
Scope 1:
Programming gateway control unit
•
•
valid for Cayenne (9YA / 9YB)
up to model year 2022 ( < MY 2022)
Labor time:
Programming gateway control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Read out and delete fault memories
Labor time: 48 TU
Þ Damage number WSA4 066 000 1
⇒
Scope 2:
Programming gateway control unit
•
•
valid for Cayenne (9YA / 9YB)
from model year 2022 (>= MY 2022)
Labor time:
Programming gateway control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Read out and delete fault memories
Labor time: 52 TU
Þ Damage number WSA4 066 000 1
⇒
Scope 3:
Programming gateway control unit
•
valid for 911 (992)
AfterSales
Mar 19, 2025
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Technical Information
2025
Labor time:
Programming gateway control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Read out and delete fault memories
Labor time: 55 TU
Þ Damage number WSA4 066 000 1
⇒
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.
© 2025 Porsche Cars North America, Inc.
Mar 19, 2025
Page 6 of 6
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TSB/Document ID: WSA4
Replacement Service Bulletin Number:
MFR Communication Date: 2025-03-19
MFR Internal Campaign ID/Software Version: WSA4
Communication Type: Service Campaign
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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