NHTSA ID Number: 10200890
Manufacturer Communication Number: No. 120-21
TSB/Document Date: 2021-09-02
Summary
Porsche
service campaign information for Workshop Campaign WMH0 - Re-Programming Various Control Units.
Service
Technical Information
120/21 ENU WMH0
9
WMH0 - Re-Programming Various Control Units (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 2020 up to 2021
Model Line:
Taycan (Y1A)
Taycan Cross Turismo (Y1B)
Concerns:
Re-programming various control units
Information:
During a data analysis of hardware and software statuses and their combinations in vehicles in
the field, it was discovered that the affected vehicles display a discrepancy from the defined
target status.
This means that the consistency of the combination of hardware and software versions defined and
approved by Porsche cannot be guaranteed.
Action required: •
•
•
Re-program control units together with the PIWIS Tester and installed software version 40.450.020
(or higher).
Depending on the software version of the individual control units installed in the vehicle, other control
units must also be re-programmed or coded.
Only the control units that do not meet the defined VR12.1.1 software target status are
programmed.
Information
The guided programming sequence during this campaign includes all control units from the
corresponding software releases, in addition to those which are to be reprogrammed. In the
programming sequence, the following software versions of the individual control units are
again compared with the target status of the software release. If the actual status already
matches, the programming of the relevant control unit is automatically skipped, and so the
scope of the control units may vary depending on the vehicle.
AfterSales
Aug 24, 2021
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Service
WMH0
Technical Information
ENU 120/21
Information
Each vehicle affected by this measure has been assigned exactly one scope, which includes the
measures required for updating the software.
For details of the exact scope of this campaign that is assigned to each vehicle, see PCSS Vehicle Information.
An overview of the corresponding action required for each scope can be found in the table below.
Overview of scopes:
Allocation
Model year
Scope 1:
•
Vehicles of model year
2020
•
•
•
VR8.6
VR8.7
VR12.1.1 - > Sequence 2
Scope 2:
•
Vehicles of model year
2020
Vehicles of model year
2021
•
VR12.1.1 - > Sequence 2
•
Scope 3:
•
Vehicles of model year
2020
•
VR12.1.1 - > Sequence 1
Scope 4:
•
Vehicles of model year
2020
Vehicles of model year
2021
•
VR12.1.1 - > Sequence 3
Vehicles of model year
2020
•
•
•
VR8.6
VR8.7
VR12.1.1 - > Sequence
1/2/3
•
Scope 5:
Affected
Vehicles:
Aug 24, 2021
Page 2 of 65
Scope of work for control unit
programming
•
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
AfterSales
Service
Technical Information
120/21 ENU WMH0
9
Required tools
Information
The Taycan (Y1A/Y1B) is equipped as standard with a lithium starter battery.
Lithium starter batteries must only be charged using a suitable battery charger that has a current
and voltage-controlled charge map.
For further information about the battery chargers to be used, see Workshop Manual '270689
Charging battery/vehicle electrical system'.
Tools:
•
•
Battery charger with a current rating of at least 90 A and also with a current and voltagecontrolled charge map for lithium starter batteries, e.g. VAS 5908 battery charger 90 A
9900 - PIWIS Tester 3 with software version 40.450.020 (or higher) installed.
Preparatory work - all scopes
NOTICE
Fault entry in the fault memory and control unit programming aborted due to undervoltage.
•
Increased current draw during diagnosis or control unit programming can cause a drop in voltage, which
can result in one or more fault entries and the abnormal termination of the programming process.
Before starting control unit programming, connect a suitable battery charger with a current rating of at
least 90 A to the vehicle.
NOTICE
Control unit programming will be aborted if the WiFi connection is unstable.
•
An unstable WiFi connection can interrupt communication between the PIWIS Tester and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.
During control unit programming, always connect the PIWIS Tester to the vehicle communication module
(VCI) via the USB cable.
NOTICE
Control unit programming will be aborted if the driver's key is not recognized
•
If the driver's key is not recognized in the vehicle, programming cannot be started or will be interrupted.
Position the driver's key with the back facing forward upright between the holding struts in the rear
cupholder (emergency start tray) to ensure a permanent radio link between the vehicle and remote
control.
AfterSales
Aug 24, 2021
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Service
WMH0
Technical Information
ENU 120/21
NOTICE
Programming interrupted
•
Malfunctions in control unit
•
Risk of damage to control unit
Route the line between the vehicle communication module (VCI) and diagnostic socket on the vehicle
without tension and make sure that the connector is inserted fully into the diagnostic socket.
Check that the rechargeable battery for the PIWIS Tester is charged sufficiently. Connect the PIWIS Tester
to the power supply unit if necessary.
Information
To carry out the campaign, the PIWIS Tester must be online and logged into the Porsche Partner Network
(PPN).
Information
Use the new PIWIS Tester data cable to carry out the
campaign. The difference between the old PIWIS Tester
data cable -1- and new PIWIS Tester data cable -2data cable is shown in the illustration.
If the connection between the vehicle and PIWIS Tester is
interrupted, check the data cable for the PIWIS Tester for
signs of damage. If the data cable is damaged, it must be
replaced. To do this, follow the instructions in the PPN
for "Returning faulty USB cable caps" (PPN portal > Dr
Ing. h.c. Porsche AG > Aftersales > Workshop > PIWIS >
Documents).
Information
The procedure described here is based on the PIWIS
Tester 3 software version 40.450.020.
The PIWIS Tester instructions take precedence and in the
event of a discrepancy, these are the instructions that
must be followed.
A discrepancy may arise with later software versions for example.
Aug 24, 2021
Page 4 of 65
AfterSales
PIWIS Tester data cable
Service
Technical Information
120/21 ENU WMH0
9
Information
To prevent any excessive and potentially noticeable heating of the charging clamp of the negative cable
while charging the 12-volt vehicle electrical system battery using an external battery charger, always
check the following points:
•
Always connect the charging terminal of the negative cable vertically from above to the ground point
for the external power connection. Make sure that the charging clamp cable is routed loosely to
prevent the charging clamp from tilting sideways at the ground point.
•
When connecting the charging clamp, make sure that it is a sufficient distance away from peripheral
parts (e.g. pneumatic supply line for air-spring strut).
•
Before raising the vehicle using a lifting platform, always disconnect the battery charger completely
from the vehicle in order to prevent the connecting line of the charging terminal from becoming taut
and the charging terminal tipping sideways at the ground point as a result.
Information
The state of charge of the high-voltage battery should not be less than 30% or more than 80% for the
software update.
Work Procedure: 1
Connect a suitable battery charger, e.g. Battery charger 90A, to the jump-start terminals in the
luggage compartment and switch it on.
2
Position the driver's key with the back facing
forward upright between the holding struts in the rear
cupholder (emergency start tray) to guarantee a
permanent radio link between the vehicle and remote
control Emergency start tray.
3
Connect 9900 - PIWIS Tester 3 to the vehicle
communication module (VCI) via the USB cable.
Then, connect the communication module to the
vehicle and switch on the PIWIS Tester.
Operate the PIWIS Tester via the power supply unit.
4
Establish operational readiness (switch on ignition).
5
On the PIWIS Tester start screen, call up the 'Diagnostics' application.
Emergency start tray
The vehicle type is then read out, the diagnostic application is started and the control unit selection
screen is populated.
6
Create vehicle analysis log (VAL) using the PIWIS Tester.
Mark the vehicle analysis log you have just created with the attribute "Initial VAL" and after carrying
out the campaign, return it using the PIWIS Tester.
AfterSales
Aug 24, 2021
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Service
Technical Information
ENU 120/21
WMH0
7
Read out and check the fault memory.
Mark the vehicle analysis log you have just created with the attribute "Initial VAL" and after carrying
out the campaign, return it using the PIWIS Tester.
Then, perform the control unit update in accordance with the scope that is uniquely
assigned to the respective vehicle.
For details of the exact scope of this campaign that is assigned to each vehicle, see PCSS Vehicle
Information.
Allocation
Software
Scope 1:
•
•
•
VR8.6
VR8.7
VR12.1.1 - >
Sequence 2
Technical Information '270689 Re-program various
•
VR12.1.1 - >
Sequence 2
Technical Information '270689 Re-program various
VR12.1.1 - >
Sequence 1
Technical Information '270689 Re-program various
VR12.1.1 - >
Sequence 3
Technical Information '270689 Re-program various
VR8.6
VR8.7
VR12.1.1 - >
Sequence 1/2/3
Technical Information '270689 Re-program various
Scope 2:
Scope 3:
Scope 4:
Scope 5:
•
•
•
•
•
Action required
control units - Scope 1'.
control units - Scope 2'.
control units - Scope 3'.
control units - Scope 4'.
control units - Scope 5'.
Re-program various control units - Scope 1
WARNING
Electrically moved side windows and rear spoiler
•
Danger of limbs being trapped or severed
•
Risk of damage to components
Do not reach into the danger area.
Keep third parties away from the danger area.
Do not move components or tools into the danger area.
NOTICE
Using the software on vehicles that are not assigned to this campaign:
•
Risk of damage to control unit
Aug 24, 2021
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AfterSales
Service
Technical Information
120/21 ENU WMH0
9
Use the listed software versions only for the vehicles assigned to the campaign.
Information
The guided programming sequence during this campaign includes all control units from the
corresponding software releases, in addition to those which are to be reprogrammed. In the
programming sequence, the following software versions of the individual control units are
again compared with the target status of the software release. If the actual status already
matches, the programming of the relevant control unit is automatically skipped, and so the
scope of the control units may vary depending on the vehicle.
Information
To ensure that no user-specific settings from cloud-based services (Porsche Connect & My
Porsche) are lost during the update, activate Privacy mode before starting the update. When Privacy
mode is activated, communication between the vehicle and the Porsche Connect app and My Porsche is
disabled. No vehicle-specific information is transferred. As a result, settings cannot be configured on the
vehicle using the Porsche Connect app or My Porsche.
When the instrument cluster and central computer are re-programmed, the individual settings
implemented in the vehicle by the customer will be lost and reset to the default values of the country
version that applies to the vehicle.
After carrying out the campaign, please inform customers that personal settings they have implemented
in the instrument cluster and central display of the central computer will have to be set again and provide
them with any help and support they need for setting the relevant options.
This affects the following settings, for example:
•
Individual settings for tubes 1 to 3 of the instrument cluster as well as the extended map view or
reduced view of the instrument cluster
•
Individual settings of the head-up display (HUD)
•
Selected functions of individual tubes in the instrument cluster, e.g. auto zoom, 3D map and satellite
map
•
Arrangement of tiles in the home screen and MyScreen on the central display
•
Individual seat, exterior mirror and ergonomic settings
•
Air conditioning settings, such as ventilation and air quality
•
Privacy settings
•
Frequency setting of the garage door opener (Homelink)
Information
Only control units that are not up-to-date are updated. As a result, programming is aborted if
the control units have already been updated.
AfterSales
Aug 24, 2021
Page 7 of 65
9
Service
WMH0
Work Procedure: 1
Technical Information
ENU 120/21
Only relevant for vehicles with Scope 1: Start control unit programming of VR8.6.
The basic procedure for control unit programming is described in the Workshop Manual
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester'
For specific information on control unit programming of VR8.6 during this campaign, see
the table below:
Required PIWIS Tester software version:
40.450.020 (or higher)
Type of control unit programming:
Control unit programming using the 'Campaign'
function in the Additional menu on the PIWIS
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TSB/Document ID: No. 120-21
Replacement Service Bulletin Number:
MFR Communication Date: 2021-08-24
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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