NHTSA ID Number: 10199807
Manufacturer Communication Number: No. 16-21
TSB/Document Date: 2021-08-04
Summary
Porsche
service campaign information for Workshop Campaign WMA6 - Updating Software for Various Control Units.
Service
Technical Information
16/21
ENU
WMA6
9
WMA6 - Updating Software for 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:
2021
Revision:
This bulletin replaces bulletin Group 9 16/21 WMA6, dated May 28, 2021.
Model Line:
Taycan (Y1A)
Concerns:
Software update (software version VR12.1.1)
Information:
Software optimizations are available for various control units for the Taycan.
An overview of the new features that will be implemented with the software update can be found in
the enclosure under Technical Information 'Overview of new features implemented by the software
updates'.
Action required: Update the software for the following control units using the PIWIS Tester with test software version
40.200.016 (or higher) installed or USB storage medium. For details of affected control units, see
overview below.
Overview of control units for software version VR12.1.1
Control unit
Programming
time
Sequence 1: Combined software update for various
control units (update via PIWIS Tester)
approx. 100
minutes
Action required
program
code
Includes:
• Distance measuring sensor control unit (ACC)
• Front-end electronics (BCM1) control unit
• Rear-end electronics (BCM 2) control unit
• Radar sensor for front corner radar, left and
right
• Lane Change Assist, left and right
AfterSales
Jul 7, 2021
Page 1 of 19
9
Service
WMA6
ENU
Technical Information
16/21
• Central assistance systems (zFAS)
• Airbag control unit
• Reversing camera
Sequence 2: Combined software update for various
control units (update via PIWIS Tester)
approx. 70
minutes
Includes:
• High-voltage charger (OBC) 11 kW/22 kW
• High-voltage battery control unit (BMCe)
• High-voltage DC charger (booster)
• HV voltage converter
• Control unit for chassis control (PASM)
• Power steering control unit (EPS)
• Brake electronics (PSM) control unit
• Control unit for steering column adjustment
• Control unit for rear axle steering
• Rear lid control unit
• Air conditioning control unit
• Rear-differential lock control unit
• Thermal management control unit (TME)
• Electric passenger compartment heater (PTC)
• Gateway control unit
• Head-up display
• Instrument cluster
• Over-the-air (OTA) control unit
• OTA software partition
• Engine electronics (DME) control unit
• Power electronics, front and rear
• Roll stabilization control unit (PDCC)
• Headlights, left and right
Sequence 3: Combined software update for various
control units (update via PIWIS Tester)
Includes:
• Multifunction steering wheel
Jul 7, 2021
Page 2 of 19
AfterSales
approx. 30
minutes
Service
Technical Information
16/21
ENU
WMA6
9
• Seat adjustment control unit, front
• Additional instrument control unit (stopwatch)
• Door control unit, front and rear
• Control unit for exterior acoustics (eSound)
• Control unit for interior acoustics (eSound)
• Display and operator control unit in rear center
console
• Connect control unit
• Brake booster control unit (eBKV)
• Night vision system control unit
• Control unit for Tire Pressure Monitoring (TPM)
• Control unit for rear spoiler
• Inductive charger for mobile devices
Sequence 4: Combined software update for various
control units (update via PIWIS Tester and USB
storage medium)
approx. 50
minutes
Includes:
• Central computer (PCM)
• Loudspeaker booster
• Front display and operator control unit
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information). There are 2,025 vehicles
affected by this campaign.
Required tools
Information
The Taycan (Y1A) 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 - if required - also with a current- and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 90 A battery
charger
AfterSales
Jul 7, 2021
Page 3 of 19
9
Service
WMA6
ENU
Technical Information
16/21
9900 - PIWIS Tester 3 with test software version 40.200.016 (or higher) installed.
USB storage medium Type A+C 32 GB (for PCM update), Part No. V04014999WW000
•
•
Information
The central computer (PCM) software update is performed using a USB storage medium. The software
version that is specific to each region must be downloaded using the software tool PiUS (Porsche integrated Update Service) and installed on a blank USB storage medium.
Pay particular attention to the following:
•
For this PCM software update, the USB storage medium USB Type A+C 32 GB with the part number
V04014999WW000 must be used.
•
To use the software tool, one blank or re-writable USB storage medium is required for each individual software.
•
The software available in PiUS must only be used in accordance with the instructions provided in a
Technical Information published for this purpose.
The software mentioned here must only be used on the vehicles assigned to the campaign. Damage
to the central computer cannot be ruled out if the software is used on other vehicles.
You will find further information on how to install and use the PiUS software tool in the PPN portal under
*PiUS (Porsche integrated Update Service) goes live*.
Overview of PiUS software versions – PCM update VR12.1.1
Part No.*
Designation
– Region
Vehicle assignment
9J1919360D
PCM update software
– North America
– Mexico
I-no. ER3/ER4
Preparatory work
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.
Jul 7, 2021
Page 4 of 19
AfterSales
Service
Technical Information
16/21
ENU
WMA6
9
•
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.
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).
AfterSales
Jul 7, 2021
Page 5 of 19
9
Service
WMA6
ENU
Technical Information
16/21
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 40.200.016.
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.
Work Procedure: 1
PIWIS Tester data cable
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 the 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. Due to the
long programming time, operate the
PIWIS Testervia the power supply.
Emergency start tray
4
Establish operational readiness (switch on ignition).
5
On the PIWIS Tester start screen, call up the 'Diagnostics' application.
The vehicle type is then read out, the diagnostic application is started and the control unit selection
screen is populated.
Jul 7, 2021
Page 6 of 19
AfterSales
Service
Technical Information
6
16/21
ENU
WMA6
9
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.
Updating software for various control units (VR12.1.1)
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.
Information
The programming sequences used during this campaign include all control units from software release
VR12.1.1. In the programming sequence, the software versions of the individual control units are initially
compared with the required status of software release VR12.1.1. If the actual status already matches,
the programming of the relevant control unit is automatically skipped, and so the scope of the control
units programmed may vary depending on the vehicle.
The individual programming sequences 1 through 4 can be carried out on different days.
Work Procedure: 1
Select the guest account from the central display (PCM) and activate Privacy mode (available in
some countries).
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 carrying out 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:
AfterSales
Jul 7, 2021
Page 7 of 19
9
Service
WMA6
ENU
2
Technical Information
16/21
•
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
•
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
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'.
Information
Special features of sequence 1:
In this sequence, manual intermediate steps are required after the central control unit for assistance
systems (zFAS) is programmed. For safety reasons, the airbag is triggered during a guided
- Advanced VCI Box, Industry-leading J2534 Pass-Thru...
- High-Speed OEM-Level Diagnostics & Programming: Unlock true...
- Coverage for 17 Car Brands & Ultra Reliability: Works...
- User-Friendly RLink Platform & Expert Support: TOPDON’s...
- 6.6 ft USB-C Cable & Portable Storage Case: The RLink J...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: No. 16-21
Replacement Service Bulletin Number:
MFR Communication Date: 2021-07-07
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- Obd2 Bluetooth Scanner Lifetime Update: Ediag Elite offers revolutionary Advantage Lifetime Updates with unlimited access to the superior 15 reset service, bidirectional testing and full system diagnostics.The Ediag Elite is an excellent Bluetooth obd2 scanner diagnostic tool ideal for diy's and private car owners
- Bidirectional Control for Quickly Locating Problems: The Bidirectional Scan tool allows you to send commands directly from your smartphone to your vehicle for active testing. This feature helps to quickly narrow down problems such as air conditioning clutches, windows, doors, sunroofs, etc., reducing diagnostic time for mechanics and helping Diy users locate faults more easily. In addition, Ediag Elite provides fault analysis and repair guidance to help you solve problems efficiently.
- 15 Maintenance Resets: The current version introduces 15 popular special features: Oil Reset, Headlight Matching, Bleeding Reset, TPMS Reset, BMS Reset, Gear Box Relearn, Throttle Learning, Injector Coding, SAS Reset and more special functions in system diagnose menu. These functions make it easy for owners to carry out the necessary maintenance and servicing, ensuring that your vehicle stays in top condition, prolonging its service life and preventing common problems and breakdowns. Note: The Special function vary by model& year, Reach us check compatibility.
- Wide Compatibility CANFD & FCA
Autoauth: Compatible with GM, Ford, Toyota, Chrysler, Honda, Mazda, Nissan, Mitsubishi, Hyundai, KIA with standard OBD2 port from 1996 to newer. More car brands and features will be released gradually. Newest Ediag Elite scanner supports CANFD Protocol and FCA cars. Note: Coverage may vary on different vehicle by model& year ,Please contact us to confirm compatibility before purchase. - Perfect for Monitoring The Health of Your Vehicle: Ediag Elite is designed to make vehicle maintenance simple and efficient. With intelligent AutoVIN quick recognition, it is easy to connect to your car without the need for manual input. Real-time data is visualized in a variety of formats, including graphs, numeric, meter displays and clear 4-in-1 data charts, allowing you to effortlessly monitor real-time data. Data logging/reporting is available for playback and further analysis.
- No Annual Fees & 2026 Upgraded CAN FD: Why pay $199/year or more for updates? The 2026 newest Kingbolen K7 obd2 scanner features have been upgraded to Lifetime Updates without subscription fees, saving you significant costs in the long run. K7 scan tool also adds the CAN FD protocol for the latest GM models (2019+), enabling faster data transfer, reducing the risk of undetected errors
- 2026 Newest Top-tier Car Scanner: Kingbolen K7 diagnostic scan tool is equipped with most capabilities for daily repair/maintenance: Wireless diagnosis via Bluetooth, Bidirectional Test, ECU Online/Offline Code, 31+ Resets, PMI for Ford, Lincoln, Mazda, Global version for 100+ brand vehicles and 17 languages, no area limit, FCA AutoAuth
- OE-Level Full Systems Scan Tool: K7 professional diagnostic scanner with Auto Vin can do one-click to scan ECUs on most of vehicles, like pcm, ecm, eps, bcm, tpms, sas, a/c system... to read/clear code, view live data, freeze frame, read ecu info. 4-in-1 data stream graphics can make data viewing more intuitive. Detailed diagnostic reports will help you easily master the car situation as it can be shared by bluetooth or email! Adding workshop information can help your customers to know more
- Bidirectional Test/Active Test & ECU Code: Stop guessing and start fixing. Bidirectional scan tool Kingbolen K7 can perform real active test that can send commands to the vehicle's ECU to drive the actuators to work, like window, rear mirrors, sunroof, door, solenoids, wipers, headlamp, etc, helping you quickly find out bad parts and pinpoint faulty issues. K7 bidirectional scanner will be a good choice to save money and time on car repairs when performing complex maintenance and repair
- 31 Reset Functions: Avoid expensive dealership visits for simple services. Experience tells us that just a small repair service may cost a lot of money. Kingbolen K7 is a professional diagnostic scanner with 31 common maintenance services like Oil /SAS/EPB/TPMS Reset, Battery Matching, ABS Bleeding, Injector Code, etc. It effectively handles most of the car reset and relearning jobs, perfect for experienced DIYers and mechanics. Note: Functions in the menu vary across vehicles. Kindly check the compatibility before purchase
- 【Lifetime Database & Software Updates— No Subscription Fee, No Feature Lock, Save you $399/Y】KINGBOLEN K8 Pro's software can already be permanently upgraded and used for while software of other same price product still needs annual fee of almost $400. K8 pro scanner has packed all capabilities auto technicians would ever need for repair & maintenance services: Added CAN-FD & DOIP protocol, Bluetooth Wireless Diagnosis, Bidirectional Test, ECU Online/Offline Code & Guided Functions for VW, for Audi...34+ Restes, Autoauth for FCA SGW, Larger 4GB+64GB memory, 12600mAh battery, 8'' touch screen with 1280 * 800 Resolution. A Kickstand can allow the tablet to sit at a comfortable angle
- 【Newly Added CAN FD & DOIP Protocol】As Upgrade Version of Kingbolen K8, K8 Pro obd2 scanner supports CANFD and DOIP protocol, which will save you 200+ bucks as no need extra buy for special adapter. CANFD protocol suits for the latest GM(2019-), reducing the risk of undetected errors. The DoIP protocol (comes with DoIp cable) fits for 2017+ BMW(F&G chassis), for Jaguar & Land Rover after 2017, for Volvo after 2018. Plus, K8 Pro's Memory from 2G+32G expanded to 4G+64G, update period extended from 2 years to permanent
- 【34+ Hot Special Functions & V.A.G Guide】KINGBOLEN K8 pro bluetooth obd2 scanner covers almost all common services including Oil Reset, EPB, SAS, BMS Reset, ABS bleed, Throttle Reset, Suspension, Injector Code, Power Balance, Transmission Adaptation, Fuel Trim Learn, HVAC Control Module Calibrate, Language Change, A/F Settings, Stop/Start Reset, Crankshaft Sensor Relearn, TPMS, PMI function and etc. Imagine how much money and time you spend on car maintenance every year? K8 pro car scanner will be a good helper and saver for your car. V.A.G Guided function provides step-by-step guide to work for Volkswagen/Audi/Skoda. Note: Please send us model/year/vin to check compatibility before order
- 【Powerful Bidirectional Test/Active Test & ECU Code】As a bidirectional scan tool, KINGBOLEN K8 pro allows you to request information from a vehicle's ECU or send commands to the vehicle's modules to perform specific tests and functions, such as EVAP Tests, Turn on/off radiator fan, Window/Mirror/Door Lock Test, Pump and Value Tests, Sound horn Test, et. Without using the vehicle control system and dismantling car’s parts, it can quickly and accurately pinpoint the fault causes, simple operation saves time and money
- 【Wireless OE-Level All Systems Diagnostics】Equipped with Bluetooth VCI, you can do car diagnostics out of the car (up to 33F/10M) without being confined to a small space inside the car. Provides the convenience of Auto VIN, K8 pro allowing for easy access and diagnosis of all available modules on a wide range of vehicles, like PCM, ECM, BCM, TPMS, SAS, Fuel System, etc, to perform read/clear codes, view live data, freeze frame, perform active tests, and read ECU info... 12-In-1 Data Stream Graphics make data viewing more intuitive.Diagnostic reports can be shared via QR Code, Bluetooth or email.Built-in Browser and Fault Code Library allows you directly query the fault code when diagnosing
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.