NHTSA ID Number: 10173084
Manufacturer Communication Number: 122-L7U2K-04
TSB/Document Date: 2020-04-02
Summary
Workshop campaign instructions for campaign WLC5, which seeks to update the software for various control units on affected vehicles.
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WLC5 - 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:
2020
Model line:
Taycan (Y1A)
Subject:
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Information:
Software optimizations for various control units are available for the Taycan.
With these software optimizations, various improvements are implemented in the vehicle.
Over-the-air (OTA) control unit
Control unit for high-voltage power electronics, front and rear
Control unit for high-voltage charger (OBC)
High-voltage battery
control unit (BMCe)
Control unit for chassis control (PASM)
Air-conditioning system regulator control unit, rear
Instrument cluster
Porsche Communication Management (PCM) control unit
Thermal management (TME)
Roll stabilisation (PDCC)
Brake electronics (PSM)
Headlight, left and right
Rear-end electronics (BCM2)
Information
Before carrying out this campaign, check whether other campaigns must be carried out on the relevant
vehicles. On vehicles affected by campaign WLB3 as well as this campaign, always make sure that
campaign WLB3 has already been carried out before carrying out this campaign, when possible. In
urgent or escalated cases, for example, if the required parts for campaign WLB3 are not yet or not
sufficiently available, WLC5 can still be carried out.
For these cases please ensure the following points are observed:
1) Always connect the terminal clip of the negative cable vertically from above to the ground point for the
external power connection.
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2) Make sure that the negative cable of the terminal clip is laid without any tension to prevent the terminal
clip from tilting sideways at the ground point.
3) When connecting the terminal clips, make sure that there is sufficient distance to peripheral parts (e.g.
pneumatic supply line for air spring strut).
4) Before the vehicle is lifted with a lifting platform, always disconnect the external battery charger
completely from the vehicle to avoid that the power supply wire of the terminal clip will get under tension
and as a result may tilt sideways at the ground point.
Remedial
Action:
Update the software for the following control units using the PIWIS Tester with test software version
39.200.031 or USB storage medium. For details of affected control units, see overview below.
Update via
Control unit
Programming time
Combined software update of various
control units
approx. 120 minutes
Includes:
Programming and coding
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Over-the-air (OTA) control unit
Control unit for high-voltage
power electronics, front and
rear
Control unit for high-voltage
charger (OBC)
High-voltage battery control
unit (BMCe)
Control unit for chassis control
(PASM)
Air-conditioning system
regulator control unit, rear
Instrument cluster
Only for coding
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Porsche Communication
Management (PCM) control
unit
Thermal management (TME)
Roll stabilisation (PDCC)
Brake electronics (PSM)
Headlight, left and right
AfterSales
USB
storage
medium
PIWIS
Tester
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Rear-end electronics (BCM2)
Porsche Communication Management
(PCM) control unit
approx. 30 minutes
An overview of the new features that will be included with the software update can be found in the
Appendix under Technical Information 'Overview of new features provided by the software update'.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information). There are 698 vehicles
affected by this campaign in North America.
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:
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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. VAS5908 / battery charger
90 A
9900 - PIWIS Tester 3 with test software version 39.200.031
USB storage medium Type A+C 32 GB (for PCM update), Part No. V04014999WW000
Information
The PCM control unit 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:
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For this PCM software update, the USB storage medium USB Type A+C 32 GB with the part number
V04014999WW000 must be used.
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To use the software tool, one blank or re-writable USB storage medium is required for each individual software update.
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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 control unit cannot be ruled out if the software is used on other vehicles.
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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
Part No.
Designation
– Region
Vehicle assignment
9J1919360A
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 low voltage.
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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 WLAN connection is unstable.
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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
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If the driver's key is not recognized in the vehicle, programming cannot be started or will be interrupted.
Place 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.
NOTICE
Programming interrupted
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Malfunctions in control unit
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Risk of damage to control unit
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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
The procedure described here is based on the PIWIS Tester 3 software version 39.200.031.
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.
Information
If there are faults in the control units, these must first be found and corrected. This work cannot be
invoiced under the workshop campaign number.
Work Procedure: 1
Connect a suitable battery charger, e.g. VAS5908 / battery charger 90 A, 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 -arrow-.
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, connect the
PIWIS Testerto the power supply during the
operation.
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Information
Use the new PIWIS Tester data cable for carrying out
the campaign. The difference between the old
PIWIS Tester data cable -1- and new PIWIS Tester
data cable -2- data 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. F. Porsche AG
> Aftersales > Workshop > PIWIS > Documents).
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.
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.
Updating software for various control units
WARNING
Electrically moved side windows and rear spoiler
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Danger of limbs being trapped or severed
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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.
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PIWIS Tester data cable
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Information
If fault memory entries for individual control units cannot be deleted, proceed as follows:
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End operational readiness (switch off ignition).
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Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.
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Lock the vehicle using the driver's key and remove the driver's key from the proximity of the vehicle
(approx. 10 meter).
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Wait approx. 5 minutes before unlocking the vehicle again.
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Restore operational readiness (switch on ignition).
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Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore communication with the vehicle.
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Read out the fault memory again and delete any fault memory entries that are stored.
Work Procedure: 1
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 during this campaign, see the table
below:
Required PIWIS Tester software version:
39.200.031 (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:
P5P8E
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
Do not interrupt programming and coding.
A backup documentation process for the
re-programmed software versions starts as soon as
programming and coding is complete.
Programming time (approx):
approx. 120 minutes
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Software versions programmed during
this campaign:
- Advanced VCI Box, Industry-leading J2534 Pass-Thru...
- High-Speed OEM-Level Diagnostics & Programming: Unlock true...
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- User-Friendly RLink Platform & Expert Support: TOPDON’s...
- 6.6 ft USB-C Cable & Portable Storage Case: The RLink J...
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TSB/Document ID: 122-L7U2K-04
Replacement Service Bulletin Number:
MFR Communication Date: 2020-03-23
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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