Service

Technical Information

200/24 ENU WRS1

WRS1 - Checking High-Voltage Battery and Replacing Cell Block Module if necessary (Workshop
Campaign)
Revision:

Version

Date

Change

0

12/04/2024

•

First publication

1

04/17/2025

•

Update of Action

2

Model Year:

As of 2020 up to 2024

Model Line:

Taycan (Y1A / Y1B / Y1C)

Concerns:

High-voltage battery

Cause:

The required, optimised software for the high-voltage battery control unit as part of ARB6/ARB7/WRS0 is
currently not available to update all affected vehicles immediately. Therefore, a check of the battery status
using an interim action is necessary until this on-board diagnostics software is available.
As part of the interim action, a vehicle analysis log (VAL) is created at the workshop visit for offline vehicles
without activated online functions and corresponding data transmission in order to analyse cell modules
based on the VAL data analysis. Valid (complete) workshop and OTA VALs are taken into account for the evaluation.

Action:

Check cell modules via vehicle analysis log (PCSS).
•
•
•

Population 1 – customer vehicles with an existing, valid VAL – create 1x VAL (scope 1)
Population 2 – customer vehicles without an existing, valid VAL – create 3x VAL (scope 2)
Population 3 – new vehicles without an existing, valid VAL – create 3x VAL (scope 3)

Information
An evaluation of the state of the module cell block of the Affected Vehicles is carried out by the PAG internal
analysis of the VALs.
On the basis of the transmitted VALs, PAG evaluates the state of the module cell block for the respective
vehicle by using an analysis algorithm.
The analysis result and the necessary further steps for each vehicle are displayed in the PCSS approx.
30-45 minutes after the VAL has been uploaded.
Please also note the following information:
•

Customer is contacted by the relevant Porsche Centre or by the importer using the ARB6 customer
letter.

•

Customer arranges an appointment with the Porsche Centre for carrying out campaign ARB6.

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Technical Information

ENU 200/24

WRS1
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In the event of a negative test result, the assignment to the affected scope of the recall campaign
ARB5 and the accompanying campaigns "Replacing module cell block" takes place once a day and is
also displayed in the PCSS.

•

In the event of a positive test result (no conspicuous modules), the interim action is completed and the
warranty invoicing is made via the campaign number WRS1 under scopes 1-3. The ARB6 campaign
remains open after performing the WRS1 until the final on-board diagnostics is available (Q1/2025).
The vehicle can then be handed over to the customer.

•

This test (WRS1) is valid for 60 days.

•

If the software is not available, the high-voltage battery must be rechecked every 60 days at the latest.
A renewed workshop campaign similar to WRS1 will be published in good time for processing.

•

As soon as the software is available, the final action (Q1/2025) must be carried out in accordance with
the ARB6 recall campaign.

•

When the software or the on-board diagnostics is available, the WRS1 campaign is deactivated or
closed.

Please encourage customers to bring their vehicles "Online" so that their HV Battery can be continuously
monitored via ARB7 campaign.
To allow remote monitoring, you must have the My Porsche app on your smartphone and deactivate Privacy
Mode in your vehicle’s PCM. To do this, the customer will need to complete the following items:
In-App via Smartphone: If not done so already, customer must complete registration in the MyPorsche app.
In-Car: Customer will need to deactivate Privacy Mode, be signed in as the main user in the vehicle, and the
vehicle will need an active data connection.
Affected
Vehicles:

Only vehicles assigned to the campaign (see also PCSS Vehicle Information).

Required tools
Tools:

•
•

Battery charger with a current rating of at least 90 A, e.g., VAS 5908 battery charger 90 A
P90999 - P90999 - PIWIS Tester 4

Checking high-voltage battery – population 1 (customer vehicles with an existing, valid VAL)
Work
Procedure:

Review high-voltage battery flow chart
Creating Vehicle Analysis Log (VAL) in workshop
Upload VAL via the data return function
↓
VAL is analyzed within 30-45 minutes.
Reply to PAG about analysis result via PCSS display in the “Campaigns” area by pressing
the “battery with magnifying glass” icon symbol (see table on PCSS menu prompt).
↓

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Technical Information

200/24 ENU WRS1
OK
↓

2

Not OK
↓

End of action
Invoicing for Scope 1
If the final action "Re-programming ARB6 BMCe
software" is not available, the high-voltage
battery must be rechecked by means of a VAL
test after 60 days at the latest.

Invoicing for VAL check via WRS1 scope 1.
Replacing module via ARB5 recall/ and accompanying campaigns “Replacing cell block module”
Please submit the warranty claim for the campaign
in WWS via the assigned scope.
After replacing module:
If the final action "Re-programming ARB6 BMCe
software" is not available, the high-voltage
battery must be rechecked by means of a VAL
test after 60 days at the latest.

1

Open the front cover and connect a suitable battery charger, e.g., 90 A battery charger, to the
jump-start terminals and switch it on.

2

Open the door and position the driver’s key with the
back facing forward upright between the holding strips
in the rear drinks holder (emergency start tray) to
ensure a permanent radio link between the vehicle and
remote control.

3

Establish readiness for operation (switch on ignition).

Information
An active Internet connection with the PIWIS Tester must
be ensured. To log in using the PIWIS Tester, the technician
is required.
The PIWIS Tester must not be charged using the cigarette lighter!

Emergency start tray

4

Connect the PIWIS Tester to the vehicle communication module (VCI) via the USB cable. Then connect
the communication module to the vehicle and switch on the PIWIS Tester.

5

Create a Vehicle Analysis Log (VAL).
Mark the Vehicle Analysis Log you have just created with the attribute “Extra VAL” and return it using the
PIWIS Tester after completion.

Feedback on analysis results by PAG takes place via PCSS after approx. 30-45 minutes.
•

The data analysis yields a positive result (green PCSS display): The vehicle can then be handed over to
the customer. Continue to Warranty Processing, Scope 1.

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WRS1
•
•

The data analysis yields a negative result (red PCSS display): In rare cases, it may be necessary to
replace the cell block module. If this is the case, the VIN in the ARB5 campaign is transferred to one of
the accompanying campaigns.
VAL faulty/insufficient (yellow or grey PCSS display): In very rare cases, additional VALs may be
required.
PCSS menu prompt

Illustration

1. Vehicle search via VIN

PCSS vehicle search
2. Confirming “Battery with magnifying glass” icon
under campaigns in WRS1

Display of campaign in PCSS

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200/24 ENU WRS1

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3. VAL analysis result is displayed via pop-up
window

Pop-up display window
- Green indicator: The test result is “positive”. Cell
modules are OK.

"Green" display result
- Yellow indicator: A Vehicle Analysis Log (VAL)
must be created

"Yellow" display result

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Technical Information