Service

Technical Information

152/23 ENU

APB2

2

APB2 – Checking High-Volt Battery and Replacing if Necessary (Stop Delivery / Recall
Campaign)
Revision:

This bulletin replaces bulletin Group 2 152/23 APB2, dated December 6, 2023.

Model Year:

As of 2020 up to 2023

Model Line:

Taycan (Y1A / Y1B / Y1C)

Concerns:

High-volt battery

Cause:

It could happen that under certain circumstances the seal between the battery casing and
battery cover on the high-volt battery on the affected vehicles is not sufficiently robust and
does not, therefore, reliably seal over the lifetime of the vehicle.
In the case of an insufficiently robust seal, under certain circumstances, liquid could penetrate inside the
high-volt battery over time.
If a conductive liquid entering the battery exceeds a certain limit value, the insulating resistance
decreases. If the insulating resistance falls below a defined limit value over time, a yellow warning
message is displayed in the vehicle.
If the insulating resistance continues to fall below a defined limit value in the course of time, a red warning
message is displayed in the vehicle.
If customers do not contact a Porsche Center despite a red warning message in the vehicle, and a
sufficient amount of conductive liquid has accumulated in the high-volt battery, electric arcs could build
up that could heighten the risk of a thermal event.

Action:

Check high-volt battery and replace it depending on the test result.

Information
Every vehicle is assigned exactly one campaign scope.
 To find out which scope is assigned to the relevant vehicle, see PCSS Vehicle Information.
Affected
Vehicles:

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

AfterSales

Jan 23, 2024
Page 1 of 21

2

Service

Technical Information

ENU 152/23

APB2

Required parts
Information
A new pressure release valve must only be installed if the high-voltage battery is not replaced.
If a new high-voltage battery is installed as part of this campaign, it is not necessary to replace the
pressure release valve.

Parts Info:

Part No.

Designation
− Location

Number

V04015007AP

 Pressure valve

1 piece

N 10700201

 Internal hexagon round-head bolt
– Pressure valve

4 pieces

Additional parts required for vehicles with PDCC
(M-No. 1P7):
N 91006202

 Hexagon-head bolt
– Anti-roll bar PDCC, front

4 pieces

Required tools
Tools:

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

Jan 23, 2024
Page 2 of 21

T40262 - Locking cap
VAS 6558A - High-voltage testing module
VAS 6558A - /9–6A high-voltage test adapter
VAS 6883A - Insulated tool set
VAS 5581A - Diagnostic Box
VAS 6884 - High-voltage cordon
VAS 6911/3B - Test plug set
9925 - Leak-tightness test set
9925/1 - Adapter cable
V.A.G 1274B - Cooling system tester
V.A.G 1397B - Pressure sensor
P90999 - P90999 - PIWIS Tester 4 with PIWIS Tester test software release 42.250.030 (or
higher)
Battery charger with a current rating of at least 90 A, e.g.VAS 5908 - battery charger 90 A
VAS 6931 - Transmission and gearbox jack
Torque wrench, 2-10 Nm (1.5-7.5 ftlb.), e.g. V.A.G 1783 - torque wrench, 2-10 Nm (1.5-7.5
ftlb.)
Torque wrench, 6-50 Nm (4.5-37 ftlb.), e.g. V.A.G 1331A - torque wrench, 6-50 Nm (4.5-37
ftlb.)

AfterSales

Service

Technical Information

152/23 ENU

APB2

2

Information
Auto-ship WNW3 campaign tool
Special test adapters (one adapter plate and one adapter plug each) are required to check the
high-voltage battery for leaks.
One PNAWNW3KIT kit will be auto-shipped to every dealer and service center by PCNA. Additional kits
are available to order through Polaris.
Required test adapter - Set:
•

Adapter plate

Adapter plate
•

Adapter plug

Adapter plug

AfterSales

Jan 23, 2024
Page 3 of 21

2

Service

Technical Information

ENU 152/23

APB2

Preliminary work
WARNING
Incorrect handling of high-voltage components
•

Electric shock

•

Short circuit

•

Fire

•

Explosion



Only appropriately trained and authorized persons are permitted to work on high-voltage vehicles and
components.



Required qualification: High voltage technician or high voltage expert.



Observe national requirements and legislation for this work.



Always use insulated tools, e.g. VAS 6883 Insulated Tool Set when working on these components.



Observe general warning notes for working on the high-voltage system.  Workshop Manual '2X00IN
General warning notes for working on the high-voltage system'

Work Procedure: 1

2

Observe general warning notices for working on the high-voltage system.
 Workshop Manual '2X00IN General warning notes for working on the high-voltage system'
Classify lithium-ion battery.

 Workshop Manual '2X00IN Classification of lithium-ion battery'
3

4

Open the door-window on the driver’s side. Open vehicle front flap and rear luggage compartment
and secure against unintentional closing.
Isolate the high-voltage system from the power supply.

 Workshop Manual '2X00IN Activate/Start high-voltage system'
5

Remove (center) luggage compartment trim panel luggage compartment cover.

 Workshop Manual '70061900 Remove and install (centre) luggage compartment trim panel
(luggage compartment cover)'
6

Jan 23, 2024
Page 4 of 21

Remove insulating mat.
6.1

Loosen plastic clips at the corners of the insulating mat.

6.2

Remove insulating mat.

AfterSales

Service

Technical Information

152/23 ENU

APB2

2

Checking high-volt battery
Work Procedure: 1

Lift up body cover  Removing body cover -1- in
the luggage compartment to allow access to the
high-voltage line for the electric machine at the rear
using a plastic wedge and remove it.

Removing body cover
2

Unscrew screws  High-voltage line for rear electric
machine -1- for high-voltage line connection for
electric machine at the rear and disconnect electric
plug connection from electric machine at the rear.

High-voltage line for rear electric machine
3

Remove Styrofoam element  Removing Styrofoam
element -1-.
3.1

Undo clips  Removing Styrofoam element
-2-.

3.2

Carefully pull Styrofoam element 
Removing Styrofoam element -1- upwards.

Removing Styrofoam element

AfterSales

Jan 23, 2024
Page 5 of 21

2

Service

Technical Information

ENU 152/23

APB2

Information
The pressure release valve and fastening screws cannot be reused and must be replaced.
Before assembling the adapter plate (before the
pressure test) and before assembling the pressure
valve (after performing the pressure test), the frame
of the high-voltage battery must be cleaned with
isopropanol in the contact surface area of the seal.

Pressure valve
4

Remove pressure valve  Pressure valve -2-.
4.1

Unscrew screws  Pressure valve -1-.

4.2

Disconnect pressure valve  Pressure valve
-2-.

Pressure valve
5

Install adapter plate  Adapter plate on high-volt
battery -2-.
5.1

Clean sealing surface on high-volt battery with
isopropanol.

5.2

Attach adapter plate  Adapter plate on
high-volt battery -2-.

5.3

Screw in screws  Adapter plate on high-volt
battery -1- and tighten with tightening
torque 8 Nm (5.9 ftlb.).
Adapter plate on high-volt battery

Jan 23, 2024
Page 6 of 21

AfterSales

Service

Technical Information
6

7

152/23 ENU

APB2

2

Connect adapter plug  Adapter plug on
high-voltage line -2-.
6.1

Connect adapter plug  Adapter plug on
high-voltage line -2- to high-voltage line.

6.2

Screw in screws  Adapter plug on
high-voltage line -1- by hand.

Remove front axle support (rear section).

 Workshop Manual '400819 Removing and
installing front axle support (rear section)'
8

Adapter plug on high-voltage line
For vehicles with PDCC, release front anti-roll bar and
secure it in place at a suitable position with tie-wraps.
The front anti-roll bar coupling rods do not need to be loosened.
For instructions, see:  Workshop Manual '407709 Loosening and securing front anti-roll bar
(PDCC)'

9

Unclip coolant pipes  Loosening coolant pipes -1from bracket  Loosening coolant pipes -2- and 
Loosening coolant pipes -Arrow- slide them to the
side.