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APA5

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APA5 - Re-Programming Instrument Cluster (Recall 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 2023

Model Line:

Taycan (Y1A/Y1B)

Concerns:

Instrument cluster control unit

Cause:

Due to a software error in the instrument cluster on affected vehicles, the brake wear symbol is
not displayed in accordance with local legal requirements.
The brake wear symbol is displayed in the instrument cluster in the wrong warning light variant and in the
wrong color.

Action:

Re-program instrument cluster using an updated data record.
Information
Every vehicle is assigned to exactly one campaign scope.
To find out which scope is assigned to the vehicle, see PCSS Vehicle Information.

Affected
Vehicles:

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

Required tools
Tool:

•
•

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

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Re-programming instrument cluster - Scope 1
Information
As part of the network update to VR19.0.1 (campaigns ANA6, WNJ8 and WNK1), the instrument cluster
control unit is programmed to target software version 0663. As a result, no further action is required
through campaign APA2.
After implementing campaign ANA6, WNJ8 or WNK1, APA2 in Scope 2 is to be marked as completed.
1

Carry out APA2 campaign. Invoice the costs incurred via the APA2 campaign.

2

Enter the campaign in the Warranty and Maintenance logbook.

Re-programming instrument cluster - Scope 2
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:

41.900.040 (or higher)

Type of control unit programming:

Control unit programming using the “Automatic
programming” function of the instrument cluster
control unit.

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 once the
programming and coding is complete.

Programming time (approx.):

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28 minutes

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Instrument cluster control unit: 0663

Software version programmed during this
campaign:

•

Procedure in the event of error messages
appearing during the programming sequence:

 Workshop Manual '9X00IN Basic instructions

Procedure in the event of a termination in the
control unit programming:

Repeat control unit programming by restarting
programming.

2

3

Following control unit programming, the software
release can be read out from the relevant control
unit in the “Incremented identifications” menu using
the PIWIS Tester.

and procedure for control unit programming using
the PIWIS Tester'.

Read out and delete all control unit error memories.
2.1

In the control unit selection (‘Overview menu’) press •F7“ to call up the Additional menu.

2.2

Select the function “Read all error memories and delete if necessary” and press •F12“
(“Next”) to confirm.

Enter the campaign in the Warranty and Maintenance logbook.

Warranty processing
Information
The specified labor time was determined specifically for carrying out this campaign and includes all
necessary preliminary and subsequent rework.
The labor time may differ from the working times published in the Labor Times in the PCSS.
Scope 1:

Re-programming instrument cluster
•

Only valid for vehicles for which recall campaign APA2 has not yet been carried out.
Labor time:
Re-programming instrument cluster
Includes:
Operation test
Complete Warranty and Maintenance logbook

Labor time: 26 TU

 Damage number APA5 099 000 1

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Scope 2:

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Re-programming instrument cluster
Labor time:
Re-programming instrument cluster
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and erasing fault memories

Labor time: 89 TU

 Damage number APA5 099 000 1

Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.

© 2023 Porsche Cars North America, Inc.

Jun 21, 2023
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