NHTSA ID Number: 11007089
Manufacturer Communication Number: No. 124-24
TSB/Document Date: 2024-09-05
Summary
Technical information for the homelink garage door opener - learning process not feasible: recoding front end electronics
Service
Technical Information
124/24 ENU
9152
9
HomeLink Garage Door Opener - Learning Process not Feasible: Re-Coding Front-End
Electronics (BCM1) Control Unit (124/24)
Revision:
This bulletin replaces bulletin ATI Group 9 2418.1, dated July 29, 2024.
Model Year:
As of 2020 up to 2024
Model Line:
Taycan (Y1A / Y1B / Y1C)
Equipment:
HomeLink garage door opener (M-no. VC2)
Concerns:
Central computer
Information:
The customer complains that the teaching process for a garage door cannot be completed
successfully.
During the teaching process for the garage door, a memory space in the form of a memory button on
the mirror is queried in the central display of the PCM control unit. However, this memory button is not
available on Taycan vehicles from model years 2020 – 2024.
Cause:
Previous faulty coding of the front-end electronics control unit (BCM1) caused by the PIWIS Tester can
cause this fault pattern.
Action:
Re-code the front-end electronics control unit (BCM1) using the PIWIS Tester if there is a customer
complaint.
Information
The minimum requirement for coding is the PIWIS Tester software release 42.800.020 (or higher)
Required Tools
Tools:
•
•
P90999 - PIWIS Tester 4
Battery charger with a current rating of at least 90 A and a current and voltage-controlled
charge map for lithium starter batteries, e.g. VAS 5908 - battery charger 90A. For further
information about the battery chargers to be used, see the corresponding Workshop Manual.
Workshop Manual '270689 Charging battery and vehicle electrical system'
AfterSales
Aug 21, 2024
Page 1 of 3
9
Service
Technical Information
ENU 124/24
9152
Re-coding front-end electronics (BCM1) control unit
Work Procedure: 1
Connect and switch on the battery charger.
Workshop Manual '270689 Charging battery/vehicle electrical system'
2
Place the original remote control in the emergency start tray.
3
Connect the P90999 - PIWIS Tester 4, switch on ignition and start the diagnostic application.
4
Re-code front-end electronics (BCM1) control unit.
The basic procedure to be followed for coding the control unit is described in the Workshop Manual:
Workshop Manual '270689 Basic instructions and procedure for control unit programming using
the PIWIS Tester'
Specific information on control unit coding in the context of this Technical Information:
Required PIWIS Tester software release:
42.800.020 (or higher)
Type of control unit coding:
Control unit coding using the ‘Automatic coding’
function for the control unit:
‘Front-end electronics’ (BCM1) control unit –
‘Coding/programming’ menu – ‘Automatic
coding’ function.
Read and follow the information and instructions
on the PIWIS Tester during the guided coding
sequence.
Coding sequence:
Do not interrupt the coding process.
When coding is complete, the message “Coding has
been completed successfully” is displayed and a tick
appears in the ‘Status’ box.
Procedure if control unit coding is not
successful:
5
6
Repeat control unit coding.
Exit the diagnostic application. Switch off ignition. Disconnect P90999 - PIWIS Tester 4 from the
vehicle.
Switch off and disconnect the battery charger.
Workshop Manual '270689 Charging battery/vehicle electrical system'
Aug 21, 2024
Page 2 of 3
AfterSales
Service
Technical Information
124/24 ENU
9152
9
Labor position and PCSS encryption
Labor position:
I No.
APOS
Labor operation
94492540
Programming control unit for front-end electronics
PCSS encryption:
Location (FES5)
91520
Central computer
Damage type (SA4)
1134
programming error
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.
© 2024 Porsche Cars North America, Inc.
AfterSales
Aug 21, 2024
Page 3 of 3
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TSB/Document ID: No. 124-24
Replacement Service Bulletin Number:
MFR Communication Date: 2024-08-21
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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