Service

Technical Information

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AMC1 - Hazard Warning Lamp – Automatic Activation Re-Programming (Stop
Delivery/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 2022

Model Line:

Taycan (Y1A/Y1B)

Market:

USA (C02)/Canada (C36)

Concerns:

Hazard Warning Lamp Coding

Information:

The affected vehicles were programmed with incorrect coding parameters and as a result, the
hazard warning lights can come on automatically in certain driving situations.
This behavior is part of a certain driver assistance function in various markets, but is not permitted in
accordance with local US regulations.

Action required: Re-code the airbag control unit using the PIWIS Tester with software version 40.550.050 (or higher)
installed.
Affected
Vehicles:

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

Required tools
Information
The Taycan (Y1A/Y1B) 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:

•

Battery charger with a current rating of at least 90 A and also with a current and voltagecontrolled charge map for lithium starter batteries, e.g. VAS 5908 battery charger 90 A

•

9900 - PIWIS Tester 3 with software version 40.550.050 (or higher) installed.

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Re-coding airbag control unit
NOTICE
Fault entry in the fault memory and control unit programming aborted due to undervoltage.
•

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 WiFi connection is unstable.
•

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
•

If the driver's key is not recognized in the vehicle, programming cannot be started or will be interrupted.



Position the driver's key with the back facing forward upright between the holding struts in the rear
cupholder (emergency start tray) to ensure a permanent radio link between the vehicle and remote
control.
NOTICE

Programming interrupted
•

Malfunctions in control unit

•

Risk of damage to control unit



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.

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Technical Information

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Information
The procedure described here is based on the PIWIS Tester 3 software version 40.550.050.
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.
Work Procedure: 1

Position the vehicle on a level surface.
Information
To ensure that the inclination sensor can detect the zero position, the vehicle must be positioned on
its own wheels and a flat surface (max. 3 ° inclination) during coding of the airbag control unit.

2

Re-code airbag control unit.

WARNING
Electrically moved side windows and rear spoiler
•

Danger of limbs being trapped or severed

•

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.
Required PIWIS Tester software version:

40.550.050 (or higher)

Type of control unit coding:

Control unit coding using the 'Campaign'
function in the Additional menu on the PIWIS
Tester by entering a programming code.

Programming code:

Z8K5V

Coding sequence:

Read and follow the information and
instructions on the PIWIS Tester during the
guided procedure.
Do not interrupt coding.
When coding is complete, the message “Coding
has been completed successfully” is displayed
and a tick appears in the 'Status' box.

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Coding time (approx.):

6 minutes

Procedure in the event of abnormal termination of control unit coding:

Repeat control unit coding by starting the coding
procedure again.  Workshop Manual '9X00IN
Basic instructions and procedure for control unit
programming using the PIWIS Tester - section on
"Fault finding"'

Read out all fault memories and check and delete any existing fault memory entries.
For instructions, see  Workshop Manual '033500 Fault memory for on-board diagnosis'.
Information
If control units are found to have faults that are not caused by control unit coding, these must first be
found and corrected. This work cannot be invoiced under the workshop campaign number.

4

Enter the campaign in the Warranty and Maintenance booklet.

Warranty processing
Information
The specified working times were determined specifically for carrying out this campaign and include all
required preliminary and subsequent work.
The working times may differ from the working times published in the Labor Operation List in PCSS.
Scope 1:

For vehicles that have not been delivered, which were assigned to a Stop Sale campaign.
Working time:
Re-coding airbag control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and erasing fault memories
 Damage Code AMC1 099 000 1

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Labor time: 39 TU

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Technical Information
Scope 2:

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Vehicles that have already been delivered.
Working time:
Re-coding airbag control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and erasing fault memories

Labor time: 55 TU

 Damage Code AMC1 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.

© 2021 Porsche Cars North America, Inc.

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