NHTSA ID Number: 10200892
Manufacturer Communication Number: No. 89-21
TSB/Document Date: 2021-09-02
Summary
Instructions on how to Re-Program the Instrument Cluster Control Unit in the event that the instrument cluster is temporarily black.
Service
Technical Information
89/21
ENU
9025
9
Complaint – Instrument Cluster Temporarily Black: Re-Programming Instrument Cluster
Control Unit (89/21)
Model Line:
Taycan (Y1A)
Model Year:
As of 2020
Concerns:
Instrument cluster control unit
Information:
The customer complains about the instrument cluster screen briefly turning black and then restarting.
This may be caused by defective software in the instrument cluster.
Action required: In the event of a customer complaint, re-program the instrument cluster control unit using the relevant
programming code.
Information
The total time required for control unit programming is approx. 15 minutes.
Required tools
Information
The Taycan is equipped as standard with a lithium starter battery, which must only be charged using
suitable battery chargers.
For further information about the battery chargers to be used, see:
Workshop Manual '2706IN General information on the 12-volt lithium-ion battery'
Workshop Manual '270689 Charging battery/vehicle electrical system'
Tools:
•
•
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 90 A
9900 - PIWIS Tester 3 with PIWIS Tester software version 40.200.010 (or higher) installed
Preparatory work
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.
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89/21
Keep third parties away from the danger area.
Do not move components or tools into the danger area.
Retract roll-up sun blinds on the rear side windows before starting programming or coding.
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.
Place the driver's key with the back facing down into the front left storage compartment in the center
console to guarantee a continuous radio link between the vehicle and the driver's key.
Work Procedure: 1
Place the driver's key with the back facing down
into the front left storage compartment in the center
console (emergency start tray) to guarantee a
continuous radio link between the vehicle and the
driver's key Emergency start tray.
2
Carry out general preliminary work for control unit
programming as described in Workshop Manual
'9X00IN Basic instructions and procedure for control
unit programming - section on "Preliminary work"'.
Emergency start tray
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Re-programming instrument cluster control unit
NOTICE
Use of a PIWIS Tester software version that is older than the prescribed version.
•
Measure is ineffective
Always use the prescribed version or a higher version of the PIWIS Tester software for control unit
programming and coding.
1
The basic procedure for programming a control unit is described in the Workshop Manual
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming - section
on "Programming"'.
Specific information on control unit programming in the context of this Technical Information:
Information
The following source software version for the instrument cluster control unit is required for the control unit
programming described here: 0595.
For the source software, open programming campaigns may have to be performed.
Required PIWIS Tester software version:
40.200.010 (or higher)
Type of control unit programming:
Control unit programming using the 'Campaign'
function in the Additional menu on the PIWIS Tester
by entering a programming code.
Programming code:
B4L6T
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided programming
sequence.
During the programming sequence, the instrument
cluster control unit is re-programmed and then automatically re-coded.
Do not interrupt programming.
Programming time (approx.):
15 minutes
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Software version for the instrument
cluster control unit programmed during
programming:
The software version information in the
programmed data record is based on the
specified PIWIS Tester software version.
Please note that this may have changed in a
higher version.
0598
Following control unit programming, the software
version can be read out of the instrument cluster
control unit in the 'Extended identifications' menu
using the PIWIS Tester.
Procedure in the event of error messages
appearing during the programming
sequence:
Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming - section on
"Fault finding"'.
Procedure in the event of abnormal termination of control unit programming:
Repeat control unit programming by restarting
programming.
2
Commission component protection.
For instructions, see:
Workshop Manual '903555 Replacing Gateway control unit'
Concluding work
Work Procedure: 1
Carry out general subsequent work for control unit programming as described in Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming using the PIWIS
Tester - section on "Subsequent work"'.
Invoicing
Invoicing:
For documentation and warranty invoicing, enter the labor operations and PQIS coding specified below in
the warranty claim:
APOS
Labor operation
90252590
Programming instrument clusters
I No.
PQIS coding:
Location (FES5)
90250
Instrument cluster
Damage type (SA4)
1614
Function not as specified
References:
Technical Information '9X00IN WMA5 Workshop campaign - Updating software for various control
units'
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Service
Technical Information
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Technical Information '9X00IN WMA6 Workshop campaign - Updating software for various control
units'
Workshop Manual '2706IN General information on the 12-volt lithium-ion battery'
Workshop Manual '270689 Charging battery/vehicle electrical system'
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester'
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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TSB/Document ID: No. 89-21
Replacement Service Bulletin Number:
MFR Communication Date: 2021-08-25
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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