time, end operational readiness for
approx. 15 minutes (switch off ignition)
and repeat the procedure described
here again.
In the case of further aborts, the
subsequent work must be successively
carried out manually.

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

Establish bus idle for at least 15 minutes.
4.1

End operational readiness (switch off ignition).

4.2

Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.

4.3

Lock the vehicle using the driver's key and remove the driver's key from the proximity of the
vehicle (approx. 10 metres).

4.4

Unlock the vehicle again after waiting for at least 15 minutes.

4.5

Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore
communication with the vehicle.

Teach steering lock settings.

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5.1

Select the power steering 'EPS' control unit in control unit selection ('Overview' menu) and
press •F12“ ('Next') to confirm.

5.2

Once the power steering control unit has been found and is displayed in the list, select the
'Maintenance/repairs' menu.

5.3

Select the 'Commissioning' function and confirm with •F12“ ('Next').

5.4

Follow the instructions on the Tester to perform the commissioning process.

5.5

If the left and right steering lock settings are not saved during the procedure, adjust the
height and depth of the steering wheel position and repeat the commissioning procedure.

Only relevant for vehicles with Scope 5, or if fault memory entries are stored for seat
adjustment: Standardize seat adjustment for driver's and passenger's side.
6.1

Select the 'Seat adjustment on front passenger's side' control unit in the control unit
selection screen ('Overview' menu) and press •F12“ ('Next') to confirm your selection.

6.2

Once the seat adjustment on front passenger's side control unit has been found and is
displayed in the overview, select the 'Maintenance/repairs' menu.

6.3

Select the 'Standardize seat motors' function and press •F12“ ('Next') to confirm your
selection.

6.4

Read the instructions and confirm by pressing •F12“ ('Next').

6.5

Press •F8“ ('Start') to run the procedure.

6.6

Once the seat motors on the passenger's side have been standardized, also teach the
driver's side. To do this, select the 'Seat adjustment on front driver's side' control unit
in the control unit selection screen ('Overview' menu) and repeat steps 6.2 to 6.6. Then,
continue with Step 2.

Manually retract the rear spoiler, which extended automatically during programming.
7.1

Select the 'Rear spoiler' control unit in the control unit selection screen ('Overview' menu)
and press •F12“ ('Next') to confirm.

7.2

Once the rear spoiler control unit has been found and is displayed in the overview, select the
'Maintenance/repairs' menu.

7.3

Select the function ‘Teach rear spoiler’ and press •F12“ (‘Next’) to confirm.

7.4

Read the instructions and confirm by pressing •F12“ ('Next').

7.5

Meet the displayed conditions that must be checked manually and tick the relevant 'Status'
box.

7.6

Select the 'Teach rear spoiler' function and press •F8“ ('Execute') to confirm.

7.7

Once the rear spoiler has been taught and retracted fully, select the 'Overview' menu to
return to the control unit selection screen.

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Calibration of power electronics at front and rear.
8.1

Select the 'Rear high-voltage power electronics' control unit in the control unit selection
screen ('Overview' menu) and confirm with •F12“ ('Next').

8.2

Once the high-voltage power electronics on rear axle control unit has been found and is
displayed in the 'Overview', select the 'Drive links/checks' menu.

8.3

Select the 'Electric motor – Reset calibration' function and confirm with •F12“ ('Next').

8.4

Set the entry to Basic setting in the Values column on the 'Parameters' tab.

8.5

Confirm that calibration has been reset with •F8“ ('Execute').

8.6

Go back to the control unit selection screen ('Overview' menu), select the 'Front
high-voltage power electronics' control unit and repeat Steps 8.2 to 8.4 for the selected
control unit.

8.7

After resetting both calibrations, select the two control units 'Front high-voltage power
electronics' and 'Rear high-voltage power electronics' in the control unit selection
screen and open the 'Fault memory' menu.

8.8

Check whether the fault code 'P171900' is displayed for both control units:
•

•

If the fault code 'P171900' is displayed for the 'Rear high-voltage power electronics' and 'Front high-voltage power electronics' control unit, continue with Step
8.9.
The fault code 'P171900' is not displayed or is displayed only for one of the two
control units. Carry out steps 8.1 to 8.6 for the relevant control units again.

8.9

Disconnect the PIWIS Tester from the vehicle.

8.10

Switch off and disconnect the battery charger.
Information
Resetting the high-voltage power electronics will limit the maximum vehicle speed to 70
km/h (43 mph). The warning message "Reduced speed" will be displayed on the instrument
cluster. Any road on which it is possible to accelerate to a speed of at least 60 km/h (38
mph) can be used as the calibration route.
Read and follow safety instructions:

8.11

•

Only perform calibration on public roads if the road and traffic conditions are conducive
to doing so

•

The road traffic regulations must always be observed

•

Other road users must not be at risk when performing calibration

•

Move the vehicle on public roads only if it is roadworthy

Start the calibration drive and complete the following steps.
•

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Accelerate the vehicle to at least 60 km/h (38 mph).

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Release the accelerator pedal and allow the vehicle roll in overrun for at least 1 second.
Calibration is performed during this overrun phase.
Switch ignition off and on again to reset the "Reduced speed" warning message.

Only relevant if the message "Tire pressure monitoring fault - Service necessary" is displayed:
Teach Tire Pressure Monitoring (TPM) system using the PIWIS Tester.
For instructions, see:
 Workshop Manual '443225 Teaching wheel electronics'

10 Read out and erase the fault memories of all control units.
10.1

Press •F7“ in the control unit selection screen ('Overview' menu) to call up the Additional
menu.

10.2

Select the function “Read all fault memories
and erase if required” and press •F12“
('Next') to confirm  Erasing fault memories.
The fault memories of the control units are
read out.

10.3

Once you have read out the fault memories,
check the fault memory entries.
Information
Erasing fault memories
If control units are found to have faults that
are not caused by control unit programming,
these must first be found and corrected. This work cannot be invoiced under the
workshop campaign number.

10.4

Press •F8“ to delete fault memory entries.

10.5

Press •F12“ ('Yes') in response to the question as to whether you really want to delete all
fault memory entries.
The faults stored in the fault memories of the various control units are deleted.
Information
If fault memory entries for individual control units cannot be deleted, proceed as follows:
•

End operational readiness (switch off ignition).

•

Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.

•

Lock the vehicle using the driver's key and remove the driver's key from the proximity of
the vehicle (approx. 10 metres).

•

Unlock the vehicle again after waiting for at least 15 minutes.

•

Restore operational readiness (switch on ignition).

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10.6

•

Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore
communication with the vehicle.

•

Read out the fault memory again and delete any fault memory entries that are stored.

Once you have erased the fault memories,
select the 'Overview' menu to return to the
control unit selection screen  Control unit
selection.

11 Create vehicle analysis log (VAL) using the PIWIS
Tester.
Mark the vehicle analysis log you have just created
with the attribute "Final VAL" and after carrying out the
campaign, return it using the PIWIS Tester.
12 End operational readiness (switch off ignition).

Control unit selection

13 Disconnect the PIWIS Tester from the vehicle.
Information
Connect the PIWIS Tester to a network as soon as possible and log into the PPN in order to transfer
the backup documentation created during this campaign to the PAG systems.
14 Switch off and disconnect the battery charger.
15 Enter the campaign in the Warranty and Maintenance booklet.
– End of action required –
For warranty processing, see Scope 5 under  Technical Information '443225 Warranty
processing.'

Warranty processing
Information
The specified working time was determined specifically for carrying out this campaign and includes all
necessary preliminary and subsequent work.
The working time may differ from the working times published in the Labor Operation List in the PCSS.

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Information
Information on the working time:
Generally, the working time includes all work that requires the active participation of the service technician.
This also covers all required preliminary work and subsequent work.
The working time includes the following activities during control unit programming:
•

All required steps for starting or finishing programming

•

Required interaction during a programming sequence

•

Waiting times until programming starts

•

Random check of programming status

If no further interaction by the service technician is required once control unit programming has started
because programming is performed automatically, there is no need for the service technician to remain
at the vehicle for the entire programming time.
These waiting times are not included in the working time if the total programming time is more than 15
minutes.
If programming takes up to 15 minutes, the full waiting time is included in the working time.
Scope 1:

Re-programming various control units
Working time:
Re-programming various control units.
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reprogramming various control units to software version
VR8.6
Reprogramming various control units to software version
VR8.7
Reprogramming various control units to software version
VR12.1.1 -> sequence 2
Commissioning power steering
Retracting rear spoiler manually
Standardising driver and front passenger seat adjustment
Calibrating high-voltage power electronics (front and rear
axle)
Reading out and erasing fault memories
Creating vehicle analysis logs (VALs) before and after the
campaign

Labor time: 203 TU

 Damage Code WMH0 066 000 1

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Scope 2:

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Re-programming various control units
Working time:
Re-programming various control units.
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reprogramming various control units to software version
VR12.1.1 -> sequence 2
Commissioning power steering
Retracting rear spoiler manually
Standardising driver and front passenger seat adjustment
Calibrating high-voltage power electronics (front and rear
axle)
Teaching Tire Pressure Monitoring (TPM) system
Reading out and erasing fault memories
Creating vehicle analysis logs (VALs) before and after the
campaign

Labor time: 153 TU

 Damage Code WMH0 066 000 1
Scope 3:

Re-programming various control units
Working time:
Re-programming various control units.
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reprogramming various control units to software version
VR12.1.1 -> sequence 1
Retracting the rear spoiler manually
Teaching Tire Pressure Monitoring (TPM)
Reading out and erasing fault memories
Creating Vehicle Analysis Logs (VALs) before and after the
campaign has been performed
 Damage Code WMH0 066 000 1

Scope 4:

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Re-programming various control units

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Labor time: 96 TU

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Working time:
Re-programming various control units.
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reprogramming various control units to software version
VR12.1.1 -> sequence 3
Manually retracting rear spoiler
Reading out and erasing fault memories
Creating Vehicle Analysis Logs (VALs) before and after the
campaign has been performed

Labor time: 125 TU

 Damage Code WMH0 066 000 1
Scope 5:

Re-programming various control units
Working time:
Re-programming various control units.
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reprogramming various control units to software version
VR8.6
Reprogramming various control units to software version
VR8.7
Reprogramming various control units to software version
VR12.1.1 -> sequence 1/2/3
Commissioning power steering
Retracting rear spoiler manually
Standardising driver and front passenger seat adjustment
Calibrating high-voltage power electronics (front and rear
axle)
Reading out and erasing fault memories
Creating vehicle analysis logs (VALs) before and after the
campaign

Labor time: 250 TU

 Damage Code WMH0 066 000 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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