End operational readiness (switch off ignition).

1.2

Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.

1.3

Lock the vehicle using the driver's key and remove the driver's key from the proximity of the
vehicle (approx. 10 meter/ 32.8 ft).

1.4

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

1.5

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

Move the vehicle onto a lifting platform, but do not raise it yet.
Follow the instructions on the PIWIS Tester for raising the vehicle during the following sequence.

Information
The current version of the onboard Owner's Manual has been available online since 5 March 2021.
A blank USB storage medium is required for installing the onboard Owner's Manual (approx. 100 MB). If
there is already data stored on the USB storage medium, this will be deleted during the procedure.

Information
Before starting sequence 5 (subsequent work), connect the PIWIS Tester to a network to establish an
Internet connection. The PIWIS Tester must be connected online for the subsequent work described
below and for installing the onboard Owner's Manual.

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Information
Special features of sequence 5:
•

Component protection: Component protection must only be taught for the control unit for
assistance systems (zFAS). To do this, select component protection for assistance systems
(zFAS) in the procedure. If the component protection teaching process is aborted, stop sequence
5 and read and follow the additional information provided under  Technical Information '915200
Additional instructions for the concluding work'.

•

Enabled functions: If function activation is aborted, component protection must first be taught
again. Then, start sequence 5 again in order to restore the enabled functions.

•

Coding of all control units: Always allow coding to run to the end of the process. If individual
coding routines fail, the relevant control units can be selected manually in the overview afterwards
and coded again individually.

3

Start subsequent work for various control units (sequence 5).
Required PIWIS Tester software version:

40.550.040 (or higher)

Programming code:

K4M5S

Work Procedure:

Read and follow the information and
instructions on the PIWIS Tester during
the guided procedure for the subsequent
work.
Do not interrupt the process.

Programming time (approx.):

approx. 55 minutes

Subsequent work carried out during this process

•

Distance measuring sensor (ACC) Reset personalisation

For manual procedure, see  Workshop
Manual '278555 Replacing control unit for
distance measuring sensor'.
•

Air conditioning - Teach servo motors

For the manual procedure, see relevant
servo motor Workshop Manual 872019xx.
•

Commissioning rear-differential lock

For manual procedure, see  Workshop
Manual '397555 Replacing control unit for
rear-differential lock'.
•

AfterSales

Engine electronics (DME) transmission
adaptation

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For manual procedure, see  Workshop
Manual '247055 Replacing DME control
unit'.
•

Door standardisation, front and rear

For manual procedure, see
•
•
•

 Workshop Manual '577355
Replacing front door control unit'
 Workshop Manual '587355
Replacing rear door control unit'
Teaching component protection

For manual procedure, see  Workshop
Manual '903555 Replacing gateway
control unit'. Select the control unit for
assistance systems (zFAS) in the PIWIS
Tester procedure.
•

Restoring enabling functions

For manual procedure, see  Workshop
Manual '903555 Replacing gateway control
unit'.
•

Installing onboard operating
instructions

For manual procedure, see  Workshop
Manual '0X01IN Diagnostic system:
Performing vehicle handover'.
Procedure if the sequence is aborted:

•

Automatic coding of all control units

•

End and restore operational readiness
(switch ignition off and then on again).
Read out and erase the fault memory
 Workshop Manual '9X00IN Basic
instructions and procedure for control
unit programming using the PIWIS
Tester'.
Repeat subsequent work sequence
by entering the programming code
again, whereby extended logging must
be started using the key combination
•Ctrl“ + •L“.
Extended logging records diagnostic
software data, particularly vehicle
communication data, which is required

•

•

•

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•

•

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

4

5

6

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for analysing the issues that caused
programming to be aborted.
If subsequent work is aborted a second
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"'.

Create new working log.
4.1

After programming has been performed, confirm with •F4“('Save') in the campaign menu
at the bottom.

4.2

Select •F10“ ('Logs').

4.3

Select the log type Working log.

4.4

Rename and store the working log you have just created with the designation of the
sequence carried out.

4.5

Mark the working log and use •F10“ ('Display').

4.6

Select the Printer icon at the top right of the selection bar.

4.7

Select printer ('PDF').

4.8

Print the working log, saving it automatically to the Tester.

Establish bus idle for at least 15 minutes.
5.1

End operational readiness (switch off ignition).

5.2

Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.

5.3

Lock the vehicle using the driver's key and remove the driver's key from the proximity of the
vehicle (approx. 10 meter/ 32.8 ft).

5.4

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

5.5

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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6.1

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

6.2

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

6.3

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

6.4

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

6.5

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 1 and 2 or if fault memory entries are stored for seat
adjustment: Standardize seat adjustment for driver's and passenger's side.
7.1

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.

7.2

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.

7.3

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

7.4

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

7.5

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

7.6

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.
8.1

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

8.2

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

8.3

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

8.4

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

8.5

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

8.6

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

8.7

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.
9.1

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

9.2

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.

9.3

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

9.4

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

9.5

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

9.6

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.

9.7

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.

9.8

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.

9.9

Disconnect the PIWIS Tester from the vehicle.

9.10

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:

9.11

•

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.
•

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.

10 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'
11 Read out and erase the fault memories of all control units.
11.1

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

11.2