No. 75-21-2

Service
Technical Information
75/21
ENU
AMB0
7
AMB0 – Retrofitting Heating Element for Passenger Seat Backrest (Stop Delivery/Recall
Campaign)
Revision:
This bulletin replaces bulletin Group 7 75/21 AMB0, dated September 16, 2021.
Model Year:
As of 2020 up to 2021
Model Line:
Cayenne (9YA/9YB)
Concerns:
Heating element for passenger seat backrest
Information:
Due to an assembly error that has since been corrected, the subject vehicles were assembled
without the passenger seat back heating element.
This variation from specification can affect the Occupant Classification System as calibrated for this
specific vehicle. If warnings are ignored, the front passenger restraint systems may not be activated as
designed.
In the event of occupant classification system malfunctions, the "Airbag warning lamp" or “Passenger
Airbag OFF” lamp will be activated in order to alert the occupants.
Action required: Retrofit heating element for passenger seat backrest.
Please note: All vehicles affected by this campaign do not have seat heating and will not gain seat
heating functionality with the completion of this campaign. The seat heating element on the front
passenger seat is only required for the correct function of the front passenger seat occupant detection
system. For this reason, the seat heating element is always installed regardless of whether the vehicle is
equipped with seat heating or not.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
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Technical Information
75/21
Installation
Position:
1
Installation position of heating element for passenger seat backrest
– Heating element for passenger seat backrest (retrofitting)
Required tools
Tools:
•
•
•
•
•
•
•
•
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Torque wrench, 20–100 Nm (15–74 ftlb.), e.g. VAS 5820 Torque wrench, 20-100 Nm (15-74
ftlb.)
V.A.G 1634B - Cushion clip pliers
9747 - 9747 - Wetting-off iron
9747/1 - 9747/1 - Knurling tool
9747/2 - 9747/2 - Bone burnisher
V.A.G 1416 - Hot-air blower
9900 - PIWIS Tester 3
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 Battery charger 90A
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Technical Information
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AMB0
7
Parts required
Parts Info:
Part No.
Designation
– Use
Qty.
9Y0963557E
 Heating element
– Passenger seat backrest
1 ea.
N 90791201
 Internal hexagon round/oval-head screw
– Side airbag unit
1 ea.
...
Seat cover clip
i.e. Part No. N 0152612
or alternative (commercially available)
28 ea.*
* For warranty processing, the cushion clips can be invoiced either under the part number or under Part
No. AMB00000001 with the "expendable items" designation as an additional part in the warranty
claim.
Retrofitting heating element for passenger seat backrest
Work Procedure: 1
Remove the padding from the front passenger seat backrest.  Workshop Manual '741719
Removing and installing padding for front backrest'
2
Remove cover for front backrest.  Workshop Manual '741919 Removing and installing cover for
front backrest'
3
Retrofit the heating element on the front passenger
seat.
3.1
Position the heating element  Heating
element for front passenger seat -1- on the
padding for the front backrest.
3.2
Carefully remove protective film from the
backing sheet in the marked area  Heating
element for front passenger seat -2- and
press heating element  Heating element for
front passenger seat -1- on firmly.
Heating element for front passenger seat
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3.3
Press heating element  Heating element for
front passenger seat -1- into the grooves in
area  Heating element for front passenger
seat -2-.
4
Install cover for front backrest.  Workshop Manual
'741919 Removing and installing cover for front
backrest'
5
Install the front backrest padding and make sure that
the wire harness for the heating element is routed as
specified in the Workshop Manual.
Heating element for front passenger seat
For instructions, see:
 Workshop Manual '741719 Removing and installing padding for front backrest'
The plug connection for the backrest heating element
is located on the bottom of the passenger seat as
shown in the illustration  Heating element - electric
plug connection -1-.
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Read out and erase the fault memories of all control
units.
6.1
Connect a battery charger that is suitable
for lithium starter batteries with a current
rating of at least 90 A (e.g. Battery charger
90A) to the jump-start terminals in the engine
compartment.
Heating element - electric plug connection
For instructions, see  Workshop Manual
'2706IN External power connection, jump-lead starting'.
6.2
Position the driver's key in the rear area
of the left cupholder in the center console
between the holding struts (emergency start
tray) in order to guarantee a permanent radio
link between the vehicle and driver's key
 Emergency start tray.
6.3
Connect 9900 - PIWIS Tester 3 to the
vehicle communication module (VCI) via the
USB cable. Then connect the communication module to the vehicle and switch on the
PIWIS Tester.
6.4
Switch on the ignition and open the 'Diagnostics' application on the PIWIS Tester start screen.
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Emergency start tray
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AMB0
7
6.5
Press •F7“ in the control unit selection screen ('Overview' menu) to call up the Additional
menu.
6.6
Select the function “Read out all fault
memories and erase then if necessary” and
press •F12“ ('Next') to confirm  Erasing
fault memories.
The fault memories of the control units are
read out.
6.7
Once you have read out the fault memories,
check the fault memory entries.
Erasing fault memories
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.
6.8
Press •F8“ to delete fault memory entries.
6.9
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:
•
Switch off ignition.
•
Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.
•
Lock the vehicle using the driver’s key.
•
Wait approx. 1 minute before unlocking the vehicle again.
•
Start the engine, leave it running for a short time and then stop it again.
•
Switch off the ignition and wait approx. 10 seconds before switching it back on again.
•
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.
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6.10
Once you have erased the fault memories,
select the 'Overview' menu to return to the
control unit selection screen  Control unit
selection.
7
Switch off ignition.
8
Disconnect the PIWIS Tester from the vehicle.
9
Switch off and disconnect the battery charger.
Control unit selection
10 Enter the campaign in the Warranty and Maintenance
booklet.
Warranty processing
Scope 1:
Retrofitting heating element for passenger seat backrest
Working time:
Retrofitting heating element for passenger seat backrest
Includes:
Removing and installing padding for front backrest
Removing and installing cover for front backrest
Reading out and erasing fault memories of all control units
Labor time: 247 TU
Parts required:
9Y0963557E
Heating element
1 ea.
N 90791201
Internal hexagon round/oval-head
screw
1 ea.
N 0152612
Clamp
28 ea.
Expendable items
1 ea.
or
AMB00000001*
* For warranty processing, enter the Part No. AMB00000001 with the "expendable items" designation as an additional part costing $ 2.38 in the warranty claim.
 Damage Code AMB0 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.
Sep 17, 2021
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