Workshop Manual '978409
Loosening and securing fuse box in
the luggage compartment' Figure
8 -top-).
1
2
3
4

2.3.2

Cayenne (9YA)

– Fuse holder H (strip B –
white)
– Cover on underside
– Latch on fuse holder
– RD/GN line 2.52

Release fuse holder H (strip B –
white) and connect the lines (RD/GN
and RD/YE) as follows ( Figure 8
-bottom-):
•
•

Figure 8
Chamber 6: RD/GN line 2.52
 Preparation for connector B, chamber 1 (swivel motor)
Chamber 7: RD/YE line 2.52  Preparation for connector B, chamber 6
(charge line)

2.3.3

Lock connector housing strip B (color: white) and Install it into the fuse holder.

2.3.4

Install fuse holder H (strip B – white) in the fuse box in the luggage compartment
(  Workshop Manual '978409 Loosening and securing fuse box in the luggage
compartment').

2.3.5

Route RD/GN and RD/YE lines
to connector B (preparation).
( Figure 9).
1
2
3

– RD/GN and RD/YE lines
– Connector B (preparation)
– Fuse box in luggage
compartment

Release connector B, connect lines
RD/GN and RD/YE as described in
Step 2.3.2 ( Figure 9 -inset-).
Lock connector B.

Tequipment

Figure 9

Jun 2, 2022
Page 7 of 13

6

Cayenne (9YA)
6690

ENU

Installation and Conversion Instructions

29/18

2.4

Install trailer hitch control unit in the luggage
compartment area (left side panel)
1
2
3
4

– Trailer hitch control unit bracket
– Connector A – wire harness for
trailer hitch
– Ground line 2.52 – BN
– Ground pin MB25

2.4.1

Disconnect any lines and hoses in
the installation area.

2.4.2

Insert pins (2 x on underside of
control unit bracket) into the body
( Figure 10 -A -)

2.4.3

Clip trailer hitch control unit bracket at the top into the web plate on the body (
Figure 10 -B -).

2.4.4

Guide connector A (wire harness for trailer hitch) and connector B/C (trailer hitch
preparation) into the control unit bracket.

2.4.5

Install trailer hitch control unit into
the bracket ( Figure 11 ).
1
2

Figure 10

– Trailer hitch control unit
– Bracket

Figure 11

Jun 2, 2022
Page 8 of 13

Tequipment

Installation and Conversion Instructions
2.5

Cayenne (9YA)
29/18

ENU

6690

6

Install cable ring eyelet A6 at the ground pin
MB25 ( Figure 12 -2-).
1
2
3
4
5
6

– Ground line BN 2.52
– Ground pin MB25
– Connector A (wire harness for trailer
hitch)
– Connector B (preparation)
– Connector C (preparation)
– Trailer hitch control unit

Tightening torque 9 Nm (6.5 ftlb.)
2.6

Connect plug connections for connector
A/B/C to the trailer hitch control unit ( Figure 12).

2.7

ONLY for –mechanical– trailer hitch (1D6):
2.7.1

Figure 12

Connect plug connection (2-pin

 Figure 13) for brake booster
preparation in the luggage
compartment area at the left.
1
2
3

– Connector (2-pin) – brake
booster preparation
– Connector A
– Ground line BN 2.52

Install connection point at a suitable
location using a clip.
Figure 13
2.7.2

Affix sticker showing the warning
"Electric Brake for Trailer not
connected" on a clean surface at
a clearly visible position next to
the "Ball Position" sticker or the
dashboard ( Figure 14 ).
1

2

– "Electric Brake for Trailer
not connected" warning
sticker
– "Ball Position" sticker
Figure 14

Tequipment

Jun 2, 2022
Page 9 of 13

6

Cayenne (9YA)
6690

ENU

Installation and Conversion Instructions

29/18

2.8

Check fuse assignment in fuse holder H (strip
B – white  Figure 15) and insert missing
fuses if necessary:
•
•
•
•

Fuse slot 5 = trailer hitch (right light) =
25 A
Fuse slot 6 = trailer hitch (swivel motor)
= 30 A
Fuse slot 7 = trailer hitch (attaching
trailer & electric release) = 15 A
Fuse slot 9 = trailer hitch (plug socket) =
15 A
Figure 15

NOTICE
Incorrect line routing
•

Risk of damage to lines and hoses

•

Malfunction and fault memory entry on control unit



Avoid small bending radii when routing lines.



File down edges and burrs in the routing area or mask them with adhesive tape.



Maintain a sufficient distance from components exposed to high temperatures while driving.
3

Concluding work
3.1

Install side trim panel for luggage compartment  Workshop Manual '700319 Removing
and installing side trim panel for rear luggage compartment'.

3.2

Install rear apron (  Workshop Manual '635519 Removing and installing rear apron')

3.3

Lower the vehicle (  Workshop Manual '4X00IN Lifting the vehicle')

Coding:
NOTICE
Voltage drop
•

Risk of irreparable damage to control unit

•

Risk of damage to control unit

•

Fault entries in the control unit

•

Coding in the control unit is aborted

•

Malfunctions in control unit, even during programming



Switch off the ignition and remove the ignition key before disconnecting the control unit.



Ensure that the power supply is not interrupted during programming.

Jun 2, 2022
Page 10 of 13

Tequipment

Installation and Conversion Instructions


Cayenne (9YA)
29/18

ENU

6690

6

Connect a battery charger with a current rating of at least Nominal value 90 A to the vehicle battery.
4

Coding/programming trailer hitch (1D6)
4.1

Preparatory work – Coding
NOTICE

Control unit programming will be aborted if the Internet connection is unstable.
•

An unstable Internet connection can interrupt communication between PIWIS Tester
III and the vehicle communication module (VCI). As a result, control unit programming
may be aborted.



During control unit programming, always connect PIWIS Tester III to the vehicle
communication module (VCI) via the USB cable.
4.1.1

9900 - PIWIS Tester 3 must be connected to the vehicle and switched on.

4.1.2

Switch on ignition AND hazard warning lights on the vehicle.
Information
The 9900 - PIWIS Tester III instructions take precedence since the description
may be different with later Tester releases.
The procedure described here has been structured in general terms; different text
or additions may appear on the 9900 - PIWIS Tester III.

4.1.3

Select the "Diagnostics" menu item on the PIWIS Tester.

4.1.4

If 9900 - PIWIS Tester 3 is connected correctly, a connection to the vehicle will be
established: "Cayenne" model line is detected.

4.1.5

Press •F12“ to go to the control unit search screen.

4.1.6

Confirm the question: "Create vehicle analysis log (VAL)?" with "Yes" = •F12“.

Information
The function is ONLY available when the Tester is online!
4.2

Enter the new vehicle equipment in the vehicle data using "PIWIS Online"
4.2.1

Press •F7“ in the control unit overview to switch to the “Additional menu”.

4.2.2

Select the function "Maintenance of vehicle data with PIWIS ONLINE".
A message appears informing you that the "Actual" (vehicle) data and "Required"
(PIWIS Online) data will be compared.
Press •F12“ to continue.

Tequipment

Jun 2, 2022
Page 11 of 13

6

Cayenne (9YA)
6690

ENU

Installation and Conversion Instructions

29/18
4.2.3

Confirm the message "The vehicle data was compared with PIWIS Online.
Significant differences were found" with •F12“.

4.2.4

Look for the option "TRAILER HITCH" in the "Family" column.
Select the available option from the drop-down menu in the "Value" column,
depending on the option installed:
•

1D6 – TRAILER HITCH WITHOUT TOW BALL (USA)

Press •F12“ to continue.
4.2.5

A table containing the coding value and the columns "new value" and "old value" is
displayed in the overview. Press •F8“ to continue.

4.2.6

Data is then written/stored. The following messages appear one after the other:
•
•
•
•

4.3

Transferring vehicle data to PIWIS Online.
Writing and transferring vehicle data to the vehicle.
Vehicle order was written successfully.
A check was performed in order to check whether control units have to be
coded or programmed as a result of the changes that were made.

Code/program the new vehicle equipment.
4.3.1

Confirm the table containing a list of control units that must be coded/programmed
by pressing •F12“.

4.3.2

Individual data records will be loaded, depending on the number of control units to
be coded/programmed.
Wait until the message "Creating backup documentation. Please wait..." and
"Coding was completed successfully" appears. Press •F12“ to continue.
Repeat the process for other control units if necessary.

4.3.3

Wait until the message "Adaptation of the control units is complete." appears and
check the coding status of the control units in the table that is displayed.
Continue by pressing •F12“ to return to the control unit overview.

Jun 2, 2022
Page 12 of 13

4.4

ONLY for vehicles with Lane Change Assist (7Y1/7Y2/7Y3 or 7Y8):
Calibrate control unit for Lane Change Assist (  Workshop Manual '917025 Calibrating
Lane Change Assist')

4.5

Read out the fault memories of all systems, work through any existing faults and erase the
fault memories.  Workshop Manual '0335IN Diagnostic maintenance: diagnostic system
and maintenance inter…'

4.6

Create another vehicle analysis log (VAL) in the "Control unit overview" menu item.

4.7

Switch off ignition and disconnect 9900 - PIWIS Tester 3.

4.8

Drive the vehicle off the lifting platform.

Tequipment

Installation and Conversion Instructions

Cayenne (9YA)
29/18

66 90 23 00:

–Retrofitting –mechanical– trailer hitch–
Includes:
Removing and installing rear apron and left side trim panel for
rear luggage compartment;
Removing rear bumper and installing trailer hitch;
Making cut-out for removable ball hitch in rear apron;
Coding/programming new vehicle equipment.

91 70 25 53:

ONLY for vehicles with Lane Change Assist/Lane Keep Assist (6I3/ 7Y1):
Programming Lane Change Assist control unit
Includes:
Calibrating calibration plate on the vehicle.

51 01 71 05:

ENU

6690

6

Labor time: 238 TU

Labor time: 47 TU

ONLY for vehicles with painted wheel arch extensions (6GH/ 6GJ/ 6GK or SportDesign package):
Body paint finish prepared
Includes:
Order-related Painting of new parts, Step 1
plastic part

Labor time: 130 TU

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.

© 2022 Porsche Cars North America, Inc.

Tequipment

Jun 2, 2022
Page 13 of 13