into the bore (Ø 40 mm) on the
body.

2.2.3

Fit tie-wraps for wire harness (2 x)
on threaded bolts on the outside of
the vehicle ( Figure 8).

Figure 8

Check pin assignment in connector B on the
vehicle side (6-pin; trailer hitch preparation
 Figure 9).
1
2
3
4

– Connector B (6-pin; trailer hitch
preparation)
– Connector B, chamber 1
– Connector B, chamber 6
– Fuse holder H (strip B – white)

Are chambers 1 (swivel motor) and 6 (charge
line) - both on terminal 30 - used?
•
•

Oct 8, 2019
Page 6 of 17

Yes: Continue with Step 2.4
No: Carry out the following work.

Tequipment

Figure 9

Installation and Conversion Instructions
2.3.1

2
3
4

•

2.3.4

ENU

6690

6

– 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 10
-bottom-):
•

2.3.3

29/18

Remove fuse holder H (strip B
– white) from the fuse box in
the luggage compartment ( 
Workshop Manual '978409
Loosening and securing fuse box in
the luggage compartment' Figure
10 -top-).
1

2.3.2

Cayenne (9YA)

Figure 10
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)

Lock connector housing strip B (color: white) and fit it into the fuse holder.
Fit 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 11 ).
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 11 -inset-).
Lock connector B.

Tequipment

Figure 11

Oct 8, 2019
Page 7 of 17

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 12 -A-)

2.4.3

Clip trailer hitch control unit bracket at the top into the web plate on the body (
Figure 12 -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

Fit trailer hitch control unit into the
bracket ( Figure 13 ).
1
2

Figure 12

– Trailer hitch control unit
– Bracket

Figure 13

Oct 8, 2019
Page 8 of 17

Tequipment

Installation and Conversion Instructions
2.5

Cayenne (9YA)
29/18

ENU

6690

6

Fit cable ring eyelet A6 at the ground pin
MB25 ( Figure 14 -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 14).

2.7

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

Figure 14

Connect plug connection (2-pin

 Figure 15) 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

Fit connection point at a suitable
location using a clip.
Figure 15
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 16 ).
1

2

– "Electric Brake for Trailer
not connected" warning
sticker
– "Ball Position" sticker
Figure 16

Tequipment

Oct 8, 2019
Page 9 of 17

6

Cayenne (9YA)
6690

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Installation and Conversion Instructions

29/18

2.8

Check fuse assignment in fuse holder H (strip
B – white  Figure 17) 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 17

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

ONLY for –electric– trailer hitch (1D3/1D9):
Route and connect electric wire harness ( Figure
18) for trailer hitch switch.
1
2
3
3.1

3.2

– Connector D (10-pin) – trailer hitch control
unit
– Connector (2-pin) – bridge for "light" on
trailer hitch switch
– Connector (12-pin) – trailer hitch switch
Remove side trim panel for luggage
compartment (at the right)  Workshop
Manual '700319 Removing and installing side
trim panel for rear luggage compartment'.
ONLY for vehicles with standard springs/chassis (1BA/1BH):
Create bridge for "light" on switch for –electric– trailer hitch (1D3)
3.2.1

Oct 8, 2019
Page 10 of 17

Figure 18

Remove luggage rail, support at the left and rear-end electronics control unit with
holder from the luggage compartment (  Workshop Manual '578919 Removing
and installing rear-end electronics').

Tequipment

Installation and Conversion Instructions
3.2.2

2
3
4
5

ENU

6690

6

– Plug connection (2-pin) –
wire harness for switch
– Connector A (17-pin,
green)
– CY/BU line 0.352
– YE/BK line – wire harness
for switch
– Rear-end electronics
control unit

Remove connector A (17-pin, green

 Figure 19 -2-) from rear-end

electronics control unit and release
it.
3.2.4

29/18

Release connector housing (2-pin
 Figure 19 -1-, secured to wire
harness for trailer hitch switch in a
bag).
1

3.2.3

Cayenne (9YA)

Figure 19

Unpin CY/BU line 0.352 from chamber 5 (connector A, 17-pin, green) ( Figure 19
-A-).
Then insert it into chamber 1 (connector housing, 2-pin, wire harness for switch)
( Figure 19 -B-).

3.2.5

Check that the same chambers in the connector housing/plug socket (2-pin) are
used.
Lock connector housing (2-pin) and connect plug connection.

3.2.6

Insert YE/BK line (wire harness for switch) into chamber 5 (connector A, 17-pin,
green) ( Figure 19 -C-).
Lock connector housing and fit it into the rear-end electronics control unit.

3.2.7

Route wire harness for switch with connector D (10-pin) to the trailer hitch control
unit.
Secure wire harness in the passenger compartment to existing lines/components
with tie-wraps without tensile stress and so that no chafing occurs.

3.2.8

Install rear-end electronics control unit in the luggage compartment (  Workshop
Manual '578919 Removing and installing rear-end electronics').
Tightening torque 3 Nm (2 ftlb.)

3.3

ONLY for vehicles with Surround Sound System (9VJ/9VL):
Remove subwoofer (  Workshop Manual '913619 Removing and installing subwoofer
(Burmester)' or  Workshop Manual '913619 Removing and installing subwoofer (Bose)').

3.4

Route electric wire harness for switch for –electric– trailer hitch (1D3).

Tequipment

Oct 8, 2019
Page 11 of 17

6

Cayenne (9YA)
6690

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Installation and Conversion Instructions

29/18
3.4.1

Insert connector D (10-pin) in slot
D on the trailer hitch control unit
( Figure 20).
1
2
3
4

–
–
–
–

Connector D (10-pin)