Volvo XC 90 Owner's Manual page 387

IMPORTANT
When the engine is switched off, the constant
battery voltage to the trailer connector can be
switched off automatically so as not to drain
the starter battery.
Trailer weights
Information about Volvo's permitted trailer
weights is available in the article "Towing
capacity and towball load".
WARNING
Follow the stated recommendations for trailer
weights. Otherwise, the car and trailer may be
difficult to control in the event of sudden
movement and braking.
NOTE
The stated maximum permitted trailer weights
are those permitted by Volvo. National vehicle
regulations can further limit trailer weights
and speeds. Towbars may be certified for
higher or lower towing weights than the car
can actually tow.
Direction indicators and brake lights on
the trailer
If one or more of the trailer lamps is broken, the
driver display shows a symbol and a message.
Symbol Message
•
Trailer turn indicator Right
turn indicator malfunction
•
Trailer turn indicator Left
turn indicator malfunction
•
Trailer brake light Malfunc-
tion
If any lamp for the trailer's direction indicators is
broken, the driver display symbol for direction
indicators will also flash more quickly than nor-
mal.
Checking trailer lamps*
Automatic checking
After a trailer is connected, it is possible to check
that the trailer lamps are working via an auto-
matic lamp check. The function helps the driver
check that the trailer lamps are working before
starting off.
The engine must be switched off to perform the
check.
1. When a trailer is connected to the towing
bracket, the Automatic Trailer Lamp
Check
message is shown in the driver dis-
play.
STARTING AND DRIVING
2. Confirm the message by pressing the right-
hand steering wheel keypad's O button.
> The lamp check starts.
3. Exit the car to check lamp functionality.
> All trailer lamps start to flash - then the
lamps are switched on one at a time.
4. Visually check that all lamps available on the
trailer are operational.
5. After a moment, all lamps on the trailer flash
again.
> The check is complete.
Switching off automatic checking
The automatic checking function can be switched
off in the centre display.
1. Press Settings in the top view.
2. Press
My Car Lights.
3. Deselect Automatic Trailer Lamp Check
Manual checking
If the automatic checking is switched off then it is
possible to start the check manually.
1. Press Settings in the top view.
2. Press
My Car Lights.
3. Select Manual Trailer Lamp Check
> The lamp check starts. Exit the car to
check lamp functionality.
* Option/accessory, for more information, see Introduction.
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