Lighting

Lighting

Headlamps
Since twin headlights are used, the low beams are also on when the high beams are on. DRL (running lights) or NDRL (normal headlights) can be programmed by the customer and with diagnostics tool.
DRL= Daytime Running Light, NDRL= Non Daytime Running Light
- By the customer: The light switch must be in position for parking lights. The ignition must be on (pos. II). Hold and turn the light switch towards yourself and turn the headlight switch to pos. 0. The green light-emitting diode below the switch is lit to confirm that DRL is on. To return to NDRL, do the same thing and the green light-emitting diode goes off as confirmation.
- Witt the diagnostics tool; follow the instructions in the program menu.

If DRL is programmed:
- Continuous high beams in key position 2.
- High beams only in key position 2.
- Flash the light with a light pull.
- Continuous light with a heavy pull.

Some functions must be programmed in Central electronic module (CEM) after the module has been replaced:
- Since twin headlights are installed, high beams and low beams can be on at the same time
- Running lights
- Rear wiper for V40
- Follow-Me-Home lighting
Switches have a smoother design thanks to lower current flow through these switches.
If a switch is activated for a longer time than 180 seconds (e.g., if it jams), the function is shut off for safety reasons.
When the starter motor is engaged (key in pos. 3), all functions are cancelled without the functions' status changing.
If voltage is too low and high beams are selected, only low beams are available.
Should a major malfunction occur on Central electronic module (CEM), the low beams are turned on.

Wash/wipe
If rear window washing is used for shorter time than 350 ms, a wiper stroke (impulse function) is performed, which cancels the interval function.
For rear window wiper, the wiper performs three strokes after washing. The windshield wipers perform two strokes, followed by an extra stroke.
Washer functions front and rear are not synchronized.
The rear window washer is activated when reversing if the windshield wiper is engaged and reverse gear is selected. The rear window wiper does not have to be activated.

Lighting
Central electronic module (CEM) controls the following functions itself and reads off status of the other functions that are controlled directly by the lever:
- 0 windshield wiper
- interval wiper windshield
- 0 rear window wiper
- interval wiper rear window

Fog lamps
Fog lights front can only be turned on when the key is in pos. 2 and light switch in pos. 1 or 2.
Rear fog lights can be turned on with the key in pos. 2 and light switch in pos. 2, or light switch is in pos. 1 and front fog lights are on.
All fog lights are turned off when the light switch is set in pos. 0, or the ignition is turned off.
If fog lights have been installed as accessories, a new push-button has to be installed on the light switch. The fog light must be programmed with the diagnostics tool.

"Follow-Me-Home"
If you pull on the light lever with the key in pos. 0 or 1, the low beams are lit for 30 seconds.
If another light pull is performed during this 30 second period, the low beams go off.
"Follow-Me-Home"-function can be programmed (activated/deactivated with the diagnostics tool).

Tail lights and parking lights
For safety reasons, the lighting is divided into two separate circuits.
- The parking circuit includes the outer tail lights and parking lights in the headlights.
- The tail light circuit includes the front and rear side running lights, the inner tail lights, and license plate lighting.
The parking lights are on if the light switch is in pos. 1 and the key is in pos. 0 or 1.
With key in pos. 0 or 1, the tail lights are off and the parking lights on only if the light switch is in pos. 1.