Land Rover Discovery: Daytime Running Lamps / Description and Operation
OVERVIEW
The Daytime Running Lamps (DRL) and side lamps are incorporated into the
headlamp assemblies.
For additional information, refer to: Exterior Lighting (417-01, Description
and Operation).
On Rest Of World (ROW) vehicles with halogen headlamps, the DRL use the
same lamp as the main beam lamp.
On North American Specification (NAS) vehicles with halogen headlamps,
the DRL use the same Light Emitting Diodes (LEDs) as the dip beam lamp.
On vehicles with xenon headlamps, the 'signature' side lamp LEDs are used
for the DRL function, but are illuminated at a higher intensity for DRL
operation than for side lamp operation.
On Japan market vehicles, the DRL function is inoperative.
DESCRIPTION
For additional information, refer to: Exterior Lighting (417-01, Description
and Operation).
OPERATION
REST OF THE WORLD (ROW)
The DRL are switched on when the following conditions are met:
- Ignition is in power mode 7 - engine running
- Lighting control switch is in the off position or in the 'AUTO' position
(rain/light sensor not requesting exterior lighting operation).
The DRL remain off if:
- Park is still selected (automatic transmission only)
- Neutral is still selected and the park brake is applied (manual
transmission
only)
- The vehicle has not moved since the engine was manually started (not
started using stop/start sequence - only applies to vehicles with the
stop/start system).
The DRL are illuminated at a higher intensity than the side lamp operation.
Depending on market, the DRL will be dimmed to the intensity of the side
lamp or switched off when the turn signal indicator on that side is active. For
example, if the left turn signal indicator is active, the left the DRL is dimmed
or switched off until the turn signal indicator becomes inactive. The
opposite headlamp DRL will remain on at full intensity.
If the hazard warning lamps become active, the DRL are dimmed to the
intensity of the side lamps on both headlamps until the hazard warning
lamps are deactivated.
The DRL are switched off when the following conditions occur:
- Ignition state is changed to power mode 4 (accessory) or power mode 0
(locked and alarmed)
- Lighting control switch is moved from off to side lamps or headlamps
position
- Lighting control switch is in the 'AUTO' position and the rain/light
sensor
requests exterior lighting on
The DRL are not switched off when the headlamp flash function is operated.
NORTH AMERICAN SPECIFICATION (NAS)
The DRL are switched on when the following conditions are met:
- Ignition is in power mode 7 - engine running
- Lighting control switch is in the off position or in the 'AUTO' position
(rain/light sensor not requesting exterior lighting operation).
The DRL remain off if:
- Park is still selected (automatic transmission only)
- Neutral is still selected and the park brake is applied (manual
transmission)
- The vehicle has not moved since the engine was manually started (not
started using stop/start sequence - only applies to vehicles with the
stop/start system).
The DRL are illuminated at a higher intensity than the side lamp operation.
The DRL will be switched off when the turn signal indicator on that side is
active. For example, if the left turn signal indicator is active, the left DRL
will
be switched off until the turn signal indicator becomes inactive. The
opposite headlamp DRL will remain on at full intensity.
If the hazard warning lamps become active, the DRL are switched off until
the hazard warning lamps are deactivated.
The DRL are switched off when the following conditions occur:
- Park is selected (automatic transmission vehicles)
- Neutral is selected and the park brake is applied (manual transmission
vehicles)
- Ignition state is changed to power mode 4 (accessory) or power mode 0
(locked and alarmed)
- Lighting control switch is moved from off to side lamps or headlamps
position
- Lighting control switch is in the 'AUTO' position and the rain/light
sensor
requests exterior lighting on.
The DRL will not be switched off when the headlamp flash function is
operated.
READ NEXT:
PRINCIPLES OF OPERATION
For a detailed description of the Daytime Running Lamps, refer to the
relevant Description and Operation section in the workshop manual. REFER
to: Daytime Running Lamps (417-04
COMPONENT LOCATION - SHEET 1 OF 2
Central Junction Box (CJB)
Instrument panel illumination
Approach lamp - door mirror
Door ambience lighting Light Emitting Diodes (LEDs)
Luggage compartment a
Left reading lamp
Interior lamp
Right reading lamp
The front interior and reading lamps are LED's located on the PCB in the
overhead console. The lamps are manually controlled by a proximity se
SEE MORE:
Installation
Dress the flanges where necessary.
Offer up the new rear floor side extension and clamp into position.
Check alignment if correct, proceed to next step, if not, rectify and
recheck before proceeding.
NOTE:
Make sure the holes are drilled through the side member and
the rear floor
CAUTION:
If the front airbags are deployed, the following components must be
replaced:
Driver airbag module
Steering wheel
Passenger airbag module
Instrument panel
Fly leads (where applicable) connecting front airbag modules to SRS
harness
All seat belt buckle pre-tensioner
All occupied sea