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:
Daytime Running Lamps / Diagnosis and Testing
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
Interior Lighting / Description and Operation
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
Front Interior and Reading Lamps - Overhead Console
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
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circumstances, the power supply to the Portable Audio Interface Panel will
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