Part 2
Exterior Lighting
ADAPTIVE FRONT LIGHTING SYSTEM (AFS)
The system operates by the AFS control module receiving inputs from the engine control module for engine running signal, the ABS module for steering angle and vehicle speed and a reverse gear input from the transmission.
The AFS control module is located behind the dashboard attached to the RH (right-hand) side of the fire wall.
The AFS control module processes these signals and provides an output to the headlamp leveling motors to adjust the headlamp horizontal aim according to vehicle speed and steering angle.
NOTE:
In markets with Daytime Running Lamps (DRL), the AFS system will not operate when the DRL are active.
The AFS control module is connected on the high speed CAN (controller area network) bus to receive information from other vehicle systems. The control module is connected to the AFS Headlamps on a dedicated LIN (local interconnect network) bus. The AFS control module calculates, using input data from other systems, the required position of the horizontal adjustment of the projector modules. The position information is then output on the LIN (local interconnect network) bus to the AFS Headlamps. This module then outputs the appropriate signals to drive the AFS stepper motors in the headlamp to the appropriate position.
The horizontal position of the projector modules is dependent on a number of input variables. The position is determined by vehicle speed and steering angle. When reverse gear is selected, the projector modules are moved to the straight ahead position to avoid glare to other road users.
The angles of each projector module differ to give the correct spread of light, for example, when turning left, the left hand projector module will have a greater swiveling angle than the right hand projector module.
In the event of a failure of the AFS system, a warning indicator in the instrument cluster flashes to warn the driver. The AFS warning indicator illuminates when the ignition switch is in power mode 6 or above and will flash continuously until the fault is rectified.
Illumination of the AFS warning indicator does not necessarily mean that there is a fault with the AFS system. The fault may be caused by a failure of another system such as steering angle sensor or the vehicle speed signal missing, preventing the AFS system operating correctly.
HEADLAMP LEVELING
Headlamp leveling provides for the adjustment of the vertical aim of the headlamps to minimize glare to other road users when the vehicle attitude changes due to vehicle loading.
Two types of headlamp leveling are available dependent on the type of headlamps fitted to the vehicle:
- Manual headlamp leveling - Halogen headlamps only
- Automatic headlamp leveling - Xenon headlamps only.
Manual Headlamp Leveling - Halogen Headlamps Only
NOTE:
Headlamp leveling is not available on NAS vehicles with halogen headlamps.
The manual system comprises the following components:
- Two headlamp leveling motors
- Headlamp leveling rheostat rotary control
- Manual headlamp leveling (Halogen cars).
In PM6 or above the motors in the lamps are driven from the extended ignition relay in the CJB (central junction box), via a fuse to each lamp motor.
Movement of the leveling rotary control produces a variable voltage output (hardwired connection). The motors react to the supplied voltage and move the headlamp to the requested position which relates to the supplied voltage from the leveling rotary control. The headlamps can be lowered from their unladen position to compensate for changes in vehicle attitude due to loading.
The manual headlamp leveling rotary control has no defined positions which relate to the vehicle loading. The approximate rotary thumbwheel control position for a given loading is shown in the following table:
Automatic Headlamp Leveling - Xenon Headlamps Only
Automatic headlamp leveling is only available on vehicles with xenon headlamps. The system is not a Dynamic headlamp leveling system and changes in vehicle inclination due to positive and negative acceleration are not compensated.
Automatic headlamp leveling provides for the static, periodic adjustment of the vertical aim of the headlamps to minimize glare to other road users when the vehicle attitude changes due to loading.
Automatic headlamp leveling is controlled by a headlamp leveling module which is located on the bulkhead, adjacent to the instrument panel on the passenger side 'A' pillar.
NOTE:
On vehicles with the AFS system, the headlamp leveling software is incorporated into the AFS control module and the module is known as the AFS control module.
The headlamp leveling system comprises the following components and information from other vehicle systems:
- Front and rear vehicle height sensors
- Two headlamp leveling, vertical adjustment motors
- Headlamp leveling module (or AFS control module if vehicle is fitted with AFS)
- Ignition in power mode 6 or above.
When the ignition is in power mode 6 or above, power is supplied, via the extended ignition relay in the CJB (central junction box), to the light control module, the headlamp leveling motors (or AFS motors if fitted) and to the headlamp leveling module (or AFS control module if fitted).
When the light switch is moved to the side lamp or headlamp position, a LIN (local interconnect network) bus message is passed from the steering wheel module to the CJB (central junction box) for the selected function. The CJB (central junction box) then issues a 'lights on' message on the high speed CAN (controller area network) bus to the headlamp leveling module (or AFS control module if fitted).
The headlamp leveling module (or AFS control module if fitted) uses signals from the front and rear height sensors to periodically re-align the vertical aim of the headlamps to their optimum position.
DAYTIME RUNNING LAMPS (DRL)
DRL are a market requirement in certain countries. For additional information, refer to: Daytime Running Lamps (DRL) (417-04 Daytime Running Lamps (DRL), Description and Operation).
FRONT FOG LAMP
Front fog lamps are available as an option or standard fitment on vehicles fitted with HID headlamps and headlamp powerwash.
Two front fog lamps are located in apertures in the front bumper. Each lamp is secured in the bumper with 3 Torx screws which are covered with a removable finisher. The fog lamp has an adjuster which is used to set the fog lamp to the correct alignment.
The fog lamp uses an LED (light emitting diode) light source.
The front fog lamps are controlled by the CJB (central junction box). When the ignition switch is in ignition power mode 6 or above and the light control module rotary switch is in the side lamp or headlamp position or Auto position (and Rain Light Senor is requesting Dip Beam), the front fog lamp button can be pressed to activate the front fog lamps. A front fog lamp warning indicator is illuminated in the instrument cluster when the front fog lamps are active.
Front Fog Lamp Functionality (NAS and Canadian Markets Only)
The front fog lamps operate as described previously but with the following differences which cover local laws governing lamp usage.
If the low beam headlamps and the front fog lamps are on at the same time, when the high beam headlamps are switched on, the front fog lamps will be automatically switched off. When the high beam headlamps are subsequently switched off, the front fog lamps will be switched on automatically.
NOTE:
The front fog lamps will also be switched off if the high beam 'flash' function is operated.
REAR LAMP ASSEMBLY
The rear lamp assembly is a one piece unit which contains a stop/tail lamp, a turn signal indicator lamp and a reversing lamp.
The rear lamp assembly is located in a recess in the vehicle body. One stud on the outer edge of the lamp housing locates in a plastic clip on the vehicle body. The lamp is secured with two screws which are located on the inner edge of the lamp housing, near the tailgate aperture. In order to access the screws, removal of a small cover in the lamp housing is required.
Rear Stop/Tail Lamp
The upper lamp is a combined LED (light emitting diode) matrix for stop and tail lamp. The stop lamp is activated when the ignition is in the ignition power mode 6 and the brake pedal switch is active (by depressing the brake pedal). The high mounted stop lamp will also be activated when the brake pedal is pressed. The stop lamps can also be activated by the ABS (anti-lock brake system) when Hill Descent Control (HDC) is active. The ABS (anti-lock brake system) module send a high speed CAN (controller area network) bus message to the CJB (central junction box) which supplies power to the stop lamps and high mounted stop lamp. The side lamps are operated by selecting side lamps or headlamps on the light switch module. The side lamps are operational at all times and are not dependent on the ignition power mode 6. The side lamps will also be illuminated when the light
switch module is in the AUTO position and a 'lights on' signal is received by the CJB (central junction box) from the rain/light sensor.
Turn Signal Indicator Lamp
The turn signal indicator lamp is located next to the stop/tail lamp and uses a Silvervision 24W bulb.
The turn signal indicator lamps are operated by the left hand steering column multifunction switch or by the hazard flasher switch. The steering column multifunction switch is only active with the ignition in the ignition power mode 6, the hazard flasher switch is active at all times. When active, the turn signal indicator lamps will flash at a frequency cycle of 400ms on 400ms off.
If a bulb fails, the remaining turn signal indicator lamp bulb on that side of the vehicle flashes at normal speed. The applicable turn signal indicator in the instrument cluster will flash at double speed to alert the driver to the bulb failure.
Reversing Lamp
The reversing lamp is located adjacent to the turn signal lamp and uses a 16W bayonet fitting bulb.
The reversing lamp is active when the ignition is in the ignition power mode 6 and the CJB (central junction box) receives a reverse selected signal on the high speed CAN (controller area network) bus. The automatic transmission has a reverse switch which senses when reverse is selected and send the state out on CAN (controller area network). The manual gearbox has a hardwired signal to the CJB (central junction box).
Rear Fog Lamp
The rear fog lamp is located in the bumper and uses a 19W bayonet fitting bulb.
The rear fog lamp is controlled by CJB (central junction box). When the ignition switch is in the ignition power mode 6 or greater and the light control module is in the side lamp or headlamp position, the rear fog lamp switch on the lighting stalk can be pressed to activate the rear fog lamps. A rear fog lamp warning indicator is illuminated in the instrument cluster when the rear fog lamps are active.
Side Marker Lamp
The side marker lamp is located in the outer part of the rear lamp, adjacent to rear fog lamp and uses LED (light emitting diode).
The side marker lamp is active at all times when the side lamps are selected on using the light control module. The side marker lamps will also be illuminated when the light control module rotary switch is in the 'AUTO' position and a 'lights on' signal is received by the CJB (central junction box) from the light sensor.
HAZARD FLASHERS
The hazard flashers are controlled by a non-latching switch in the center of the instrument panel. The hazard flashers operate at all times when selected and are not dependent on the ignition power mode.
When the hazard flashers are selected on, all of the front, rear and side turn signal indicator lamps operate as previously described and both left and right turn signal indicators in the instrument cluster also flash. The hazard warning flashers flash at a rate of 400ms on and 400ms off. When the hazard flashers are active, they override any request for turn signal lamp operation.
If a trailer is fitted, the trailer turn signal lamps will flash at the same frequency as the vehicle indicators. The trailer warning indicator in the instrument cluster will also flash. If a trailer bulb is defective, the trailer warning indicator will not flash.
The hazard flashers can also be activated by a crash signal from the RCM (restraints control module). This is received by the CJB (central junction box) which activates the hazard flashers. The hazard flashers can be cancelled when crash mode is cancelled by the restraints control module.
LICENSE PLATE LAMPS
Two license plate lamps are fitted in the tailgate handle, above the license plate in the upper tailgate. Each lamp uses LED (light emitting diode).
The lamps are secured in the upper liftgate handle with integral clips. The lamps can be released from the handle using a small, flat blade screwdriver. The license plate lamps are active at all times when the side lamps or headlamps are switched on.
HIGH MOUNTED STOP LAMP
The high mounted stop lamp is located in the liftgate. Access to the lamp is by removal of the upper liftgate interior trim panel. After releasing the lamp retaining clips, the lamp can be removed from outside the vehicle.
The lamp comprises a plastic housing with a red colored lens. The lamp is illuminated by LED (light emitting diode)s.
The high mounted stop lamp is activated, along with the tail lamp stop lamps, when the ignition is in ignition power mode 6 or above and the brake pedal switch is active (by pressing the brake pedal).
The high mounted stop lamp and the stop lamps can also be activated by the ABS (anti-lock brake system) when Hill Descent Control (HDC) is active. A signal on the high speed CAN (controller area network) bus from the ABS (anti-lock brake system) module is passed to the CJB (central junction box) which supplies power to the stop lamps.
SIDE TURN SIGNAL LAMPS
The side turn signal lamps are located in the external rear view mirrors.
The side turn signal lamps use LED (light emitting diode). The lamps have the same functionality as the front and rear turn signal indicator lamps and are operated by the left hand steering column multifunction switch or by the hazard flasher switch. The steering column multifunction switch is only active with the ignition in the ignition power mode 6, the hazard flasher switch is active at all times, regardless of the power mode. When active, the side turn signal lamps will flash at a frequency cycle of 400ms on and 400ms off. If a side turn signal lamp bulb fails, the turn signal indicator lamps continue to flash at the normal rate.
TRAILER LIGHTING
Several different types of trailer socket can be fitted to the vehicle depending on market specifications. Refer to the Electrical Reference Library for specific socket details.
The CJB (central junction box) monitors the turn signal indicator lamps and can detect if more than two lamps are fitted (the side turn signal lamps are not monitored). When a trailer is detected, the trailer warning indicator in the instrument cluster will flash in synchronization with the turn signal indicators.
If one or more of the turn signal indicator lamps on the vehicle or the trailer are defective, the trailer warning indicator will not flash to alert the driver to the bulb failure.
DIAGNOSTICS
The diagnostic socket is located in the lower instrument panel closing panel, on the driver's side, below the steering column. Various lighting system functions are monitored by different systems which can store fault information. This can be retrieved using a Land Rover approved diagnostic system.