Part 2

Exterior Lighting

AFS Control Module
The AFS control module is located on the bulkhead, at the bottom of the RH (right-hand) 'A' pillar. The AFS control module is a dual functionality unit which also incorporates software to control the headlamp leveling. The AFS control module is connected to the high speed CAN (controller area network) bus and receives inputs from other vehicle systems on the status of the following parameters:
- Steering angle
- Vehicle speed
- Headlamp status
- Engine running
- Reverse gear selected
- AUTO lights on.
The AFS will only operate when the AFS control module receives an engine running signal on the high speed CAN (controller area network) bus from the ECM (engine control module). When the engine running signal is received the AFS control module performs its initialization routine.
The AFS will also function when the lighting control switch is in the AUTO position and the AFS control module receives a lights on signal from the light sensor and an engine running signal.
The AFS control module then monitors the inputs from the other vehicle systems to control the AFS functionality according to cornering angles and vehicle speed.
The AFS control module is connected to each AFS power module on a private Local Interconnect Network (LIN) bus. The power modules read operating values supplied from the AFS control module and control the output drivers for the stepper motor actuators inside the headlamp assembly.

AFS Operation
The AFS controls the swiveling angle of each projector module using speed and steering angle signals. The angles of each projector module differ to give the correct spread of light, for example, when turning left, the LH (left-hand) projector module will have a greater swiveling angle than the RH (right-hand) projector module.

Initialization Procedure
When the AFS control module receives an ignition mode on signal, the control module performs the initialization procedure which ensures that the headlamps are correctly aligned on both their vertical and horizontal axes.
The headlamp leveling motors are powered from their current position, which can be either the upper or lower limit or somewhere in between, to their lower position and then back to the 0 degrees position.
The AFS swivel initialization starts less than 1 second after the headlamp leveling initialization is activated to ensure that the headlamps are at or below the 0 degree position in the vertical axis, thus preventing glare to oncoming vehicles. The AFS swivel initialization is completed in less than 2.5 seconds. The LH (left-hand) and RH (right-hand) AFS actuator motors are powered from the 0 degree position to their fully inboard position, then to their fully outboard position and then back to the 0 degree position.

Failure Mode
In the event of a failure of the AFS system, a warning indicator in the instrument cluster is illuminated to warn the driver. The AFS warning indicator illuminates when the ignition is in the ignition on mode and will flash continuously until the fault is rectified. The AFS warning indicator will also be illuminated if a failure of the steering angle sensor or the vehicle speed signal is detected.
Illumination of the 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 preventing the AFS system from operating correctly.
The AFS control module performs a diagnostic routine every time AFS is requested. If any fault is found, the AFS control module will suspend the operation of the AFS function.
If the AFS leveling system has failed with the projector module in a position other than the correct straight ahead position, the AFS control module will attempt to drive the projector module to a position a small amount lower than the standard position. If the swivel function has failed, the AFS control module will lower the projector module using the leveling actuator to a position much lower than standard to prevent excess glare to oncoming vehicles.
The AFS control module software can detect an internal failure of the control module control circuits. The control module will power the projector modules to the zero position and prevent further operation.
Faults can be investigated by interrogating the AFS control module using an approved Jaguar diagnostic system to check for fault codes.

AUTOMATIC HEADLAMP OPERATION
The automatic headlamp function is a driver assistance system. The driver can override the system operation by selection of side lamp or headlamp on if the ambient light conditions require front and rear lighting to be active. The automatic headlamp system uses a light sensor and the AJB, which is connected to the instrument cluster, via the medium speed CAN (controller area network) bus, to control 'AUTO' headlamp functionality.
The light sensor is located in the centre of the instrument panel upper surface. The sensor has three functions; houses the alarm system LED (light emitting diode), auto lamp function for AUTO headlamps and sun load sensor for the A/C (air conditioning) system.
The sensor is hardwired to the instrument cluster which supplies a 5V current via a pull-up resistor to 2 photodiode light sensors within the sensor housing. The ambient light signals are returned to the instrument cluster by the light sensor varying the current drawn from the 5V output, hence varying the voltage at the 'pull-up' resistor. The instrument cluster then outputs a message relating to the ambient light level on the medium speed CAN (controller area network) bus. The AJB receives the message and determines if AUTO lamps are required to be activated.
Operation of the 'AUTO' headlamps requires the ignition to be in the ignition mode and the lighting control switch must be in the AUTO position. The AJB will only activate the AUTO headlamps on receipt of a valid ambient light signal on the medium speed CAN (controller area network) bus from the instrument cluster.

HEADLAMP LEVELING
Headlamp leveling provides for the automatic adjustment of the vertical aim of the headlamps. The leveling system is required to minimize glare to other road users when the vehicle attitude changes due to braking or acceleration.
Headlamp leveling is controlled by a headlamp leveling module which is located on the bulkhead, at the bottom of the RH (right-hand) '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 on mode
- Vehicle speed information form ABS (anti-lock brake system) module.
When the ignition is in the ignition power mode, power is supplied via the ignition relay in the battery junction box to the headlamp leveling module (or AFS control module if vehicle is fitted with AFS).

NOTE:
When the headlamp leveling module receives a power supply from the ignition relay, the module performs an initialization procedure to correctly align the vertical aim of the headlamps and to determine if the leveling motors are functioning correctly.
The headlamp leveling module receives information relating to vehicle attitude from the front and rear height sensors. The headlamp leveling module processes these signal and provides an output to the headlamp leveling motors to adjust the headlamp vertical aim according to vehicle speed and attitude.

DAYTIME RUNNING LAMPS
Refer to the DRL (daytime running lamps) section for details. For additional information, refer to Daytime Running Lamps (DRL) Description and Operation

FRONT FOG LAMP









Two front fog lamps are located in apertures in the front bumper. The fog lamps are different in design between the naturally aspirated and supercharged vehicles.

Front Fog Lamp - Naturally Aspirated Vehicles
The front fog lamp is a conventional design with a clear lens and smooth surface reflector. An H11 55W halogen bulb is located at the rear of the fog lamp. The bulb has an integral holder and can be removed by rotating counter clockwise to remove from the lamp housing.
Fog lamp beam adjustment is provided by a rotary adjuster located on the underside of the lamp and is accessible from the rear of the bumper.
The front fog lamps are controlled by the auxiliary lighting switch and the CJB (central junction box). Refer to the Auxiliary Lighting Switch section for switch operation.

Front Fog Lamp - Supercharged Vehicles
The front fog lamp is projector module, similar in design to the projector module used in the Xenon headlamp. A halogen H3 bulb is located in the rear of the lamp and secured with a spring clip. The bulb has a power lead which is secured to the rear of the lamp connector socket.
Fog lamp beam adjustment is provided by a screw at the top of the lamp. The screw is accessible from the front of the lamp.
Front fog lamp control and operation is as described for 'Front Fog Lamp - Naturally Aspirated Vehicles.

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 2 piece unit, with one part being located in the rear quarter panel and the second part being attached to the liftgate. The outer rear lamp assembly is located in a recess in the vehicle body and is secured with 2 nuts which screw onto studs in the lamp assembly. The inner rear lamp assembly is located in a recess in the liftgate and is secured with 3 nuts.









Rear Stop and Side Lamp
The stop and side lamp are located in the lower section of the outer rear lamp assembly. A combined, twin filament 21W/5W bayonet fitting bulb is used. The stop lamp uses the 21W bulb filament and the side lamp uses the 5W bulb filament. The bulb is located in a holder which connects with contacts in the rear lamp housing. The holder can be released by rotating and pulling from the aperture.
The stop lamps are active when the ignition is in the ignition mode and the stop lamp switch is activated by pressing the brake pedal. The high mounted stop lamp will also be activated when the brake pedal is pressed. Operation of the stop lamp switch is sensed by the CJB (central junction box) which sends a message on the high speed CAN (controller area network) bus to the AJB which activates the stop lamps.
The stop lamps can also be activated by the adaptive speed control system. A signal from the adaptive speed control module is sent via the high speed CAN (controller area network) bus to the AJB which activates the stop lamps until an off message is received.
The side lamps are operated by selecting side lamps or headlamps on the lighting control switch. The side lamps are operational at all times and are not dependant on the ignition mode. The side lamps will also be illuminated when the lighting control switch is in the AUTO position and a 'lights on' signal is received by the CJB (central junction box) from the light sensor.

Turn Signal Indicator Lamp
The turn signal indicator lamp is located in the upper section of the outer rear lamp assembly and uses a PY21W bayonet fitting bulb. The bulb is located in a holder which connects with contacts in the rear lamp housing. The holder can be released by rotating and pulling from the aperture.
The turn signal indicator lamps are operated by the LH (left-hand) steering column multifunction switch or by the hazard flasher switch. The steering column multifunction switch is only active when the ignition is the ignition mode. The hazard flasher switch is active at all times. When active, the turn signal indicator lamps flash at a frequency cycle of 400 ms on and 400 ms off.
If a bulb fails, the remaining turn signal indicator lamps continue to flash at the normal speed. The applicable turn signal indicator in the instrument cluster will flash at double speed to indicate the failure to the driver.

Reversing Lamp
The reversing lamp is located in the inner rear lamp assembly. The reversing lamp uses 3 LED (light emitting diode). Only one reversing lamp is fitted and is located in the LH (left-hand) inner lamp assembly on RHD (right-hand drive) vehicles and in the RH (right-hand) inner lamp assembly on LHD (left-hand drive) vehicles.
The reversing lamp is activated on receipt of reverse selected message sent on the medium speed CAN signal from the TCM (transmission control module) to the AJB.

Rear Fog Lamp
The rear fog lamp is located in the inner rear lamp assembly. The fog lamp uses 3 LED (light emitting diode)'s. Only one fog lamp is fitted and is located in the RH (right-hand) inner lamp assembly on RHD (right-hand drive) vehicles and in the LH (left-hand) inner lamp assembly on LHD (left-hand drive) vehicles.
The rear fog lamp is controlled by the auxiliary lighting switch and the CJB (central junction box). The rear fog lamp switch receives a power supply from the instrument cluster. When the rear fog lamp switch is pressed, a ground path is completed through a resistor. The current flow is monitored by the instrument cluster which determines that the switch has been pressed. The instrument cluster transmits a rear fog lamp on request message on the medium speed CAN (controller area network) bus to the AJB which activates the power supplies to the fog lamp provided the lighting switch is in the correct position and the ignition mode is correct.
When the ignition is in ignition on mode and the lighting control switch is in the side lamp or headlamp position and the front fog lamps are on, pressing the rear fog lamp switch on the auxiliary lighting switch will activate the rear fog lamp. Pressing the rear fog lamp switch for a second time will switch the rear fog lamp off. The rear fog lamp will also be deactivated if the lighting control switch is moved to the off position or the ignition mode is changed to off mode.

LICENCE PLATE LAMPS
Two license plate lamps are located in the underside of the liftgate (hardtop) or luggage compartment lid (convertible) exterior trim finisher. Each lamp uses a W5W capless bulb which is located in a holder at the rear of the lamp.
The lamp can be removed from the finisher by using a wide flat blade screwdriver or similar tool, inserting it in the slot between the lamp lens and the finisher and gently levering the lamp from the surround. The bulb is pushed into a holder which in turn is a press fit in the lamp housing.
The license plate lamps are illuminated at all times when the side lamps are active.

HIGH MOUNTED STOP LAMP
The high mounted stop lamp is located in the rear spoiler on the upper edge of the liftgate or luggage compartment lid. The lamp comprises 24 separate LED (light emitting diode)'s which illuminate through a red colored lens. The high mounted stop lamp functionality is the same as that described for the stop lamps.

TURN SIGNAL INDICATOR REPEATER LAMP
The turn signal indicator repeater lamps are located in each front fender and can be removed by sliding the lamp assembly rearwards and releasing the front edge from the fender. The lamps use a 5W capless bulb which is located in a holder in the rear of the lamp housing.
The repeater lamps have the same functionality as described for the turn signal indicators and the hazard flashers.

HAZARD FLASHERS
The hazard flashers are controlled by a non-latching switch located in the centre of the instrument panel. The hazard flashers operate at all times when selected and are not dependant on an ignition mode to be selected.
When the hazard flashers are selected on by the driver, a ground path is momentarily completed to the AJB which activates the front and rear and side repeater turn signal indicators. A second press of the switch is again sensed by the AJB and the hazard flasher will be deactivated. When the hazard flasher are active, they override any request for turn signal indicator operation.
The hazard flashers can also be activated by a crash signal from the RCM (restraints control module). The signal is received on the medium speed CAN (controller area network) bus from the instrument cluster by the AJB which activates the hazard flashers. The hazard flasher can be cancelled by changing the ignition mode to accessory or off mode and then changing it to ignition on mode on or the crash mode signal is removed by the RCM (restraints control module).

CONTROL DIAGRAM

NOTE:
A = Hardwired; D = High speed CAN bus