Land Rover Body And Paint Air Bag And Safety Belt Rover Manual
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Exterior Lighting Component Location Adaptive Front lighting System (AFS) control module 1Central Junction Box (CJB)2 Hazard warning lamp switch3 (G421288) Technical Training162 Lesson 2 – ElectricalExterior Lighting
Rain/light sensor4 LH steering column multifunction switch5 Instrument cluster6 Lighting control switch7 Side turn signal lamp8 High mounted stop lamp9 License plate lamps10 Reflector11 Rear lamp assembly12 Stop lamp switch13 Headlamp assembly14 Front fog lamp15 LH Front fog lamp relay (if fitted)16 GENERAL The exterior lighting system comprises the following exterior lamps: •Front and rear side lamps •License plate lamps •Side marker lamps (if fitted) •Front and rear turn signal lamps •Side turn signal lamps •Stoplamps and high mounted stop lamp •Reversing lamps •Rear fog lamps •Front fog lamps (if fitted) •Cornering/Static bending lamps (if fitted) - All except NAS •Low and high beam headlamps The exterior lighting system comprises two new features not used on previous Land Rover vehicles; cornering/static bending lamps and Adaptive Front lighting System (AFS). Further details are contained within this section. Exterior Bulb Type/Rating The following table shows the bulbs used for the exterior lighting system and their type and specification. RatingTypeBulb 55WHalogen H7Halogen Headlamps - Low/High beam 35WXenon D2SXenon headlamps - Low/High Beam 55WHalogen H7Headlamps - High Beam 55WHalogen H11Front fog lamps 21WBayonet P21Rear fog lamps 27W/7W Note: 7W fila- ment not func- tional Capless S8W Wedge Turn signal lamps - Front 5WCapless W5W Side turn signal lamps 21WBayonet P21Turn signal lamps - Rear 5WCapless W5W Side lamps - Front 21W/5W Note: 21W filament not functional on lower tail lamp Bayonet - Twin fila- ment P21/5 Stop/Tail lamps Exterior LightingLesson 2 – Electrical 163Technical Training (G421288)
RatingTypeBulb -LEDsHigh mounted stop lamp 5WCapless W5W License plate lamps 21WBayonet P21Reverse lamps 35WHalogen H8Cornering lamp/Static bending lamp 3WCapless W3W NAS - Side marker lamp (front/rear) CENTRAL JUNCTION BOX The Central Junction Box (CJB) is an integrated unit located behind the fascia on the passenger side of the bulkhead. The CJB contains fuses, relays and a number of microprocessors which control the power supply and functionality of the lighting system and other vehicle systems. Input Signals The CJB receives inputs from the following switches: •Lighting control switch •Side lamp position •Headlamp position •Automatic (AUTO) position (if fitted) •Brake switch •Left hand steering column multifunction switch for turn signal indicators and high beam/headlamp flash •Hazard flasher switch •Rain/light sensor (LIN signal) Circuit Protection The CJB provides circuit protection for all exterior lighting circuits. Most exterior lighting circuits are protected by conventional fuses, however, the following circuits are protected by Field Effect Transistors (FETs). •Low beam •High beam •Cornering/static bending lamps •Turn signal lamps •Trailer turn signal lamps. Operation of the above listed circuits is protected by FETs which can detect overloads and short circuits. The FETs respond to heat generated by increased current flow caused by a short circuit. On a normal circuit this would cause the fuse to blow. The FETs respond to the heat increase and disconnect the supply to the affected circuit. When the fault is rectified or the FET has cooled, the FET will reset and operate the circuit normally. If the fault persists the FET will cycle, disconnecting and reconnecting the power supply. The CJB stores fault codes which can be retrieved using T4. The fault code will identify that there is fault on a particular output which will assist with fault detection. Alarm Indications The exterior lighting system is used for alarm arm and disarm requests. When the driver locks the vehicle, a visual indication of a successful lock request is displayed to the driver by the hazard flashers operating three times with a pattern of 500ms on and 500ms off. When the driver unlocks the vehicle, a visual indication of a successful unlock request is displayed to the driver by the hazard flashers operating once for 3 seconds. If the alarm is triggered, the hazard flashers are operated for ten 30 second cycles of on for 380ms and off 380ms with a 5 second off delay between each cycle. (G421288) Technical Training164 Lesson 2 – ElectricalExterior Lighting
Lights on Warning Chime When the ignition switch is in the off (0) or auxiliary (I) position and the lighting control switch is in the side lamp or headlamp position, a warning chime will sound if the drivers door is opened. This indicates to the driver that the exterior lights have been left on. The chime is generated from the instrument cluster sounder on receipt of a lights on signal, a door open signal and an ignition switch off signal from the CJB on the CAN bus. Crash Signal Activation When a crash signal is transmitted from the restraints control module, the CJB activates the hazard flashers and the turn signal indicators in the instrument cluster. The hazard flashers will continue to operate until the ignition switch is moved to the auxiliary position I or the position O or the restraints control module no longer transmits the crash signal. Headlamp Timer The CJB controls a headlamp timer function which allows the headlamps to remain on for a period of time after leaving the vehicle. This is a driver convenience feature which illuminates the driveway after leaving the vehicle. To select this feature, the lighting control switch must be in the headlamp or side lamp position when the ignition switch is moved from the ignition position to off. The lighting control switch must be moved to the off position or AUTO position (if fitted) to activate the timer. The timer function will then be initiated and low headlamps will be illuminated for the selected timer period. The timer period is selectable by the driver and can range from off to 60 seconds in 10 second increments. The default timer period is set at 20 seconds. The default setting can be changed by a Land Rover or authorised dealer or by the driver using the vehicles customer personalisation options. With the vehicle stationary and the ignition switch in any position, pressing the trip computer button on the end of the left hand steering column multifunction switch gives access to the options. The options can be scrolled through using the audio search buttons on the steering wheel. The options are displayed in the message centre. When the headlamp timer option is reached, the settings can be changed using the audio search buttons on the steering wheel. When the selection has been made confirmation is performed by pressing the trip computer button. NOTE: The headlamp timer feature will be cancelled under the following conditions: •The ignition switch is moved from auxiliary (I) to ignition (II) •The lighting control switch is moved from off to side lamps. The headlamp timer can also be operated using the ignition key personal button, if this feature has been set by the driver. LIGHTING CONTROL SWITCH The lighting control switch is located in the drivers side of the instrument panel, below the outer fresh air vent. The switch contains a rotary switch for selecting the vehicle exterior lighting functions, a rheostat for manual headlamp levelling (if fitted) and an instrument illumination dimmer rheostat. Three variants of the switch are available to cover the different vehicle specifications and market variations. Exterior LightingLesson 2 – Electrical 165Technical Training (G421288)
NOTE: High line lighting control switch shown OFF position1 Side lamps position2 Headlamps position3 Automatic headlamps position (if fitted)4 Headlamp levelling control (if fitted - only applicable to vehicles with coil spring suspension) 5 Instrument illumination dimmer control6 Rotary control switch7 All outputs from the lighting control switch, with the exception of the dimmer control output and the headlamp levelling control output (if applicable), are subject to a voltage drop through the switch of approximately 200mV. Therefore, assuming that the input voltage to the switch is 12V, then the voltage measured at the switch output pins will be 11.8V. Rotary Control The rotary control can be rotated to select one of four positions; off, side lamps, headlamps and automatic (AUTO). On vehicles without the automatic feature the switch only has three positions. Three additional positions for fog lamps are available by pulling the rotary control; all fog lamps off, front fog lamps on only and front and rear fog lamps on. On vehicles without front fog lamps the switch can only be pulled once to activate the rear fog lamps. On vehicles fitted with front fog lamps, the rotary control can be pulled to select fog lamps when it is in the side lamps or headlamps positions. On vehicles without front fog lamps the rotary control can only be pulled to select rear fog lamps when it is in the headlamps position. The fog lamps will be switched off automatically when the rotary control is turned to the off position or pushed in to the fog lamps off position. (G421288) Technical Training166 Lesson 2 – ElectricalExterior Lighting
Manual Headlamp Levelling Control (if fitted) The manual headlamp levelling control is only available on vehicles with coil spring suspension and is used to lower the headlamps when an excessive load is placed on the rear of the vehicle, altering the vehicle attitude and raising the headlamp beam. The control uses a rotary thumbwheel which is connected to a rheostat which gives a variable output to the levelling stepper motors. The motors respond to the output and move to adjust the headlamp position as required. The control has three marked positions; 0 to 3. The rotary wheel moves in 8, half positions to give fine adjustment control over the headlamp position. The positions relate to vehicle loading or driving conditions as follows: Position 0 is the normal position for unladen driving. Positions 1 to 4 lower the headlamp beam to compensate for a drop in height of the rear of the vehicle. •0 = Driver only or driver and front seat passenger •0.5 = Driver, front seat passenger and 3rd row seats occupied (7 seat models) or all seats occupied (5 seat) models •1 = All seat occupied (7 seat models) •1.5 = All seats occupied and maximum rear axle loading •2 = Driver only and maximum rear axle loading •3 and 4 = Can be used under certain driving conditions, i.e. off-road Dimmer Control The dimmer control provides a Pulse Width Modulated (PWM) output to control the illumination brightness of the instrument panel and other fascia illumination. The dimmer switch operates using a rotary thumbwheel which is connected to a rheostat and a high side switch. The rheostat is a variable resistor which provides a high or low resistance according to its set position. This output is passed to a switchable capacitor or a high side switch. The high side switch uses the output from the rheostat to determine the switching frequency of the capacitor which provides the PWM output of between 8 and 12V to determine the brightness of the illumination. Automatic Headlamps Refer to Automatic Headlamps in this section. HEADLAMP ASSEMBLY Three types of headlamp are available; Halogen, Bi-Xenon or Adaptive Front lighting System (AFS). The headlamps share a common, clear lens. The headlamps are located behind the front carrier assembly. Each headlamp is secured to the front carrier assembly with two locking plates. The locking plate slides in grooves in the rear of the headlamp and two holes in each plate locate on pins on the carrier. Each locking plate is pressed down to lock the pins in the locking plate holes. The locking plates allow removal of the headlamp from the carrier for bulb changing without the requirement for special tools. The rear of the headlamp unit has removable access panels which allow access to the bulbs for replacement. A large cover, which is rotated anti-clockwise to remove, allows access to the low/high beam bulb on both halogen and xenon headlamps. Another removable cover provides access to the high beam only halogen bulb which is retained with a spring clip. A smaller cover can also be rotated anti-clockwise to provide access to the turn signal lamp bulb. Below this cover is a removable cover which provides access to the side lamp bulb, the cornering lamp/static bending lamp bulb and the side marker lamp bulb on NAS models. Exterior LightingLesson 2 – Electrical 167Technical Training (G421288)
The headlamps have two adjustment screws on the rear which allow for the manual setting of the vertical and horizontal alignment. Refer to the Service Repair Procedures manual for headlamp alignment data. Each headlamp has an integral sixteen pin connector which provides inputs and outputs for the various functions of the headlamp assembly. The usage of the pins differs between model variants, refer to the Electrical Reference Library (ERL) for pin details. The low beam headlamps are switched on when the ignition switch is in the ignition position (II) and: •the lighting control switch is in the headlamp position •the lighting control switch is in the AUTO position and a lights on signal is received by the CJB from the rain/light sensor. The low beam headlamps can also be operated by the headlamp delay feature. The high beam headlamps are switched on when the ignition switch is in the ignition position (II) and: •the low beam headlamps are selected on in the headlamp position or activated via the AUTO feature •The left hand steering column multifunction switch is pushed forward away from the driver. The high beam headlamps will be switched off when: •The left hand steering column multifunction switch is moved rearward towards the driver •The low beam headlamps are switched off •The ignition switch is moved to the auxiliary position (I) or off position (0). (G421288) Technical Training168 Lesson 2 – ElectricalExterior Lighting
Halogen Headlamps Locking plate1 Turn signal lamp2 Side marker lamp (NAS only)3 Side lamp4 Cornering lamp (if fitted)5 Low/high beam headlamp6 High beam headlamp7 High beam lamp access cover8 Low/high beam lamp access cover9 Side lamp access cover (hidden)10 Turn signal lamp access cover (hidden)11 Exterior LightingLesson 2 – Electrical 169Technical Training (G421288)
The halogen headlamps use a complex surface reflector for both the low beam lamp and the halogen fill in high beam lamp. This type of reflector has the reflector divided into separate parabolic segments, with each segment having a different focal length. The halogen headlamps require adhesive decals to be applied to the clear outer lens to mask the beam cut-off when driving in opposite drive hand markets. The low and high beam bulbs are quartz halogen H7, with a rating of 55W. The bulbs are retained in the headlamp unit with conventional wire retaining clips. Xenon Headlamps Locking plate1Turn signal lamp2 (G421288) Technical Training170 Lesson 2 – ElectricalExterior Lighting
Side marker lamp (NAS only)3 Side lamps4 Cornering lamp (if fitted)5 Xenon low/high beam lamp6 Halogen high beam lamp7 High beam lamp access cover8 Xenon control module9 Low/high beam lamp access cover10 Side lamp access cover (hidden)11 Turn signal lamp access cover (hidden)12 Safety Precautions WARNING: The Xenon system generates up to 28000 volts and contact with this voltage could lead to fatality. Make sure that the headlamps are switched off before working on the system. The following safety precautions must be followed when working on the xenon headlamp system: •DO NOT attempt any procedures on the xenon headlamps when the lights are switched on. •Handling of the D2S Xenon bulb must be performed using suitable protective equipment, e.g. gloves and goggles. The glass part of the bulb must not be touched. •Xenon bulbs must be disposed of as hazardous waste. •Only operate the lamp in a mounted condition in the reflector. The xenon headlamps use a complex surface reflector for the Halogen fill in high beam lamp only lighting unit, which is of the same design as the high beam unit used on the Halogen headlamps. This type of reflector has the reflector divided into separate parabolic segments, with each segment having a different focal length. The high beam bulbs are quartz halogen H7, with a rating of 55W. The bulbs are retained in the headlamp unit with conventional wire retaining clips. The xenon headlamp is known as bi-xenon and operates as both low beam and high beam headlamp unit. The xenon lamp or High Intensity Discharge (HID) lamp as they are sometimes called, comprises an ellipsoidal lens with a solenoid controlled shutter to change the beam output from low to high beam. NOTE: If the lighting control switch is in the OFF position, the xenon lamps do not operate when the high beam flash function is operated. If the lighting switch is in the headlamps position or AUTO position with the low beam lamps active, the xenon low beam will remain on when the high beam flash function is operated. The xenon headlamp system is controlled by the CJB using a control module for each headlamp and an igniter. The control modules and the igniters provide the regulated power supply required to illuminate the xenon bulbs through their start-up phases of operation. Exterior LightingLesson 2 – Electrical 171Technical Training (G421288)