Interior Lighting Land Rover Range Rover Sport L320

Scheme 1

GENERAL

The interior lighting system comprises the following interior lamps

1. Main interior lamp
2. Map reading lamps
3. Glove compartment lamp
4. Luggage compartment lamp
5. Vanity mirror lamps
6. Footwell lamps
7. Puddle lamps
8. Ignition switch illumination
9. Door mirror approach lamps (if fitted).

Interior Bulb/Type Rating

The following table shows the bulbs used for the interior lighting system and their type and specification.

CENTRAL JUNCTION BOX

The Central Junction Box (CJB) is an integrated unit located behind the instrument panel 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 interior lighting system and other vehicle systems.

The interior lamps are controlled by the CJB and have two modes of operation: manual and automatic. In the manual mode the interior lamps can be switched on and off using the momentary and latching switches adjacent to each lamp or disabled completely using the same switches. In the automatic mode the interior lamp functionality is controlled by the CJB on receipt of various input signals.

Input signals

The CJB receives the following inputs which affect the operation of the interior lamps

1. Ignition switch
2. Door switches
3. Tailgate switch
4. Glove compartment lamp switch
5. Unlock signal
6. Main interior lamp switch
7. Map reading lamp switches
8. Battery saver relay
9. Vanity mirror lamp switches.

Circuit Protection

The CJB provides circuit protection for all interior lamp circuits. The following interior lamp circuits are protected by Field Effect Transistors (FETs)

1. Main interior lamp
2. Luggage compartment lamp
3. Footwell lamps
4. Ignition switch glow ring
5. Door mirror approach lamps (if fitted)
6. Puddle lamps.

The above components are 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, rendering that component and circuit inoperative. 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.

The following interior lamps circuits are protected by Fuse 1P (10A) in the CJB

1. Glove compartment lamp
2. Map reading lamps
3. Vanity mirror lamps.

Interior Lamp Time-out

The interior lamps are controlled by a timer within the CJB which allows a 60 second delay period for the lamps to remain on after the ignition has been switched off or when the vehicle is unlocked. The following interior lamps are subject to the delay period

1. Main interior lamp
2. Footwell lamps
3. Luggage compartment lamp
4. Puddle lamps
5. Door mirror approach lamps (if fitted)
6. Ignition switch glow ring.

The delay period can be adjusted to suit the driver's requirements, refer to following section for adjustment details.

The time-out delay is activated when the CJB receives one of the following signals

1. The CJB receives an unlock signal from the remote handset
2. Ignition switch is moved from the crank position (III) or the ignition position (II) or to the auxiliary position (I) to the off position (0).

If a second occurrence of one of the above actions occurs within the time-out period, the timer will be reset and the delay period will start again.

The time-out delay is deactivated when the CJB receives one of the following signals

1. The CJB receives a lock signal from the remote handset
2. Ignition switch is moved from the off position (0) or the auxiliary position (I) to the ignition position (II) or the crank position (III).
3. The CJB receives a door opened signal (even if door is subsequently closed)

Interior Lamp Time-out Personalization

The vehicle's customer personalization options allow the driver or a Land Rover authorized dealer to adjust the interior lamp switch-off delay period to suit their specific requirements. The default delay period of 60 seconds can be adjusted to the following values; OFF, 10 seconds, 20 seconds, 40 seconds, 60 seconds, 120 seconds or 240 seconds.

With the vehicle stationary and the ignition switch in any position, pressing the trip computer button on the end of the left hand steering multifunction switch gives access to the Customer Personalization options. Using the audio search buttons on the steering wheel the options can be scrolled through. The options are displayed in the message center. When the interior lamp delay 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.

For additional information, refer to: Information And Message Center information.

Battery Saver

The battery saver feature provides automatic shut-off of the interior lamps after a period of 15 minutes in order to prevent excessive drain on the battery. The lamp(s) fade off as described in the 'Interior Lighting' section that follows.

The battery saver feature is additional to the time-out delay feature and prevents battery drain when a lamp is accidentally left switched on, e.g. glove compartment left open.

When the ignition switch is moved from the ignition position (II) or the auxiliary position (I) to the off position (0), the CJB starts a timer which automatically switches off all interior lamps when the 15 minute period has expired.

Once the timer has expired and the lamps are off, any one of the following will 'wake-up' the battery saver and the interior lamps will function again. The timer will be restarted as soon as an input from one of the following is received by the CJB

1. Ignition switch position changed to auxiliary (I), ignition (II) or crank (III)
2. Any door, including the tailgate is opened
3. Unlock request is received
4. Main interior lamp switch is pressed.

DELIVERY MODE

Delivery mode is set at the factory on vehicles to minimize battery drain. The mode enables the switching off of non-critical electrical components, including the interior lighting. The delivery mode feature can be cancelled by the dealer at pre-delivery inspection using T4.

CRASH ILLUMINATION

When a crash signal is received from the restraints control module, the CJB activates the interior lamps once the vehicle speed has reduced to 5 km/h (3.1 mph). The lamps remain on until they are switched off manually or the crash signal no longer exists.

For additional information, refer to: Air Bag And Safety Belt Pretensioner Supplemental Restraint System (SRS) information.

Interior lighting is provided to enable the safe entry and departure from the vehicle for the driver and passengers in low ambient light conditions, without any manual switching of the interior lamps.

Note. The term interior lamps also includes the door mirror approach lamps (where fitted).

When the interior lighting system switches the interior lamps on, the CJB ramps the lamps on up to full power over a period of 1.3 seconds. When the system switches the lamps off, after the time-out delay period has expired, the CJB fades the lamps off over a period of 2.6 seconds.

The interior lighting system will illuminate the interior lamps when one of the following events occurs

1. The CJB receives an unlock signal from the remote handset
2. Any door is opened including the tailgate
3. The ignition switch is turned from the ignition position (II) or the auxiliary position (I) to the off position (0).

The interior lighting system will turn off the interior lamps when one of the following events occurs

1. Once the delay time-out timer has expired since the lamps were either activated or the last door is closed and the vehicle is not locked
2. The ignition switch is in the off position (0) and an external lock (using the key or the remote handset) is requested with all doors closed
3. The ignition switch is turned from the off position (0) or the auxiliary position (I) to the ignition position (II) with all doors closed
4. The last door is closed and the vehicle is externally locked on receipt of an unlock request from the ignition key or a manual unlock using the ignition key in the drivers door lock when the time-out timer is still active
5. The last door is closed when the ignition switch is in the ignition position II.

Hunting Mode

The interior lamps can be permanently switched off, preventing automatic operation when a door is opened or the vehicle is unlocked using the remote handset. This is achieved by pressing and holding the central switch of the main interior lamp for 5 seconds. All of the interior lamps, with the exception of the approach lamps, will remain off until the procedure is repeated.

MAIN INTERIOR LAMP ASSEMBLY

Main Interior Lamp

Scheme 2

The main interior lamp assembly is common to all models. The lamp assembly has three switches; one for the main interior lamp and two for the map reading lamps.

The main interior lamp is located in a housing which can also contain the sunroof switch and/or the voice activation microphones, depending on specification.

The main interior lamp operates as part of the automatic interior lighting system. The map reading lamps only operate manually.

Both the interior and map reading lamps use 5W capless bulbs.

The main interior lamp unit also contains an LED for the waterfall lighting. Waterfall lighting is part of the lighting control switch functionality which also controls the brightness of the switch and instrument cluster display illumination. Waterfall lighting provides very limited illumination for the center of the fascia and the center console, when the vehicle is being driven, without affecting the driver's night vision.

Main Interior Lamp

The main interior lamp operates independently of the ignition switch position and can be operated automatically by one of a number of inputs to the CJB or manually by pressing the central switch on the lamp assembly. The switch is a momentary switch which is connected directly to and completes a circuit to the CJB. This completed circuit is a signal for the CJB to activate or deactivate the main interior lamp. The lamp will remain on until the switch is pressed a second time.

The interior lamps can be permanently switched off as previously described in 'Hunting Mode'.

Map Reading Lamps

The main interior lamp assembly contains map reading lamps which are located adjacent to the main interior lamp. The lamps are operated by two momentary switches on the lamp unit, which are located on either side of the main interior lamp switch.

GLOVE COMPARTMENT LAMP

The glove compartment lamp is located inside the glove compartment and contains an integral switch. The switch is operated when the glove compartment lid is opened and closed, switching the lamp on and off.

The glove compartment lamp uses a 5W festoon bulb.

PUDDLE LAMPS

Each door is fitted with a puddle lamp which illuminates the ground below the door when the door is opened. The puddle lamps are located in the bottom of the door trim panel on each front and rear door.

The puddle lamps are part of the automatic interior lighting functionality. Each lamp uses a 5W capless bulb.

FOOTWELL LAMPS

Two footwell lamps are located under the instrument panel, one on each side, to illuminate the footwell area. The footwell lamps are controlled by the CJB and operate as part of the interior lighting functionality.

The footwell lamps use a 5W capless bulb.

LUGGAGE COMPARTMENT LAMP

A luggage compartment lamp is located in the right hand 'D' post trim. The luggage compartment lamp is controlled by the CJB and operates as part of the interior lighting functionality.

The luggage compartment lamp uses a 5W capless bulb.

VANITY MIRROR LAMPS

Four vanity mirror lamps are fitted, two in each vanity mirror. The lamps are illuminated when the mirror cover is raised. The vanity mirror lamps operate independently of the ignition switch position and separately to the interior lighting functionality, although they are subject to the battery saver feature of the CJB.

The vanity mirrors use low voltage, 1.2W festoon type bulbs.

EXTERIOR DOOR MIRROR APPROACH LAMPS (IF FITTED)

A door mirror approach lamp is located on the underside of each exterior door mirror. The approach lamps are controlled by the CJB and operate on receipt of an unlock request from the ignition key or a manual unlock using the ignition key in the drivers door lock.

The approach lamps remain illuminated for the same period as the interior lamps and are subject to the same interior lamp time-out as detailed earlier.

The approach lamps use 5W capless bulbs.

CONTROL DIAGRAM

Note. A = Hardwired

Scheme 3

OVERVIEW

For information on the description and operation of the system

REFER to: Interior Lighting .

INSPECTION AND VERIFICATION

1. Verify the customer concern.
2. Visually inspect for obvious electrical faults. Visual Inspection Chart Mechanical Electrical Main interior lamp condition and installation Map reading lamp(s) condition and installation Vanity mirror lamp(s) condition and installation Glove compartment lamp condition and installation Footwell lamp(s) condition and installation Ignition switch glow ring condition and installation Door mirror approach lamp(s) condition and installation Puddle lamp(s) condition and installation Luggage compartment lamp condition and installation Bulbs Fuses Battery junction box (BJB) - link 15E BJB - link 11E Central junction box (CJB) - Fuse 1P BJB CJB Battery saver relay Wiring harness Loose or corroded connector(s) Main interior lamp switch Map reading lamp switches Vanity mirror lamp switches Glove compartment lamp switch Waterfall lighting LED Tailgate lamp switch
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index. Make sure that all DTCs are cleared following rectification

SYMPTOM CHART

DTC INDEX

Note. Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

See also:
• Information And Message Center
• Air Bag And Safety Belt Pretensioner Supplemental Restraint System (SRS)
• Interior Lighting