Land Rover Range Rover Electrical Library Lm 2nd Edition Rover Manual

							DESCRIPTION AND OPERATION
4.76RANGE ROVER
Bi-Xenon System
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fuse 53, fusible link 3, and 
fusible link 4 on an R wire. All are located in the passenger compartment fuse box. Fusible 
link 3 (C0589) and fusible link 4 (C0590) provide constant battery feeds to the Light Check 
Module (LCM) (C0937 & C2039 respectively) on a pair of R wires. The LCM (C2039) is 
earthed on an N wire.
Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0099 on Td6 
vehicles, C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the 
auxiliary position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8 
vehicles) to fuse 9 of the passenger compartment fuse box (C0585) on a PB wire. Fuse 9 
(C0587) provides an auxiliary ignition feed to the LCM (C2040) on a PY wire.
When the ignition switch is turned to the ignition position, current flows across the switch 
(C0099 on Td6 vehicles, C0028 on V8 vehicles) to fuse 4 and fuse 32 of the passenger 
compartment fuse box (C0585) on a G wire. Fuse 4 (C0587) provides an ignition feed to the 
LCM (C2040) on a GS wire.
Fuse 32 of the passenger compartment fuse box (C0585) provides an ignition feed to LH bi-
xenon headlamp (C0009) on a GR wire. Fuse 32 (C0587) also provides an ignition feed to 
the RH bi-xenon headlamp (C0011) on a GR wire.
Light Check Module
The LCM (C2040) is located at the base of the RH A post, and monitors the condition of the 
fascia mounted rotary lighting switch (C0041) by providing a feed on an NB wire. The LCM 
can determine the position of the switch by sensing if a feed is returned on a Y (side lamps) 
or a B (headlamps) wire. The LCM also monitors the condition of the column mounted main/
dipped beam switch (C1832) via a U wire.
Side Lamps
If the LCM detects that side lamps have been selected, it provides a feed to the following:

To the RH side lamp (C0537) on an SU wire

To the LH side lamp (C0538) on an SG wire

To the RH tail lamp (C0125) on an SW wire

To the LH tail lamp (C0121) on an SP wire

The rear number plate lamp (C1495) on an SN and an SB wire

To the RH front side marker lamp (C0916) on an SU wire (NAS vehicles only)

To the RH rear side marker lamp (C0918) on an SU wire (NAS vehicles only)

To the LH front side marker lamp (C0917) on an SG wire (NAS vehicles only)

To the LH rear side marker lamp (C0919) on an SG wire (NAS vehicles only).
All are earthed on N wires. 
						

							DESCRIPTION AND OPERATION
RANGE ROVER 4.77
Headlamp Dipped Beam
In addition to the lamps outlined in the side lamps section, the LCM will provide feeds to the 
following lamps if it detects that headlamp dipped beam has been selected:

To the RH headlamp dipped beam bulb (C0011) on a YU wire

To the LH headlamp dipped beam bulb (C0009) on a WG wire.
Both are earthed on N wires.
Headlamp Main Beam
In addition to the lamps outlined in the side lamps and headlamp dipped beam sections, the 
LCM will provide feeds to the following lamps if it detects that headlamp main beam has 
been selected:

To the RH headlamp bi-xenon unit (C0011) on a WU and a WB wire

To the LH headlamp bi-xenon unit (C0009) on a YG and a WB wire.
Both are earthed on N wires.
Diagnostic Socket
The bi-xenon headlamp system can be interrogated using TestBook or T4 via the diagnostic 
socket. The diagnostic socket (C0040) is connected to the RH (C0011) and LH (C0009) bi-
xenon units via a pair of WP wires. 
						

							DESCRIPTION AND OPERATION
4.78RANGE ROVER
AUTOMATIC HEADLAMP LEVELLING
DESCRIPTION
General
Automatic headlamp levelling is only fitted to vehicles with bi-xenon headlamps. The system 
adjusts the vertical positioning of the headlamps to provide optimum headlamp beam 
position for maximum driving visibility and preventing glare to oncoming drivers.
WARNING: The bi-xenon headlamp system generates up to 28000 volts and contact 
with this voltage could lead to fatality. Ensure the headlamps are switched off before 
working on the system.
The system is controlled by the headlamp levelling ECU, which is located at the base of the 
LH A post. The ECU receives information from the front and rear height sensors and the 
ABS ECU to maintain the headlamps in the optimum vertical position.
For more information on automatic headlamp levelling, refer to the  Lighting  section of the 
System Description and Operation Workshop Manual.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 4 and fuse 53 of 
the passenger compartment fuse box (C0632) on an R wire. Fusible link 4 (C0590) provides 
a constant battery feed to the Light Check Module (LCM) (C2039) on an R wire. 
Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0099 on Td6 
vehicles, C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the 
auxiliary position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8 
vehicles) to fuse 9 of the passenger compartment fuse box (C0585) on a PB wire. Fuse 9 
(C0587) provides an auxiliary ignition feed to the LCM (C2040) on a PY wire.
Light Check Module
When the engine is running, the Light Check Module (LCM) (C2040) provides a feed to the 
headlamp levelling ECU (C1543) on a YR wire to initiate the automatic headlamp levelling 
function.
The LCM (C2040) also monitors the condition of the brake pedal switch (C0075) by 
providing a feed on a UR wire. This feed allows the headlamp levelling ECU to register when 
the vehicle is about to decelerate and adjust the vertical position of the headlamps 
accordingly.
For more information on the brake pedal switch, refer to the  Brake and Reverse Lamps  
section of this manual.
 
+  BRAKE AND REVERSE LAMPS.  
						

							DESCRIPTION AND OPERATION
RANGE ROVER 4.79
ABS ECU
The ABS ECU (C0506) provides a vehicle speed signal to the headlamp levelling ECU 
(C1543) on a YW wire. This allows the headlamp levelling ECU to monitor the acceleration 
of the vehicle and adjust the vertical position of the headlamps accordingly.
RH Front Height Sensor
The headlamp levelling ECU (C1543) provides a 5V reference feed to the RH front height 
sensor (C1697) on a WB wire, and provides an earth path on a WN wire. The height sensor 
(C1697) returns a signal feed back to the headlamp levelling ECU (C1543) on a WS wire. 
By measuring this signal feed the headlamp ECU can determine the height of the front of 
the vehicle, compare this to the signal supplied by the RH rear height sensor and adjust the 
vertical position of the headlamps accordingly.
RH Rear Height Sensor
The headlamp levelling ECU (C1543) provides a 5V reference feed to the RH rear height 
sensor (C1698) on an SB wire, and provides an earth path on an SN wire. The height sensor 
(C1698) returns a signal feed back to the headlamp levelling ECU (C1543) on an SW wire. 
By measuring this signal feed the headlamp ECU can determine the height of the rear of the 
vehicle, compare this to the signal supplied by the RH front height sensor and adjust the 
vertical position of the headlamps accordingly. 
						

							DESCRIPTION AND OPERATION
4.80RANGE ROVER
FOG LAMPS
DESCRIPTION
General
Operation of both the front and rear fog lamps is controlled by the Light Check Module 
(LCM). The front fog lamps are only active when the ignition switch is in the ignition position 
and the fascia mounted rotary lighting switch is in the side or headlamp position. 
When the lighting switch is in the side lamp position, the rear fog lamps will only operate if 
the front fog lamps are operational. If the lighting switch is in the headlamp position, the rear 
fog lamps can be switched on separately from the front fog lamps.
For more information on fog lamp operation, refer to the  Lighting  section of the System 
Description and Operation Workshop Manual.
OPERATION
Front Fog Lamps
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 3 and fuse 53 of 
the passenger compartment fuse box (C0632) on an R wire. Fusible link 3 (C0589) provides 
a constant battery feed to the LCM (C0937) on an R wire.
Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0099 on Td6 
vehicles, C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the 
auxiliary position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8 
vehicles) to fuse 9 of the passenger compartment fuse box (C0585) on a PB wire. Fuse 9 
(C0587) provides an auxiliary ignition feed to the LCM (C2040) on a PY wire. The LCM 
(C2039) is earthed on an N wire.
Light Check Module
The Light Check Module (LCM) (C2040) provides a feed to the lighting switch (C0041) on a 
YW wire. When front fog lamps are selected, the switch contacts close momentarily. Current 
flows across the switch to the LCM on an NB wire. Sensing this, the LCM powers the front 
fog lamps.
The LCM (C0937) provides a feed to the RH front fog lamp (C0513) on a YN wire. The lamp 
is earthed on an N wire. The LCM (C2039) also provides a feed to the LH front fog lamp 
(C0514) on a YR wire. The lamp is earthed on an N wire. 
						

							DESCRIPTION AND OPERATION
RANGE ROVER 4.81
Rear Fog Lamps
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 3 and fuse 53 of 
the passenger compartment fuse box (C0632) on an R wire. Fusible link 3 (C0589) provides 
a constant battery feed to the LCM (C0937) on an R wire.
Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0099 on Td6 
vehicles, C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the 
auxiliary position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8 
vehicles) to fuse 9 of the passenger compartment fuse box (C0585) on a PB wire. Fuse 9 
(C0587) provides an auxiliary ignition feed to the LCM (C2040) on a PY wire. The LCM 
(C2039) is earthed on an N wire.
Light Check Module
The Light Check Module (LCM) (C2040) provides a feed to the lighting switch (C0041) on a 
YB wire. When rear fog lamps are selected, the switch contacts close momentarily. Current 
flows across the switch to the LCM on an NB wire. Sensing this, the LCM powers the rear 
fog lamps.
The LCM (C0937) provides a feed to the RH rear fog lamp (C0125) on a YB wire. The lamp 
is earthed on an N wire. The LCM (C2039) also provides a feed to the LH rear fog lamp 
(C0121) on a YB wire. The lamp is earthed on an N wire. 
						

							DESCRIPTION AND OPERATION
4.82RANGE ROVER
DIRECTION INDICATOR/HAZARD WARNING LAMPS
DESCRIPTION
General
Operation of the direction indicator lamps is controlled by the column mounted switch via the 
Light Check Module (LCM). The direction indicator lamps operate when the ignition switch 
is in either the auxiliary or ignition positions.
The front direction indicator lamps are located within the side lamp assemblies, outboard of 
the headlamps. The rear direction indicator lamps are located within the tail lamp 
assemblies. The rear direction indicators are mounted behind the brake lamp LED 
assemblies. When the direction indicators are selected, a lens within the tail lamp directs the 
light around the outer diameter of the brake lamp LED assembly. 
The hazard warning switch is mounted on the centre of the fascia. When pressed, both sets 
of direction indicator lamps operate simultaneously.
For more details on direction indicator and hazard warning lamp operation, refer to the  
Lighting  section of the System Description and Operation Workshop manual.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 3, fusible link 4, 
and fuse 53 of the passenger compartment fuse box (C0632) on an R wire. Fusible link 3 
(C0589) and fusible link 4 (C0590) provide constant battery feeds to the Light Check Module 
(LCM) (C0937 & C2039 respectively) on a pair of R wires.
Fuse 53 of the passenger compartment fuse box (C0583) provides a constant battery feed 
to the ignition switch (C0099 on Td6 vehicles, C0028 on V8 vehicles) on an R wire. When 
the ignition switch is turned to the auxiliary position, current flows across the switch (C0099 
on Td6 vehicles, C0028 on V8 vehicles) to fuse 9 of the passenger compartment fuse box 
(C0585) on a PB wire. Fuse 9 (C0587) provides an auxiliary ignition feed to the Light Check 
Module (LCM) (C2040) on a PY wire.
When the ignition switch is turned to the ignition position, current flows across the switch 
(C0099 on Td6 vehicles, C0028 on V8 vehicles) to fuse 4 of the passenger compartment 
fuse box (C0585) on a G wire. Fuse 4 (C0587) provides an ignition feed to the LCM (C2040) 
on a GS wire.
The LCM (C2039) is earthed on an N wire. 
						

							DESCRIPTION AND OPERATION
RANGE ROVER 4.83
RH Turn
The LCM (C2040) monitors the condition of the column mounted direction indicator switch 
(C1832) by providing a feed on an NB wire. If a RH turn is selected, the LCM provides the 
following outputs:

From the LCM (C0937) to the RH front direction indicator lamp (C0002) on a UN wire.

From the LCM (C2039) to the RH rear direction indicator lamp (C0125) on a UN wire.

From the LCM (C0937) to the RH rear side repeater lamp (C0012) on a UY wire.
All are earthed on N wires.
LH Turn
The LCM (C2040) monitors the condition of the column mounted direction indicator switch 
(C1832) by providing a feed on an NB wire. If a LH turn is selected, the LCM provides the 
following outputs:

From the LCM (C2039) to the LH front direction indicator lamp (C0001) on a UG wire.

From the LCM (C0937) to the LH rear direction indicator lamp (C0121) on a UG wire.

From the LCM (C2039) to the LH rear side repeater lamp (C0013) on a UY wire.
All are earthed on N wires.
Hazard Warning Lamps
If an impact severe enough to trigger the airbags is detected, the SRS DCU sends a K bus 
message to the instrument pack requesting the hazard warning lamps be initiated. This is 
relayed to the LCM (C2040) via the I bus on a WSY wire. 
						

							DESCRIPTION AND OPERATION
4.84RANGE ROVER
INTERIOR LAMPS
DESCRIPTION
General
Operation of the interior lamps is controlled by the Body Control Unit (BCU) which is located 
beneath the front passenger seat.
The interior lamps have two modes of operation; automatic or manual. In the automatic 
mode the interior lamp functionality is controlled by the BCU on receipt of various input 
signals. In manual mode, the lamps can be switched on and off using the non-latching switch 
adjacent to the front interior lamp, or can be disabled completely using the same switch.
For more information on interior lamp functionality, refer to the  Lighting  section of the 
System Description and Operation Workshop manual.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fuse 17, fuse 27 and fuse 53 
of the passenger compartment fuse box (C0632) on an R wire. Fuse 17 is connected to the 
door lamp module, which is also located in the passenger compartment fuse box.
Fuse 27 (C0582) provides a constant battery feed to the Body Control Unit (BCU) (C0662) 
on an RP wire.
Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0099 on Td6 
vehicles, C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the 
auxiliary position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8 
vehicles) to fuse 42 of the passenger compartment fuse box (C0585) on a PB wire. Fuse 42 
(C0586) provides an auxiliary ignition feed to the RH (C0736) and LH (C0737) vanity mirrors 
on a pair of PS wires.
When the ignition switch is turned to the ignition position, current flows across the switch 
(C0099 on Td6 vehicles, C0028 on V8 vehicles) to fuse 4 of the passenger compartment 
fuse box (C0585) on a G wire. Fuse 4 provides an ignition feed to the door lamp module, 
which is also located in the passenger compartment fuse box. 
						

							DESCRIPTION AND OPERATION
RANGE ROVER 4.85
Body Control Unit (BCU)
The BCU (C0662) monitors the condition of all four doors and provides feeds to the following 
lamps via the passenger compartment fuse box on RU wires if any are opened:

The RH front footwell lamp (C0076)

The LH front footwell lamp (C0077)

The RH front sill lamp (C1794)

The LH front sill lamp (C1795)

The LH rear puddle lamp (C2212)

The RH front puddle lamp (C2211)

The RH rear puddle lamp (C2212)

The LH front puddle lamp (C2210)

The front interior lamp (C0355)

The rear interior lamp (C0357).
All are earthed on N wires.
NOTE: The LH rear and RH rear puddle lamps have the same connector number as they 
utilise the same harness.
Approach Lamps
When the BCU receives a valid unlocking signal from the remote handset, it will illuminate 
the approach lamps via the door lamp module. The door lamp module (C0587) is located in 
the passenger compartment fuse box and provides a feed to the LH (C2291) and RH 
(C2291) approach lamps on a pair of RG then K wires. Both lamps are earthed on Y then N 
wires.
NOTE: The LH and RH approach lamps have the same connector number as they utilise the 
same harness.
Luggage Compartment Lamps
The BCU (C0662) provides a feed to the LH (C0120) and RH (C0119) upper tail door lamps, 
and the luggage compartment lamp (C2047) on RY wires. The earth path for the lamps is 
controlled by the tail door tail door motor (C0383).
Map Reading Lamps
The front and rear interior lamps both contain 2 map reading lamps. The BCU (C0662) 
provides a feed to the front (C0355) and rear (C0357) map reading lamps on a pair of RY 
wires. When any of the map reading lamp switches are pressed, the switch contacts close 
allowing current to flow to earth on an N wire to illuminate the lamp.