Land Rover Freelander 2002my Electrical Library 3rd Edition Rover Manual

							EARTH POINTS AND HEADERS
3.2FREELANDER 02MY
02 MY 
						

							DESCRIPTION AND OPERATION
FREELANDER 02MY 4.1
DE SCRIP TION AND OPERATIONANTI-THEFT ALARM AND CENTRAL DOOR LOCKING (CDL)
DESCRIPTION
General
The anti-theft alarm system is controlled by the Central Control Unit (CCU), which is 
mounted on the rear of the passenger compartment fuse box. The alarm can be armed and 
disarmed using the vehicle key or remote handset. The two main features of the alarm 
system are:

Perimetric protection.

Volumetric protection.
Perimetric Protection
Perimetric protection secures against intrusion through the bonnet, doors, tail door or roof. 
The CCU monitors the state of the hinged panels after the alarm system has been armed. If 
a panel is opened after the alarm has been armed, the alarm will be triggered.
Switches are incorporated into the door latch assemblies, the bonnet, and the tail door. 
Three door vehicles also have a roof on switch, to inform the CCU if the hard back has been 
removed, or the soft back is opened.
Perimetric protection is initiated after a valid alarm request is received. If any panel is open 
when perimetric protection is activated (other than the roof), the alarm will enter a partially 
armed state.
Volumetric Protection
Volumetric protection provides protection for the vehicle interior. A volumetric sensor 
monitors the vehicle interior space and activates the alarm if unauthorised movement is 
detected. The volumetric sensor is located in a central position, behind the headlining.
A fifteen second delay is initiated after the alarm has been armed before signals from the 
volumetric sensor are interpreted as an intrusion. This precaution is included in the CCU 
software to avoid accidental or nuisance triggering of the alarm.
For a detailed description of the anti-theft alarm system, refer to the  Security  section of the 
System Description and Operation Workshop manual. 
						

							DESCRIPTION AND OPERATION
4.2FREELANDER 02MY
OPERATION
General
Feed from the positive battery terminal (C0192) is supplied to the horn relay, fuse 6, fuse 7, 
fuse 10, and fusible link 4 (C0632) on an R wire. All are located in the engine compartment 
fuse box. Fuse 10 (C0575) provides a constant battery feed to the inertia switch (C0123) on 
a G wire. Fuse 7 (C0576) provides a constant battery feed to the hazard warning relay 
located in the passenger compartment fuse box (C0581) on an NO wire. 
Fusible link 4 (C0574) provides a constant battery feed to the CCU (C0593) and fuse 14 of 
the passenger compartment fuse box (C0581) on an NW wire. Fuse 14 (C0589) provides a 
feed to the alarm LED located in the instrument pack (C0230) and the transponder coil 
mounted around the ignition barrel (C0049) on P wires. Fuse 14 (C0583) also provides a 
feed to the diagnostic socket (C0040) and the roof on switch (3 door vehicles only) (C0497) 
on P wires.
Door Switches
In order for the perimetric alarm system to operate, the CCU monitors the condition of the 
door switches (including the tail door switch). The door switches are open circuit when the 
doors are closed. When the doors are opened, the switches close and an earth path is 
created. The CCU (C0428) is connected to the door switches as follows:

To the driver door switch (C0441) on a PS then PW wire.

To the passenger door switch (C0441) on a PW wire.

To the LH rear door switch (C0442) on a PW wire.

To the RH rear door switch (C0442) on a PW wire.

To the tail door switch (C0616) on a BO wire.
NOTE: Both front and both rear door switches have the same connector number as they 
utilise the same harness.
The CCU treats the passenger door, and both rear doors as a single item. All door switches 
are earthed on B wires.
Bonnet Switch
In addition to the door switches, the CCU also monitors the condition of the bonnet switch. 
The bonnet switch is a normally open switch. When the bonnet is opened, the switch closes 
and an earth path is created.
The CCU (C0428) provides a feed to the bonnet switch (C0007) on an RP wire. The switch 
(C0007) is earthed on a B wire. By monitoring the state of the bonnet switch, the CCU can 
determine if the bonnet has been opened illegally and sound the alarm if necessary. 
						

							DESCRIPTION AND OPERATION
FREELANDER 02MY 4.3
Roof On Switch (3 Door Vehicles Only)
The roof on switch (C0497) is located on the RH D post, and is provided a constant battery 
feed by fuse 14 of the passenger compartment fuse box (C0583) on a P wire. The roof on 
switch is closed when the hard back is fitted, or the soft back is in the fitted position. In this 
instance, current flows across the switch (C0497) to the CCU (C0428) on a PY wire.
If the hard back is removed (or the soft back is folded down) the roof on switch becomes 
open circuit, and the feed to the CCU is removed. By monitoring the state of the roof on 
switch, the CCU can determine if the roof has been opened illegally and sound the alarm if 
necessary.
Anti-theft Alarm LED
Fuse 14 of the passenger compartment fuse box (C0589) provides a constant battery feed 
to the anti-theft alarm LED mounted in the instrument pack (C0230) on a P wire. The earth 
path for the LED (C0235) is controlled by the CCU (C0592) on a UK wire. By switching the 
earth path on and off, the CCU can control the flashing sequence of the LED.
Inertia Switch
Fuse 10 of the engine compartment fuse box (C0575) provides a constant battery feed to 
the inertia switch (C0123) on a G wire. The inertia switch is a normally closed switch. On 
K1.8 and KV6 vehicles, the inertia switch (C0123) is connected to the CCU (C0428) via the 
engine compartment fuse box by a GU then UG wire. On Td5 vehicles the inertia switch 
(C0123) is connected to the CCU (C0428) by a GU wire. 
When the inertia switch is tripped the switch opens, cutting the voltage supply to the CCU. 
Sensing this, the CCU unlocks all doors and cuts the electrical supply to the fuel pump.
NOTE: The CCU will only unlock all doors if the ignition is switched on, and the anti-theft 
alarm isnt armed.
For more information on the fuel pump, refer to the relevant  Charging and Starting  section 
of this manual.
 
+  CHARGING AND STARTING – Td4. 
 
+  CHARGING AND STARTING – K SERIES. 
 
+  CHARGING AND STARTING – KV6. 
Volumetric Sensor
The CCU (C0429) provides a feed to the volumetric sensor (C0358 on 3 door vehicles, 
C1896 on 5 door vehicles) on a WB wire. When the alarm is armed, the volumetric sensor 
(C0358 on 3 door vehicles, C1896 on 5 door vehicles) returns a signal feed back to the CCU 
(C0428) on an NB wire. If the sensor detects movement within the vehicle, it withdraws the 
signal feed to the CCU. Sensing this, the CCU will sound the alarm. 
						

							DESCRIPTION AND OPERATION
4.4FREELANDER 02MY
The CCU (C0429) also provides a gain setting signal to the volumetric sensor (C0358 on 3 
door vehicles, C1896 on 5 door vehicles) on an SW wire. This enables the volumetric sensor 
to determine if it is looking at the interior of a 3 door vehicle or a 5 door vehicle and adjust 
its sensitivity accordingly.
The volumetric sensor (C0358 on 3 door vehicles, C1896 on 5 door vehicles) is earthed on 
a B wire.
Radio Frequency (RF) Receiver
The CCU (C0429) provides a feed to the RF receiver (C0359) on a Y wire. The RF receiver 
(C0359) provides a 12 V feed back to the CCU (C0428) on an S wire. When an RF signal is 
received from the remote handset, the receiver switches the feed back to the CCU between 
12 V and 0 V at high frequency.
The RF receiver (C0359) is earthed on a B wire.
Master Lock Switch
The master lock switch is a non-latching rocker switch mounted on the centre console, below 
the radio. When the bottom (lock) half of the switch is pressed, current is able to flow from 
the CCU (C0428) to the master lock switch (C0328) on a BN wire. Current flows across the 
closed switch contacts to earth on a B wire. The CCU will now lock all the doors.
NOTE: The alarm will not be armed when using the master lock switch.
When the top (unlock) half of the switch is pressed, current is able to flow from the CCU 
(C0428) to the master lock switch (C0328) on a BK wire. Current flows across the closed 
switch contacts to earth on a B wire. The CCU will now unlock all the doors.
Door Lock Motors
When the CCU receives a request to lock or unlock the doors, it powers the door lock motors 
as follows:
Driver Door
To lock the driver door, the CCU (C0430) provides a feed to the driver door lock motor 
(C0441) on a K wire. The motor (C0441) is provided an earth path via the CCU (C0430) on 
an O wire. This enables the motor to drive the latch to the lock position.
To unlock the driver door, the CCU (C0430) provides a feed to the driver door lock motor 
(C0441) on an O wire. The motor (C0441) is provided an earth path via the CCU (C0430) 
on a K wire. This enables the motor to drive the latch to the unlock position. 
						

							DESCRIPTION AND OPERATION
FREELANDER 02MY 4.5
Passenger Door
To lock the passenger door, the CCU (C0430) provides a feed to the passenger door lock 
motor (C0441) on a K wire. The motor (C0441) is provided an earth path via the CCU 
(C0430) on an O wire. This enables the motor to drive the latch to the lock position.
To unlock the passenger door, the CCU (C0430) provides a feed to the passenger door lock 
motor (C0441) on an O wire. The motor (C0441) is provided an earth path via the CCU 
(C0430) on a K wire. This enables the motor to drive the latch to the unlock position.
NOTE: The driver and passenger door lock motors have the same connector numbers as 
they utilise the same harness.
LH Rear Door
To lock the LH rear door, the CCU (C0430) provides a feed to the LH rear door lock motor 
(C0442) on a K wire. The motor (C0442) is provided an earth path via the CCU (C0430) on 
an O wire. This enables the motor to drive the latch to the lock position.
To unlock the LH rear door, the CCU (C0430) provides a feed to the LH rear door lock motor 
(C0442) on an O wire. The motor (C0442) is provided an earth path via the CCU (C0430) 
on a K wire. This enables the motor to drive the latch to the unlock position.
RH Rear Door
To lock the RH rear door, the CCU (C0430) provides a feed to the RH rear door lock motor 
(C0442) on a K wire. The motor (C0442) is provided an earth path via the CCU (C0430) on 
an O wire. This enables the motor to drive the latch to the lock position.
To unlock the RH rear door, the CCU (C0430) provides a feed to the RH rear door lock motor 
(C0442) on an O wire. The motor (C0442) is provided an earth path via the CCU (C0430) 
on a K wire. This enables the motor to drive the latch to the unlock position.
NOTE: The LH rear and RH rear door lock motors have the same connector numbers as 
they utilise the same harness.
Tail Door
Operation of the tail door latch mechanism is only possible when the vehicle is stationary or 
travelling at speeds lower than 3 mph (5 km/h). To allow the tail door latch to operate, the 
CCU (C0430) provides a single voltage pulse to the tail door motor (C0617) on a PU wire. 
The motor (C0617) is earthed on a B wire. 
The CCU receives a road speed signal from the ABS ECU. If road speed rises above 3 mph 
(5 km/h), the CCU will not provide a voltage pulse to the tail door motor, inhibiting operation 
of the tail door latch mechanism. 
						

							DESCRIPTION AND OPERATION
4.6FREELANDER 02MY
Superlocking
Superlocking inhibits the use of the interior door handles in addition to driving the door lock 
motors to the lock position. When the CCU receives a request to superlock the doors, it 
supplies the following outputs in addition to those detailed above in the  Door Lock Motors  
description.
NOTE: The vehicle will not start if the vehicle is superlocked. For more information, refer to 
the Engine Immobilisation section of this manual.
 
+  ENGINE IMMOBILISATION. 
Driver Door
To superlock the driver door, the CCU (C0430) provides a feed to the driver door superlock 
motor (C0441) on an NK wire. The superlock motor (C0441) is provided an earth path via 
the CCU (C0430) on an O wire. This powers the superlock motor to the lock position, 
inhibiting the interior door handle. 
To unlock the driver door from the superlock condition, the CCU (C0430) provides a feed to 
the driver door lock motor and the superlock motor (C0441) on an O wire. The driver door 
lock motor and the superlock motor (C0441) are provided an earth path via the CCU (C0430) 
on a K wire. This powers both motors to the unlock position.
Passenger Door
To superlock the passenger door, the CCU (C0430) provides a feed to the passenger door 
superlock motor (C0441) on an NK wire. The superlock motor (C0441) is provided an earth 
path via the CCU (C0430) on an O wire. This powers the superlock motor to the lock 
position, inhibiting the interior door handle.
To unlock the passenger door from the superlock condition, the CCU (C0430) provides a 
feed to the passenger door lock motor and the superlock motor (C0441) on an O wire. The 
passenger door lock motor and the superlock motor (C0441) are provided an earth path via 
the CCU (C0430) on a K wire. This powers both motors to the unlock position.
LH Rear Door
To superlock the LH rear door, the CCU (C0430) provides a feed to the LH rear door 
superlock motor (C0442) on an NK wire. The superlock motor (C0442) is provided an earth 
path via the CCU (C0430) on an O wire. This powers the superlock motor to the lock 
position, inhibiting the interior door handle.
To unlock the LH rear door from the superlock condition, the CCU (C0430) provides a feed 
to the LH rear door lock motor and the superlock motor (C0442) on an O wire. The LH rear 
door lock motor and the superlock motor (C0442) are provided an earth path via the CCU 
(C0430) on a K wire. This powers both motors to the unlock position. 
						

							DESCRIPTION AND OPERATION
FREELANDER 02MY 4.7
RH Rear Door
To superlock the RH rear door, the CCU (C0430) provides a feed to the RH rear door 
superlock motor (C0442) on an NK wire. The superlock motor (C0442) is provided an earth 
path via the CCU (C0430) on an O wire. This powers the superlock motor to the lock 
position, inhibiting the interior door handle.
To unlock the RH rear door from the superlock condition, the CCU (C0430) provides a feed 
to the RH rear door lock motor and the superlock motor (C0442) on an O wire. The RH rear 
door lock motor and the superlock motor (C0442) are provided an earth path via the CCU 
(C0430) on a K wire. This powers both motors to the unlock position.
Horns
If the anti-theft alarm is triggered, the CCU (C0430) provides an earth path for the horn relay 
coil (C0576) on a PY wire. The energised horn relay (C0570 & C0576) provides a feed to 
the LH (C0003) and RH (C0004) horns on PB wires. The horns are earthed on B wires.
By switching the earth path for the relay coil on and off, the CCU can control the operation 
of the horns.
Direction Indicator/Hazard Warning Lamps
If the anti-theft alarm is triggered, the CCU (C0593) provides an earth path for the hazard 
warning relay coil. The energised hazard warning relay provides a feed to the following:

The LH rear direction indicator lamp (C0121) on a GR wire

The RH rear direction indicator lamp (C0125) on a GW wire

The LH front direction indicator lamp (C0009) on a GR wire

The RH front direction indicator lamp (C0011) on a GW wire

The trailer pick-up (C0499) on a GR and GW wire.
All are earthed on B wires, except the trailer pick-up which is earthed on a W then B wire.
By switching the earth path for the relay coil on and off, the CCU can control operation of the 
direction indicator lamps. For more information, refer to the Direction Indicator/Hazard 
Warning Lamps section of this manual.
 
+  DIRECTION INDICATOR/HAZARD WARNING LAMPS.  
						

							DESCRIPTION AND OPERATION
4.8FREELANDER 02MY
ENGINE IMMOBILISATION
DESCRIPTION
General
The function of the engine immobilisation system is to prevent unauthorised starting of the 
vehicle. The system is controlled by the immobilisation ECU, which is located behind the 
centre of the fascia. Re-mobilisation is achieved via a transponder in the vehicle key, which 
is read by a transponder coil when the ignition switch is turned to the auxiliary position. The 
transponder coil is mounted around the ignition barrel.
For a detailed description of the engine immobilisation system, refer to the  Security  section 
of the System Description and Operation Workshop manual.
OPERATION
General
Feed from the positive battery terminal (C0192) is supplied to fusible link 1, fusible link 3, 
and fusible link 4 of the engine compartment fuse box (C0632) on an R wire. Fusible link 4 
(C0574) is connected to fuse 32 of the passenger compartment fuse box (C0587) by an NW 
wire. Fuse 32 (C0584) provides a constant battery feed to the immobilisation ECU (C0059) 
on a PN wire.
Fusible link 3 (C0571) is connected to the ignition switch (C0028) by an N wire. When the 
ignition switch is turned to the auxiliary position, current flows across the switch (C0028) to 
fuse 11 of the passenger compartment fuse box (C0588) on a PS wire. Fuse 11 (C0580) 
provides an auxiliary ignition feed to the Central Control Unit (CCU) (C0430) on an LGW 
wire.
When the ignition switch is turned to the crank position, current flows across the switch 
(C0028) to fuse 5 of the passenger compartment fuse box (C0588) on a WR wire. Fuse 5 
(C0581) provides a feed to the immobilisation ECU (C0059) on a WR wire. The 
immobilisation ECU (C0059) is earthed on a B wire.
Immobilisation ECU Inputs/Outputs
The immobilisation ECU receives inputs and outputs from a number of different components 
to ensure the right criteria are met before it will allow the engine to be started. 
						

							DESCRIPTION AND OPERATION
FREELANDER 02MY 4.9
Transponder Coil
The transponder coil (C0049) mounted around the ignition barrel, and is connected to the 
engine immobilisation ECU (C0059) by KB and KG wires. Both connections between the 
immobilisation ECU and the transponder coil switch between both inputs and outputs. The 
transponder coil reads the vehicle identification information contained within the key 
transponder and relays it to the immobilisation ECU. The immobilisation ECU (C0059) then 
compares this information with the vehicle identification information received from the 
Central Control Unit (CCU) (C0429) on a G wire.
Central Control Unit (CCU)
The CCU (C0429) outputs a locking status signal to the immobilisation ECU (C0059) on a 
KN wire. If the vehicle has been superlocked or the anti-theft alarm system is armed, the 
immobilisation ECU issues a request for the CCU to remove both before it will allow the 
engine to be cranked. 
NOTE: When the CCU receives a remove superlock signal from the immobilisation ECU, it 
will unlock the driver door. Superlocking will be removed from the remaining doors if single 
point entry is selected.
For more information on superlocking and the anti-theft alarm system, refer to the  Anti-theft 
Alarm and Central Door Locking (CDL)  section of this manual.
 
+  ANTI-THEFT ALARM AND CENTRAL DOOR LOCKING (CDL). 
The CCU also outputs an ignition status signal, informing the immobilisation ECU when the 
ignition switch has been turned to the ignition position. The CCU (C0428) transmits this 
signal to the immobilisation ECU (C0059) on an ON wire.
Gearbox Solenoid (Automatic Vehicles Only)
When the gear selector lever is in the Park (P) or Neutral (N) position, the gearbox solenoid 
(C0244) provides a feed to the immobilisation ECU (C0059) on a W wire. If the selector lever 
is moved to any other position, the feed is removed and the immobilisation ECU will not allow 
the engine to be cranked.
Engine Control Module (ECM)
If the correct re-mobilisation code is received from the remote handset, the immobilisation 
ECU (C0059) transmits a rolling code to the ECM (C0331 on Td4 vehicles, C0913 on K 
Series vehicles, C0371 on KV6 vehicles) on a YR wire. The ECM (C0603 on Td4 vehicles, 
C0913 on K Series vehicles, C0371 on KV6 vehicles) will now energise the main relay by 
providing an earth path for the relay coil (C0576) on a WK wire.