Land Rover Freelander 2003my Electrical Library Rover Manual

							DESCRIPTION AND OPERATION
4.136FREELANDER 03MY
AUDIO SYSTEM – MID LINE
DESCRIPTION
General
The mid line audio system features a centre console mounted radio and a front loading 
single CD player, which will operate when the ignition switch is in the auxiliary position. 
Some vehicles are also fitted with a power amplifier and sub-woofer. For more information 
on audio system features and functionality, refer to the  In-Car Entertainment  handbook.
NOTE: The supporting circuit diagram shows the mid-range audio system fitted with optional 
Harmon Kardon speakers. A system fitted with standard speakers will not have a power 
amplifier or rear high range speakers fitted. The connector numbers applied to the high 
range speakers differ between the two speaker systems. For more information, refer to the 
Speakers – Standard and Speakers – Harmon Kardon sections.
OPERATION
General
Feed from the positive battery terminal (C0192) is supplied to fusible link 1 and fusible link 
4 of the engine compartment fuse box (C0632) on an R wire. Fusible link 4 (C0574) is 
connected to fuse 9 of the passenger compartment fuse box (C0587) by an NW wire. Fuse 
9 (C0585) provides a constant battery feed to the head unit (C0921) on a P wire (P then PK 
if fitted with a power amplifier) and the power amplifier (C0491) on a P then PK wire.
Fusible link 1 is connected in series with fusible link 2, which is also located in the engine 
compartment fuse box. Fusible link 2 (C0571) is connected to the ignition switch (C0028) by 
an NR 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 head unit (C0921) on an LGW 
wire.
The head unit (C0921) and the power amplifier (C0491) are both earthed on B wires. 
						

							DESCRIPTION AND OPERATION
FREELANDER 03MY 4.137
Speakers – Standard
The head unit (C0092) is connected to the speakers as follows:
NOTE: The LH and RH speakers share the same connector numbers as they utilise the 
same door harness.
zA positive signal is provided by the head unit to the RH front mid-range speaker 
(C0369) on an OK wire. The RH front mid-range speaker (C0369) is provided a 
negative signal by the head unit (C0092) on an OB wire.
zA positive signal is provided by the head unit to the RH front high range speaker 
(C0531) on an OK wire. The RH front high range speaker (C0530) is provided a 
negative signal by the head unit (C0092) on an OB wire.
zA positive signal is provided by the head unit to the LH front mid-range speaker 
(C0369) on a YK then OK wire. The LH front mid-range speaker (C0369) is provided a 
negative signal by the head unit (C0092) on a YB then OB wire.
zA positive signal is provided by the head unit to the LH front high range speaker 
(C0531) on a YK then OK wire. The LH front high range speaker (C0530) is provided 
a negative signal by the head unit (C0092) on an YB then OB wire.
zA positive signal is provided by the head unit to the RH rear mid-range speaker 
(C1577) on a UK wire. The RH rear mid-range speaker (C1577) is provided a negative 
signal by the head unit (C0092) on a UB wire.
zA positive signal is provided by the head unit to the LH rear mid-range speaker (C1577) 
on an SK then UK wire. The LH rear mid-range speaker (C1577) is provided a negative 
signal by the head unit (C0092) on an SB then UB wire.
NOTE: It is essential that all speakers are connected correctly. A speaker connected 
incorrectly will be out of phase with the remaining speakers, causing a deterioration of sound 
quality. 
						

							DESCRIPTION AND OPERATION
4.138FREELANDER 03MY
Speakers – Harmon Kardon
The head unit (C0092) is connected to the power amplifier (C0491) as follows:
zA positive signal is provided by the head unit to the power amplifier on a BG wire. This 
signal is used by the power amplifier for the RH rear speakers.
zA negative signal is provided by the head unit to the power amplifier on a BO wire. This 
signal is used by the power amplifier for the RH rear speakers.
zA positive signal is provided by the head unit to the power amplifier on a BP wire. This 
signal is used by the power amplifier for the RH front speakers.
zA negative signal is provided by the head unit to the power amplifier on a BU wire. This 
signal is used by the power amplifier for the RH front speakers.
zA positive signal is provided by the head unit to the power amplifier on a BW wire. This 
signal is used by the power amplifier for the LH front speakers.
zA negative signal is provided by the head unit to the power amplifier on a BS wire. This 
signal is used by the power amplifier for the LH front speakers.
zA positive signal is provided by the head unit to the power amplifier on a BN wire. This 
signal is used by the power amplifier for the LH rear speakers.
zA negative signal is provided by the head unit to the power amplifier on a BR wire. This 
signal is used by the power amplifier for the LH rear speakers. 
						

							DESCRIPTION AND OPERATION
FREELANDER 03MY 4.139
The power amplifier (C0491) receives inputs from the head unit (C0092) and relays them to 
the speakers as follows:
NOTE: The LH and RH speakers share the same connector numbers as they utilise the 
same door harness.
zA positive signal is provided by the power amplifier to the RH front mid-range speaker 
(C0369) on an OK wire. The RH front mid-range speaker (C0369) is provided a 
negative signal by the power amplifier (C0491) on an OB wire.
zA positive signal is provided by the power amplifier to the RH front high range speaker 
(C0680) on an OK wire. The RH front high range speaker (C0680) is provided a 
negative signal by the power amplifier (C0491) on an OB wire.
zA positive signal is provided by the power amplifier to the LH front mid-range speaker 
(C0369) on a YK then OK wire. The LH front mid-range speaker (C0369) is provided a 
negative signal by the power amplifier (C0491) on a YB then OB wire.
zA positive signal is provided by the power amplifier to the LH front high range speaker 
(C0680) on a YK then OK wire. The LH front high range speaker (C0680) is provided 
a negative signal by the power amplifier (C0491) on an YB then OB wire.
zA positive signal is provided by the power amplifier to the RH rear mid-range speaker 
(C1577) on a UK wire. The RH rear mid-range speaker (C1577) is provided a negative 
signal by the power amplifier (C0491) on a UB wire.
zA positive signal is provided by the power amplifier to the RH rear high range speaker 
(C0679) on a UK wire. The RH rear high range speaker (C0679) is provided a negative 
signal by the power amplifier (C0491) on a UB wire.
zA positive signal is provided by the power amplifier to the LH rear mid-range speaker 
(C1577) on an SK then UK wire. The LH rear mid-range speaker (C1577) is provided 
a negative signal by the power amplifier (C0491) on an SB then UB wire.
zA positive signal is provided by the power amplifier to the LH rear high range speaker 
(C0679) on an SK then UK wire. The LH rear high range speaker (C0679) is provided 
a negative signal by the power amplifier (C0491) on an SB then UB wire.
NOTE: It is essential that all speakers are connected correctly. A speaker connected 
incorrectly will be out of phase with the remaining speakers, causing a deterioration of sound 
quality.
Remote Audio Controls
The head unit (C0921) provides a feed via the rotary coupler (C0082) to the remote audio 
controls (C1254) on a BR wire. The remote audio controls contain a number of normally 
open switches and resistors. When either of the controls are moved, one of the switches 
closes and a voltage is returned to the head unit (C0921) on a BW wire. The value of the 
voltage returned to the head unit is dependent upon which way the controls are moved (and 
how many resistors are brought into the circuit). By measuring this returned voltage, the 
head unit determines which function has been requested. 
						

							DESCRIPTION AND OPERATION
4.140FREELANDER 03MY
NAVIGATION SYSTEM
DESCRIPTION
General
The satellite navigation head unit is located in the centre console, and also incorporates a 
radio and a front loading single CD player. Some vehicles are also fitted with a CD 
autochanger. 
The system operates when the ignition switch is turned to the auxiliary position. For more 
information on audio system features and functionality, refer to the   Audio and Navigation 
System  handbook. For detailed information on satellite navigation operation, refer to the  
Navigation System  section of the System Description and Operation Workshop manual.
NOTE: The supporting circuit diagram shows the Navigation system fitted with optional 
Harmon Kardon speakers. A system fitted with standard speakers will not have a power 
amplifier or rear high range speakers fitted. The connector numbers applied to the high 
range speakers differ between the two speaker systems. For more information, refer to the 
Speakers – Standard and Speakers – Harmon Kardon sections.
OPERATION
General
Feed from the positive battery terminal (C0192) is supplied to fusible link 1 and fusible link 
4 of the engine compartment fuse box (C0632) on an R wire. Fusible link 4 (C0574) is 
connected to fuse 9 of the passenger compartment fuse box (C0587) by an NW wire. Fuse 
9 (C0585) provides a constant battery feed to the following on P then PK wires:
zThe head unit (C0921)
zThe CD autochanger (C0941)
zThe power amplifier (C0491).
Fusible link 1 is connected in series with fusible link 2, which is also located in the engine 
compartment fuse box. Fusible link 2 (C0571) is connected to the ignition switch (C0028) by 
an NR 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 head unit (C0921) and the remote 
interface unit (C1897) on LGW wires.
The head unit (C0921), CD autochanger (C0941), power amplifier (C0491), and the remote 
interface unit (C1897) are all earthed on B wires. 
						

							DESCRIPTION AND OPERATION
FREELANDER 03MY 4.141
Speakers – Harmon Kardon
The head unit (C0092) is connected to the power amplifier (C0491) as follows:
zA positive signal is provided by the head unit to the power amplifier on a BG wire. This 
signal is used by the power amplifier for the RH rear speakers.
zA negative signal is provided by the head unit to the power amplifier on a BO wire. This 
signal is used by the power amplifier for the RH rear speakers.
zA positive signal is provided by the head unit to the power amplifier on a BP wire. This 
signal is used by the power amplifier for the RH front speakers.
zA negative signal is provided by the head unit to the power amplifier on a BU wire. This 
signal is used by the power amplifier for the RH front speakers.
zA positive signal is provided by the head unit to the power amplifier on a BW wire. This 
signal is used by the power amplifier for the LH front speakers.
zA negative signal is provided by the head unit to the power amplifier on a BS wire. This 
signal is used by the power amplifier for the LH front speakers.
zA positive signal is provided by the head unit to the power amplifier on a BN wire. This 
signal is used by the power amplifier for the LH rear speakers.
zA negative signal is provided by the head unit to the power amplifier on a BR wire. This 
signal is used by the power amplifier for the LH rear speakers. 
						

							DESCRIPTION AND OPERATION
4.142FREELANDER 03MY
The power amplifier (C0491) receives inputs from the head unit (C0092) and relays them to 
the speakers as follows:
NOTE: The LH and RH speakers share the same connector numbers as they utilise the 
same door harness.
zA positive signal is provided by the power amplifier to the RH front mid-range speaker 
(C0369) on an OK wire. The RH front mid-range speaker (C0369) is provided a 
negative signal by the power amplifier (C0491) on an OB wire.
zA positive signal is provided by the power amplifier to the RH front high range speaker 
(C0680) on an OK wire. The RH front high range speaker (C0680) is provided a 
negative signal by the power amplifier (C0491) on an OB wire.
zA positive signal is provided by the power amplifier to the LH front mid-range speaker 
(C0369) on a YK then OK wire. The LH front mid-range speaker (C0369) is provided a 
negative signal by the power amplifier (C0491) on a YB then OB wire.
zA positive signal is provided by the power amplifier to the LH front high range speaker 
(C0680) on a YK then OK wire. The LH front high range speaker (C0680) is provided 
a negative signal by the power amplifier (C0491) on an YB then OB wire.
zA positive signal is provided by the power amplifier to the RH rear mid-range speaker 
(C1577) on a UK wire. The RH rear mid-range speaker (C1577) is provided a negative 
signal by the power amplifier (C0491) on a UB wire.
zA positive signal is provided by the power amplifier to the RH rear high range speaker 
(C0679) on a UK wire. The RH rear high range speaker (C0679) is provided a negative 
signal by the power amplifier (C0491) on a UB wire.
zA positive signal is provided by the power amplifier to the LH rear mid-range speaker 
(C1577) on an SK then UK wire. The LH rear mid-range speaker (C1577) is provided 
a negative signal by the power amplifier (C0491) on an SB then UB wire.
zA positive signal is provided by the power amplifier to the LH rear high range speaker 
(C0679) on an SK then UK wire. The LH rear high range speaker (C0679) is provided 
a negative signal by the power amplifier (C0491) on an SB then UB wire.
NOTE: It is essential that all speakers are connected correctly. A speaker connected 
incorrectly will be out of phase with the remaining speakers, causing a deterioration of sound 
quality. 
						

							DESCRIPTION AND OPERATION
FREELANDER 03MY 4.143
Speakers – Standard
The head unit (C0092) is connected to the speakers as follows:
zA positive signal is provided to the RH front mid-range speaker (C0369) on an OK wire. 
The RH front mid-range speaker (C0369) is provided a negative signal by the head unit 
(C0092) on an OB wire.
zA positive signal is provided to the RH high range speaker (C0531) on an OK wire. The 
RH high range speaker (C0530) is provided a negative signal by the head unit (C0092) 
on an OB wire.
zA positive signal is provided to the LH front mid-range speaker (C0369) on a YK then 
OK wire. The LH front mid-range speaker (C0369) is provided a negative signal by the 
head unit (C0092) on a YB then OB wire.
zA positive signal is provided to the LH front high range speaker (C0531) on a YK then 
OK wire. The LH front high range speaker (C0530) is provided a negative signal by the 
head unit (C0092) on a YB then OB wire.
zA positive signal is provided to the RH rear mid-range speaker (C1577) on a UK wire. 
The RH rear mid-range speaker is provided a negative signal by the head unit (C0092) 
on a UB wire.
zA positive signal is provided to the LH rear mid-range speaker (C1577) on an SK then 
UK wire. The RH rear mid-range speaker is provided a negative signal by the head unit 
(C0092) on an SB then UB wire.
NOTE: The LH and RH front speakers and the LH and RH rear speakers share the same 
connector numbers as they utilise the same door harness.
NOTE: It is essential that all speakers are connected correctly. A speaker connected 
incorrectly will be out of phase with the remaining speakers, causing a deterioration of sound 
quality.
Remote Interface Unit
The remote interface unit (C1897) is provided an ignition feed via fuse 11 of the passenger 
compartment fuse box (C0580) on an LGW wire. The interface unit enables the head unit to 
communicate with the remote audio controls, and is earthed on a B wire. 
						

							DESCRIPTION AND OPERATION
4.144FREELANDER 03MY
Remote Audio Controls
The remote interface unit (C1897) provides a feed via the rotary coupler (C0082) to the 
remote audio controls (C1254) on a BR wire. The remote audio controls contain a number 
of normally open switches and resistors. When either of the controls are moved, one of the 
switches closes and a voltage is returned to the interface unit (C1897) on a BW wire. The 
value of the voltage returned to the interface unit is dependent upon which way the controls 
are moved (and how many resistors are brought into the circuit). By measuring this returned 
voltage, the interface unit determines which function has been requested. The interface unit 
(C1897) converts this input into an Instrument (I) bus protocol message which it outputs to 
the head unit on a K wire. If a CD autochanger is fitted, this message is also relayed to the 
CD autochanger (C0941) on a K wire.
Speed Dependent Volume Control
The ABS ECU (C0501) provides a road speed signal to the power amplifier (C0491) on a 
WO wire. The amplifier uses this signal to raise or lower the volume level from the speakers 
as road speed changes.
CD Autochanger
The CD autochanger (C0941) is provided a constant battery feed via fuse 9 of the passenger 
compartment fuse box (C0585) on a P wire. The autochanger (C0941) is earthed on a pair 
of B wires.
The CD autochanger (C0941) provides the following signals to the head unit (C0983):
zA LH speaker positive signal on a KB wire.
zA LH speaker negative signal on a BK then B wire.
zA RH speaker positive signal on a YB wire.
zA RH speaker negative signal on a BY wire then B wire.
Navigation Inputs
The ABS ECU (C0501) provides a road speed signal to the Central Control Unit (CCU) 
(C0428) and the head unit (C0921) on a pair of WO wires. A reverse gear signal is provided 
by the reverse gear switch (C0166 on K1.8 vehicles, C0167 on Td4 manual vehicles) or the 
reverse lamp relay (C0935) on automatic transmission vehicles on a pair of GN wires. 
For detailed information on satellite navigation operation, refer to the  Navigation System  
section of the System Description and Operation Workshop manual. 
						

							DESCRIPTION AND OPERATION
FREELANDER 03MY 4.145
FUEL PUMP
DESCRIPTION
Td4
The fuel system on Td4 vehicles features a single fuel pump. The primary low pressure 
pump has been deleted. The secondary low pressure pump is now mounted in the RH rear 
wheel arch, and delivers diesel fuel to the high pressure FIP. For more information on the 
Td4 fuel system, refer to the  Fuel Delivery System – Td4  section of the System 
Description and Operation Workshop manual.
K Series and KV6
The electric fuel pump is mounted in the plastic fuel tank, and supplies fuel at a constant 
pressure to the fuel rail via a filter. The fuel rail distributes fuel equally to each of the four 
injectors. The system also incorporates a spill return line, which returns any unused fuel 
back to the tank.
For more information on the K Series and KV6 fuel systems, refer to the  Fuel Delivery 
System – K Series 1.8  and  Fuel Delivery System – K Series KV6  sections of the System 
Description and Operation Workshop manual.
OPERATION
Td4
General
Feed from the positive battery terminal (C0192) is supplied to fusible link 3, fuse 10, and the 
main relay (C0632) on an R wire. All are located in the engine compartment fuse box. 
Operation of the main relay (C0576) is controlled by the Engine Control Module (ECM) 
(C0603) on a WK wire. For more information on main relay operation, refer to the  Engine 
Management Systems – EDC  section of the System Description and Operation Workshop 
manual.
Fuse 10 (C0575) provides a constant battery feed to the inertia switch (C0123) on a G wire. 
Fusible link 3 (C0571) provides a constant battery feed to the ignition switch (C0028) on an 
N wire. When the ignition switch is turned to the ignition position, current flows across the 
switch (C0028) to fuse 6 of the passenger compartment fuse box (C0588) on a G wire. Fuse 
6 (C0581) provides an ignition feed to the ECM (C0603) on a W wire.