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

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    							DESCRIPTION AND OPERATION
    4.40FREELANDER 02MY
    CHARGING AND STARTING – KV6 (NORTH AMERICA)
    DESCRIPTION
    Starting
    The starting system on the vehicle comprises a 12 volt starter motor which drives the engine 
    to start the combustion process. The starter converts electrical energy into mechanical 
    power. The vehicle electrical system must be capable of supplying sufficient power to enable 
    the engine to be cranked.
    Charging
    The charging system comprises a battery and an alternator. The battery must be of a 
    sufficient capacity to operate the starter motor and operate various electrical systems in the 
    vehicle. The alternator charges the battery when the engine is running and increases its 
    output as demand on the battery increases. 
    The instrument pack incorporates a charge warning lamp which illuminates when there is no 
    output or a low output from the alternator. For a detailed description of the charging and 
    starting system, refer to the  Engine Management Systems – Siemens (NAS)  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, 
    fuse 10, and the main relay (C0632) on an R wire. All are located in the engine compartment 
    fuse box. The battery (C0192) also provides a feed to the starter motor solenoid (C0178) on 
    an R wire.
    Fusible link 1 is connected in series with fusible link 7, which is also located in the engine 
    compartment fuse box.
    Fusible link 3 (C0571) is connected to the ignition switch (C0028) by an N wire. When the 
    ignition switch is turned to the ignition position, current flows across the switch (C0028) to 
    fuse 6, fuse 8, and fuse 19 of the passenger compartment fuse box (C0588) on a G 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.
    Starting
    Main Relay
    Fuse 6 of the passenger compartment fuse box (C0581) provides an ignition feed to the 
    Engine Control Module (ECM) (C0603) on a W wire. When the ECM receives this feed, it 
    energises the main relay by providing an earth path for the relay coil (C0578) on an NG wire. 
    The energised main relay is now able to provide a feed to the fuel pump relay. The fuel pump 
    relay is also located in the engine compartment fuse box. 
    						
    							DESCRIPTION AND OPERATION
    FREELANDER 02MY 4.41
    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. If the 
    inertia switch hasnt been tripped, current flows across the switch (C0123) to the fuel pump 
    relay (C0575) on a GU wire.
    The inertia switch (C0123) also provides a feed to the Central Control Unit (CCU) (C0428) 
    on a UG wire. For more information on the CCU, refer to the  Control Units  section of the 
    Workshop manual, and the  Anti-theft Alarm and Central Door Locking (CDL)  section of 
    this manual.
     
    +  ANTI-THEFT ALARM AND CENTRAL DOOR LOCKING (CDL). 
    Fuel Pump Relay
    The fuel pump relay coil receives a feed from the energised main relay (see above). The 
    earth path for the relay coil (C0575) is controlled by the ECM (C0331) on a BP wire. The 
    ECM will energise the fuel pump relay when it receives an ignition feed from fuse 6 of the 
    passenger compartment fuse box (C0581) on a W wire.
    The energised fuel pump relay (C0572) provides a feed to the fuel pump (C0114) on a WP 
    wire. The fuel pump (C0114) is earthed on a B wire.
    Starter Relay
    Fuse 5 of the passenger compartment fuse box (C0581) provides an ignition switch crank 
    feed to the immobilisation ECU (C0059) on a WR wire. If the vehicle has been successfully 
    re-mobilised, the immobilisation ECU (C0059) provides a feed to the starter relay coil 
    (C0576) on a RW wire. The starter relay is located in the engine compartment fuse box, and 
    is earthed (C0576) on a B wire. A feed from fusible link 7 is now able to flow across the 
    starter relay switch contacts (C0572) to the starter motor solenoid (C0179) on an NR wire.
    For a detailed description of the immobilisation ECU, refer to the  Engine Immobilisation  
    section of this manual.
     
    +  ENGINE IMMOBILISATION. 
    Starter Motor and Starter Motor Solenoid
    The starter motor solenoid coil (C0179) receives a feed from the energised starter relay 
    (C0572) on an NR wire (see above). The energised starter motor solenoid allows a battery 
    feed (C0178) to flow across the switch contacts and power the starter motor.  
    						
    							DESCRIPTION AND OPERATION
    4.42FREELANDER 02MY
    Central Control Unit (CCU)
    The CCU (C0428) receives a feed from the inertia switch (C0123) via the engine 
    compartment fuse box (C0576) on a UG wire. If this feed is removed due to the inertia switch 
    being tripped, the CCU will unlock all of the doors. For more details of the Central Door 
    Locking (CDL) system, refer to the  Anti-theft Alarm and Central Door Locking (CDL)  
    section of this manual.
     
    +  ANTI-THEFT ALARM AND CENTRAL DOOR LOCKING (CDL). 
    NOTE: The CCU will only unlock all doors if the ignition switch is in the ignition position.
    The CCU (C0429) also provides a signal feed to the immobilisation ECU (C0059) on a KN 
    wire. This signal feed informs the immobilisation ECU to energise the starter relay. For a 
    detailed description of the immobilisation ECU, refer to the  Engine Immobilisation  section 
    of this manual.
     
    +  ENGINE IMMOBILISATION. 
    Charging
    Alternator
    Fusible link 1 of the engine compartment fuse box (C0826) provides a constant battery feed 
    to the alternator (C0183) on an R wire. Fuse 19 of the passenger compartment fuse box 
    (C0581) provides an ignition feed to the alternator (C0053) on a W wire. 
    When the engine is turned over, the alternator (C0053) supplies the ECM (C0331) with a 
    Pulse Width Modulated (PWM) signal on a GK wire. The ECM uses this PWM signal to 
    calculate the electrical load on the alternator, and controls engine idle speed accordingly.
    When the engine is started, the magnetised rotor within the stator windings generate 3 
    phase alternating current (ac) and voltage that rises rapidly with rotor speed. The field 
    diodes in the rectifier pack convert the ac current into direct current (dc). Output current from 
    the field diodes supplements the initial current flowing through the field windings. This 
    causes an increase in the magnetic influence of the rotor, resulting in self-exitation of the 
    alternator. The field current increases with rotor speed and thus increases the generated 
    current and voltage until the alternator is fully excited.
    The alternator (C0183) charges the battery by providing current via fusible link 1 of the 
    engine compartment fuse box (C0826 & C0632) to the battery positive terminal (C0192) on 
    an R wire.
    Ignition/No Charge Warning Lamp
    Fuse 8 of the passenger compartment fuse box (C0589) provides an ignition feed to the 
    ignition/no charge warning lamp (C0233) on a G wire. Current flows across the lamp 
    (C0233) and is provided an earth path by the alternator (C0053) on an NY wire. The warning 
    lamp will now illuminate.
    When the alternator is charging, it provides a feed to the warning lamp (C0233) on the NY 
    wire. Because the potential difference across the bulb is 0 V, the lamp will now extinguish. 
    						
    							DESCRIPTION AND OPERATION
    FREELANDER 02MY 4.43
    CRUISE CONTROL – Td4 (01MY)
    DESCRIPTION
    General
    Cruise control is switched on by pressing the cruise control master switch mounted on the 
    centre console. The Set + and Res switches mounted on the steering wheel allow the 
    driver to either set the vehicle speed as required or resume the last cruising speed set.
    The cruise control system uses mechanical, electrical and vacuum operated devices to 
    maintain vehicle speed at a setting selected by the driver. As vehicle speed changes due to 
    changes in road gradients, so the cruise control ECU operates the cruise control pump, 
    continually moving the cruise control actuator to maintain the set vehicle speed.
    Should the driver wish to increase the speed of the vehicle, the Set + switch should be 
    pressed and held. The vehicle will accelerate until the switch is released. As the Set + 
    switch is released, the cruise control ECU will store the new cruise speed in its memory.
    With cruise control switched on, it is possible to press the accelerator pedal and accelerate 
    through the memorised set speed. When the accelerator is released, the cruise control ECU 
    will automatically return the vehicle to its set speed. 
    Note: The cruise control system will only operate between speeds of 22 mph (35 kph) and 
    125 mph (200 kph).
    Cruise control operation can be suspended by one of the following ways:
    By pressing the Res switch.
    By pressing the brake pedal.
    The gearbox is placed in park, neutral, or reverse.
    Hill Descent Control (HDC) is active.
    Engine revs are too high.
    Under all these conditions, the cruise control set speed will be memorised. Cruise control 
    operation can be resumed by pressing the Res switch.
    Cruise control operation can be cancelled in one of two ways:
    By pressing the cruise control master switch located on the centre console.
    By switching the ignition off.
    In both these cases, the cruise control set speed will be lost.
    Warning: Do not switch off the vehicle ignition unless the vehicle is stationary and 
    the handbrake is applied. 
    						
    							DESCRIPTION AND OPERATION
    4.44FREELANDER 02MY
    OPERATION
    General
    Feed from the positive battery terminal (C0192) is supplied to the main relay, the horn relay, 
    and fusible link 3 (C0632) on an R wire. All are located in the engine compartment fuse box. 
    The earth path for the main relay (C0576) is controlled by the ECM (C0603) on a WK wire. 
    The energised main relay provides a feed to fuse 4, which is also located in the engine 
    compartment fuse box. For more information on main relay operation, refer to the  Engine 
    Management System – EDC  section of the System Description and Operation Workshop 
    manual.
    Fusible link 3 (C0571) is connected to the ignition switch (C0028) by an N wire. When the 
    ignition switch is turned to the ignition position, current flows across the switch (C0028) to 
    fuse 35 of the passenger compartment fuse box (C0588) on a G wire.
    Cruise Control Master Switch
    Cruise control is switched on and off by pressing the master switch mounted on the centre 
    console. Fuse 35 of the passenger compartment fuse box (C0580) supplies the cruise 
    control master switch (C0749) an ignition feed on a W wire. When the switch is pressed, 
    current flows across the switch contacts (C0749) to the cruise control interface unit (C1959) 
    on a WY wire.
    NOTE: When the cruise control system is switched off using the master switch, any stored 
    road speed values will be lost.
    Cruise Control Interface Unit
    Fuse 4 of the engine compartment fuse box (C0575) provides a feed to the cruise control 
    interface unit (C1959) on an NK wire. The interface unit (C1959) is earthed on a B wire. To 
    enable it to control the cruise control system, the ECU receives a number of inputs from 
    various sources as follows:
    ABS ECU
    The ABS ECU (C0500) provides a road speed signal to the cruise control interface unit 
    (C1959) via the CAN-BUS on YN (Low) and YB (High) wires. For more information on the 
    CAN-BUS road speed signal, refer to the  Communication Databuses  section of the 
    Workshop manual. 
    						
    							DESCRIPTION AND OPERATION
    FREELANDER 02MY 4.45
    Set + Switch
    A constant battery feed is supplied to the rotary coupler (C0082) via the horn relay (C0576) 
    on a PY wire. Current flows across the rotary coupler (C1254) to the cruise control switches. 
    The Set + switch is a normally open, non-latching switch. When the switch is pulled forward, 
    the switch contacts close. Current flows across the switch back to the rotary coupler. The 
    rotary coupler (C0082) is connected to the cruise control interface unit (C1959) by an RW 
    wire. 
    The interface unit (C1959) converts the signals received from the Set + switch, and relays 
    information to the Engine Control Module (ECM) (C0331) on an RG wire. The signal 
    provided by the interface unit is a continuous, pulsed voltage, varying from approximately 6 
    V to 8 V. By measuring the frequency of the pulses, the ECM is able to control vehicle speed 
    in accordance to requests from the Set + switch.
    Res switch
    A constant battery feed is supplied to the rotary coupler (C0082) via the horn relay (C0576) 
    on a PY wire. Current flows across the rotary coupler (C1254) to the cruise control switches. 
    The Res switch is a normally open, non-latching switch. When the switch is pulled forward, 
    the switch contacts close. Current flows across the switch back to the rotary coupler. The 
    rotary coupler (C0082) is connected to the cruise control interface unit (C1959) by a UW 
    wire. 
    The interface unit (C1959) converts the signals received from the Res switch, and relays 
    information to the ECM (C0331) on an RG wire. The signal provided by the interface unit is 
    a continuous, pulsed voltage, varying from approximately 6V to 8V. By measuring the 
    frequency of the pulses, the ECM is able to control vehicle speed in accordance to requests 
    from the Res switch.
    Brake Pedal Switch
    Fuse 35 of the passenger compartment fuse box (C0580) provides an ignition feed to the 
    hall effect brake pedal switch (C0652) on a W wire. The brake pedal switch (C0652) is 
    earthed on a B wire.
    When the brake pedal is in the rest position, only a nominal voltage (between approximately 
    0 V and 2 V) is supplied to the ECM (C0331) on GR and PG wires. When the brake pedal is 
    pressed, this voltage rises to approximately battery voltage. Sensing this increase, the ECM 
    suspends cruise control operation.
    Electronic Automatic Transmission (EAT) ECU
    When cruise control is active, the cruise control interface unit (C1959) provides a feed to the 
    EAT ECU (C0932) on a WU wire. When the EAT ECU receives this feed, it enters its cruise 
    control mode. For more information on EAT operation, refer to the  Electronic Automatic 
    Transmission (EAT) – 01MY  section of this manual.
     
    +  ELECTRONIC AUTOMATIC TRANSMISSION (EAT) – 01MY.  
    						
    							DESCRIPTION AND OPERATION
    4.46FREELANDER 02MY
    Instrument Pack
    When cruise control is operational, the cruise control interface unit (C1959) sends a cruise 
    active message to the instrument pack (C0230) via the CAN-BUS on YN (low) and YB (high) 
    wires. This message is used to illuminate the cruise control lamp housed within the 
    instrument pack. 
    						
    							DESCRIPTION AND OPERATION
    FREELANDER 02MY 4.47
    CRUISE CONTROL – TD4 (02MY) & KV6 (NORTH AMERICA)
    DESCRIPTION
    General
    Cruise control is switched on by pressing the cruise control master switch mounted on the 
    centre console. The Set + and Res switches mounted on the steering wheel allow the 
    driver to either set the vehicle speed as required or resume the last cruising speed set.
    The cruise control system uses mechanical, electrical and vacuum operated devices to 
    maintain vehicle speed at a setting selected by the driver. As vehicle speed changes due to 
    changes in road gradients, so the cruise control ECU operates the cruise control pump, 
    continually moving the cruise control actuator to maintain the set vehicle speed.
    Should the driver wish to increase the speed of the vehicle, the Set + switch should be 
    pressed and held. The vehicle will accelerate until the switch is released. As the Set + 
    switch is released, the cruise control ECU will store the new cruise speed in its memory.
    With cruise control switched on, it is possible to press the accelerator pedal and accelerate 
    through the memorised set speed. When the accelerator is released, the cruise control ECU 
    will automatically return the vehicle to its set speed. 
    Note: The cruise control system will only operate between speeds of 22 mph (35 kph) and 
    125 mph (201 kph).
    Cruise control operation can be suspended by one of the following ways:
    By pressing the Res switch.
    By pressing the brake pedal.
    The gearbox is placed in park, neutral, or reverse.
    Hill Descent Control (HDC) is active.
    Engine revs are too high.
    Under all these conditions, the cruise control set speed will be memorised. Cruise control 
    operation can be resumed by pressing the Res switch.
    Cruise control operation can be cancelled in one of two ways:
    By pressing the cruise control master switch located on the centre console.
    By switching the ignition off.
    In both these cases, the cruise control set speed will be lost.
    Warning: Do not switch off the vehicle ignition unless the vehicle is stationary and 
    the handbrake is applied. 
    						
    							DESCRIPTION AND OPERATION
    4.48FREELANDER 02MY
    OPERATION
    General
    Feed from the positive battery terminal (C0192) is supplied to the main relay, the horn relay, 
    and fusible link 3 (C0632) on an R wire. All are located in the engine compartment fuse box. 
    The earth path for the main relay (C0576) is controlled by the ECM (C0604) on an NG wire. 
    The energised main relay provides a feed to fuse 4, which is also located in the engine 
    compartment fuse box. For more information on main relay operation, refer to the  Engine 
    Management System – EDC  or  Engine Management System – Siemens (NAS)  section 
    of the System Description and Operation Workshop manual.
    Fusible link 3 (C0571) is connected to the ignition switch (C0028) by an N wire. When the 
    ignition switch is turned to the ignition position, current flows across the switch (C0028) to 
    fuse 35 of the passenger compartment fuse box (C0588) on a G wire.
    Cruise Control Master Switch
    Cruise control is switched on and off by pressing the master switch mounted on the centre 
    console. Fuse 35 of the passenger compartment fuse box (C0580) supplies the cruise 
    control master switch (C0749) an ignition feed on a W wire. When the switch is pressed, 
    current flows across the switch contacts (C0749) to the cruise control interface unit (C1959) 
    on a WY wire.
    NOTE: When the cruise control system is switched off using the master switch, any stored 
    road speed values will be lost.
    Cruise Control Interface Unit
    Fuse 4 of the engine compartment fuse box (C0575) provides a feed to the cruise control 
    interface unit (C1959) on an NK wire. The interface unit (C1959) is earthed on a B wire. To 
    enable it to control the cruise control system, the ECU receives a number of inputs from 
    various sources as follows:
    ABS ECU
    The ABS ECU (C0501) provides a road speed signal to the cruise control interface unit 
    (C1959) via the CAN-BUS on YN (Low) and YB (High) wires. For more information on the 
    CAN-BUS road speed signal, refer to the  Communication Databuses  section of the 
    System Description and Operation Workshop manual. 
    						
    							DESCRIPTION AND OPERATION
    FREELANDER 02MY 4.49
    Set + Switch
    A constant battery feed is supplied to the rotary coupler (C0082) via the horn relay (C0576) 
    on a PY wire. Current flows across the rotary coupler (C1254) to the cruise control switches. 
    The Set + switch is a normally open, non-latching switch. When the switch is pulled forward, 
    the switch contacts close. Current flows across the switch back to the rotary coupler. The 
    rotary coupler (C0082) is connected to the cruise control interface unit (C1959) by an RW 
    wire. 
    The interface unit (C1959) converts the signals received from the Set + switch, and relays 
    information to the Engine Control Module (ECM) (C0331) on an RG wire. The signal 
    provided by the interface unit is a continuous, pulsed voltage, varying from approximately 6 
    V to 8 V. By measuring the frequency of the pulses, the ECM is able to control vehicle speed 
    in accordance to requests from the Set + switch.
    Res switch
    A constant battery feed is supplied to the rotary coupler (C0082) via the horn relay (C0576) 
    on a PY wire. Current flows across the rotary coupler (C1254) to the cruise control switches. 
    The Res switch is a normally open, non-latching switch. When the switch is pulled forward, 
    the switch contacts close. Current flows across the switch back to the rotary coupler. The 
    rotary coupler (C0082) is connected to the cruise control interface unit (C1959) by a UW 
    wire. 
    The interface unit (C1959) converts the signals received from the Res switch, and relays 
    information to the ECM (C0331) on an RG wire. The signal provided by the interface unit is 
    a continuous, pulsed voltage, varying from approximately 6 V to 8 V. By measuring the 
    frequency of the pulses, the ECM is able to control vehicle speed in accordance to requests 
    from the Res switch.
    Brake Pedal Switch
    Fuse 35 of the passenger compartment fuse box (C0580) provides an ignition feed to the 
    hall effect brake pedal switch (C0652) on a W wire. The brake pedal switch (C0652) is 
    earthed on a B wire.
    When the brake pedal is in the rest position, only a nominal voltage (between approximately 
    0V and 2V) is supplied to the ECM (C0331) on GR and PG wires. When the brake pedal is 
    pressed, this voltage rises to between approximately 6V and battery voltage. Sensing this 
    increase, the ECM suspends cruise control operation.
    Electronic Automatic Transmission (EAT) ECU
    When cruise control is active, the cruise control interface unit (C1959) provides a feed to the 
    EAT ECU (C0932) on a WU wire. When the EAT ECU receives this feed, it enters its cruise 
    control mode. For more information on EAT operation, refer to the   Electronic Automatic 
    Transmission (EAT) – 02MY   section of this manual.
     
    +  ELECTRONIC AUTOMATIC TRANSMISSION (EAT) – 02MY.  
    						
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