Land Rover Freelander 2004my Electrical Library Rover Manual
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DESCRIPTION AND OPERATION 4.2FREELANDER 04MY 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 (C0580) on an NO wire. Fusible link 4 (C0574) provides a constant battery feed to the CCU (C0593), fuse 14, and fuse 15 of the passenger compartment fuse box (C0581) on an NW wire. Fuse 15 provides a feed to the CCU (C0593). 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 (C0580) 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: zTo the driver door switch (C0441) on a PS then PW wire. zTo the passenger door switch (C0441) on a PW wire. zTo the LH rear door switch (C0442) on a PW wire. zTo the RH rear door switch (C0442) on a PW wire. zTo 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 04MY 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 (C0580) 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. The inertia switch (C0123) is connected to the CCU (C0428) via the engine compartment fuse box by a GU then UG 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.
DESCRIPTION AND OPERATION 4.4FREELANDER 04MY 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. 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. Central Door Locking Switches A non-latching CDL rocker switch is located in each front door switch pack. When the lock half of either switch is pressed, current is able to flow from the CCU (C0428) to the 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 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. NOTE: Both CDL rocker switches have the same connector number as they utilise the same harness.
DESCRIPTION AND OPERATION FREELANDER 04MY 4.5 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. 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.
DESCRIPTION AND OPERATION 4.6FREELANDER 04MY 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. 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.
DESCRIPTION AND OPERATION FREELANDER 04MY 4.7 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. 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.
DESCRIPTION AND OPERATION 4.8FREELANDER 04MY 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: zThe LH rear direction indicator lamp (C0928) on a GR wire zThe RH rear direction indicator lamp (C0837) on a GW wire zThe LH front direction indicator lamp (C0009) on a GR wire zThe RH front direction indicator lamp (C0011) on a GW wire zThe 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 FREELANDER 04MY 4.9 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 13 of the passenger compartment fuse box (C0587) by an NW wire. Fuse 13 (C0583) 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 27 of the passenger compartment fuse box (C0588) on a PS wire. Fuse 27 (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 via the passenger compartment fuse box (C0587) on a B wire.
DESCRIPTION AND OPERATION 4.10FREELANDER 04MY 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. 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.
DESCRIPTION AND OPERATION FREELANDER 04MY 4.11 Starter Relay If the vehicle has been successfully re-mobilised, the immobilisation ECU (C0059) provides a feed to the starter relay coil (C0576) on an RW wire. The relay coil (C0576) is earthed on a B wire. The energised relay allows a feed from fusible link 7 to flow across the relay switch contacts (C0572) to the starter motor (C0179) on an NR wire (NR then B on Td4 vehicles). For more details of starter motor operation, refer to the Charging and Starting – Td4 , Charging and Starting – K Series or Charging and Starting – KV6 sections of this manual. + CHARGING AND STARTING – Td4. + CHARGING AND STARTING – K SERIES. + CHARGING AND STARTING – KV6. Diagnostic Socket The diagnostic socket (C0040) is connected to the immobilisation ECU (C0059) by a K wire, enabling the immobilisation ECU to be interrogated by TestBook or T4.