Land Rover Freelander 2003my Electrical Library Rover Manual
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DESCRIPTION AND OPERATION 4.6FREELANDER 03MY 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 03MY 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 03MY 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 (C0121) on a GR wire zThe RH rear direction indicator lamp (C0125) 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 03MY 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 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 4.10FREELANDER 03MY 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 03MY 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.
DESCRIPTION AND OPERATION 4.12FREELANDER 03MY WINDOWS DESCRIPTION Door Windows The front and rear electrically operated windows are opened and closed by using the appropriate non-latching switch mounted on the centre console. Rear window switches (if fitted) are also located on the rear door trim casings. Rear window operation can be controlled by the driver by pressing the rear window inhibit switch, which is also mounted on the centre console. The window lift system is controlled by the window lift ECU, which is located beneath the centre console, and will only operate when the ignition switch is in the ignition position. NOTE: When the ignition is switched off, the windows will still operate for approximately 40 seconds. This time out sequence will cease as soon as any of the doors are opened. This feature is not active on the tail door window. Tail Door Window The tail door window is opened and closed by using the non-latching switch mounted on the centre console, below the radio/cassette player. Tail door window operation is controlled by the Central Control Unit (CCU), and will only operate when the ignition switch is in the ignition position. NOTE: The 40 second time out function (see above) does not operate on the tail door window. Tail door window operation will cease as soon as the ignition is switched off. The tail door window can also be lowered using the remote handset. Pressing and holding the unlock button for approximately 2 seconds will inform the CCU to fully lower the tail door window. The tail door window can be raised by inserting the key in the tail door lock and turning it clockwise. NOTE: If the key is released before the tail door window has reached the top of its travel, the CCU will lower the window back to the fully open position. When the tail door handle is operated, a switch in the door handle informs the CCU to delay opening the door and to lower the window approximately 17 mm. This prevents the tail door from being opened with the window still engaged in the seal recess. When the tail door is closed, the CCU lifts the window to engage with the seal recess. NOTE: When the tail door is open, the tail door window can only be lowered. The window will only raise once the tail door is closed.
DESCRIPTION AND OPERATION FREELANDER 03MY 4.13 If the rear wiper is operational, the tail door window will not lower until the wiper is on a downward stroke. When the window is in the lowered position, wiper operation will be suspended. The tail door window will be disabled if any of the following occur: zThe soft back is lowered. zThe soft back is removed. zThe hard back is removed. Tail Door Window Calibration When the CCU is changed from transit mode to a valid market mode, and after the vehicle battery has been disconnected, the tail door window must be calibrated to provide the CCU with a window position datum. When the CCU mode is changed to a valid market, or the battery reconnected, the CCU automatically begins the calibration process by energising the down contacts in the window lift relay module until the window lift motor stalls, to ensure the window is fully down. The calibration procedure is completed as follows: 1. Ensure the tail door is closed, the vehicle unlocked and the alarm disarmed. 2. On three door models, ensure the roof is on (hard back) or lowered and secured (soft back). 3. With the ignition on, use the console switch or the vehicle key in the tail door lock to raise the window until the motor stalls with the window fully closed. 4. Switch off the ignition. NOTE: If the calibration procedure is unsuccessful, the CCU will sound a warning for approximately 0.8 seconds and fully lower the window. OPERATION Front Door Windows General Feed from the positive battery terminal (C0192) is supplied to fusible link 3 and fusible link 4 of the engine compartment fuse box (C0632) on an R wire. Fusible link 4 (C0574) provides a constant battery feed to the window lift relay (C0587) on an NW wire. Fusible link 4 (C0574) also provides a constant battery feed to the Central Control Unit (CCU) (C0592) on an NW wire. The CCU is mounted directly onto the rear of the passenger 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 8 of the passenger compartment fuse box (C0588) on a G wire. Fuse 8 provides an ignition feed to the CCU (C0593).
DESCRIPTION AND OPERATION 4.14FREELANDER 03MY Window Lift Relay The earth path for the window lift relay coil is controlled by the CCU (C0593). When the CCU (C0593) receives an ignition on feed from fuse 8 of the passenger compartment fuse box, it will energise the window lift relay. The energised window lift relay provides a feed to fuse 33 and fuse 34, which are also located in the passenger compartment fuse box. Driver Door Window – LHD Vehicles Fuse 33 of the passenger compartment fuse box (C0586) provides a feed to the driver door window switch (C0321) and the window lift ECU (C0341) on RG wires. The window lift ECU (C0341) is earthed on a B wire. When the driver door window switch is pressed to lower the window, current flows across the switch (C0321) to the window lift ECU (C0341) on an OG wire. The window lift ECU (C0341) now provides a feed to the driver door window lift motor (C0326) on an R then OR wire. Current flows across the motor (C0326) back to the window lift ECU (C0341) on an OU then U wire. The window lift ECU (C0341) is provided an earth path via the driver door window switch (C0321) on an OY wire. The driver door window switch (C0321) is earthed on a B wire. The window will now move to the fully lowered position. When the driver door window switch is pressed to raise the window, current flows across the switch (C0321) to the window lift ECU (C0341) on an OY wire. The window lift ECU (C0341) now provides a feed to the driver door window lift motor (C0326) on a U then OU wire. Current flows across the motor (C0326) back to the window lift ECU (C0341) on an OR then R wire. The window lift ECU (C0341) is provided an earth path via the driver window switch (C0321) on an OG wire. The driver door window switch (C0321) is earthed on a B wire. The window will now move to the fully raised position. Driver Door Window – RHD Vehicles Fuse 34 of the passenger compartment fuse box (C0586) provides a feed to the driver door window switch (C0242) and the window lift ECU (C0341) on SO wires. The window lift ECU (C0341) is earthed on a B wire. When the driver door window switch is pressed to lower the window, current flows across the switch (C0242) to the window lift ECU (C0341) on an OG wire. The window lift ECU (C0341) now provides a feed to the driver door window lift motor (C0326) on an R then OR wire. Current flows across the motor (C0326) back to the window lift ECU (C0341) on an OU then U wire. The window lift ECU (C0341) is provided an earth path via the driver door window switch (C0242) on an OY wire.
DESCRIPTION AND OPERATION FREELANDER 03MY 4.15 The driver door window switch (C0242) is earthed on a B wire. The window will now move to the fully lowered position. When the driver door window switch is pressed to raise the window, current flows across the switch (C0242) to the window lift ECU (C0341) on an OY wire. The window lift ECU (C0341) now provides a feed to the driver door window lift motor (C0326) on a U then OU wire. Current flows across the motor (C0326) back to the window lift ECU (C0341) on an OR then R wire. The window lift ECU (C0341) is provided an earth path via the driver door window switch (C0242) on an OG wire. The driver door window switch (C0242) is earthed on a B wire. The window will now move to the fully raised position. Front Passenger Door Window – LHD Vehicles Fuse 34 of the passenger compartment fuse box (C0586) provides a feed to the front passenger door window switch (C0242) on an SO wire. When the passenger door window switch is pressed to lower the window, current flows across the switch (C0242) to the passenger door window lift motor (C0326) on an OR wire. Current flows across the motor (C0326) and back to the passenger door window switch (C0242) on an OU wire. The motor is provided an earth path via the passenger door window switch (C0242) on a B wire. The passenger door window will now move downwards until the switch is released. When the passenger door window switch is pressed to raise the window, current flows across the switch (C0242) to the passenger door window lift motor (C0326) on an OU wire. Current flows across the motor (C0326) and back to the passenger door window switch (C0242) on an OR wire. The motor is provided an earth path via the passenger door window switch (C0242) on a B wire. The passenger door window will now move upwards until the switch is released. Front Passenger Door Window – RHD Vehicles Fuse 33 of the passenger compartment fuse box (C0586) provides a feed to the front passenger door window switch (C0321) on an RG wire. When the passenger door window switch is pressed to lower the window, current flows across the switch (C0321) to the passenger door window lift motor (C0326) on an R then OR wire. Current flows across the motor (C0326) and back to the passenger door window switch (C0321) on an OU then U wire. The motor is provided an earth path via the passenger door window switch (C0321) on a B wire. The passenger door window will now move downwards until the switch is released.