Land Rover Defender 2002 Electrical Library Rover Manual
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DESCRIPTION AND OPERATION 4.8DEFENDER 02MY Transponder Coil The transponder coil (C1318 on LHD, C0049 on RHD) is provided a battery value feed by the anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) on an OP wire. The anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) also provides the transponder coil (C1318 on LHD, C0049 on RHD) a pulsed feed on a OG wire. The transponder coil creates a magnetic field that excites a coil within the RF handset. This causes the RF handset to transmit a remobilisation code the anti-theft alarm ECU. NOTE: The transponder coil is only energised when the ignition switch is turned to the ignition position, and the engine is immobilised. Anti-Theft Alarm ECU Td5 When the anti-theft alarm ECU (C1979 on LHD, C0061 on RHD) receives an ignition feed via fuse 8 of the passenger compartment fuse box (C0508), it provides the Engine Control Module (ECM) (C0658) a coded digital signal on an LGS wire. If the coded signal matches the one expected by the ECM, the ECM will allow the engine to be started. For more information on engine starting, refer to the Starting and Charging – Td5 section of this manual. + STARTING AND CHARGING – Td5. 300 Tdi When the anti-theft alarm ECU (C1979 on LHD, C0061 on RHD) receives an ignition feed via fuse 8 of the passenger compartment fuse box (C0508) , it provides the immobilisation ECU (C0059) a coded digital signal on an LGS then B wire. If the coded signal matches the one expected by the immobilisation ECU, the immobilisation ECU will allow the engine to be started. For more information on engine starting, refer to the Starting and Charging – 300 Tdi section of this manual. + STARTING AND CHARGING – 300 Tdi.
DESCRIPTION AND OPERATION DEFENDER 02MY 4.9 Immobilisation Warning Lamp Fuse 30 of the passenger compartment fuse box (C0595) provides a constant battery feed to the immobilisation warning lamp (C1061) on a PN wire. The anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) also provides a feed to the warning lamp (C0233) on an O wire. As the potential difference across the bulb is 0 V, the lamp remains extinguished. To illuminate the lamp, the anti-theft alarm ECU withdraws the feed on the O wire and provides an earth path. By switching the feed/earth on and off, the immobilisation ECU can control the flashing sequence of the warning lamp. Starter Relay The starter relay coil (C0151) receives an engine crank feed from the ignition switch (C1731 on LHD, C0090 on RHD) on a WR wire. When the vehicle is immobilised, the anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) provides a feed to the other side of the relay coil (C0151) on a BO wire. When the anti-theft alarm ECU receives a valid re-mobilisation signal, it replaces the feed to the starter relay coil on the BO wire with an earth path. The energised starter relay is now able to provide a feed to either the starter motor (C0179) on an NR wire (Td5) or the immobilisation ECU (C0059) on an NR then B wire (300 Tdi). For more details on starting, refer to the Starting and Charging – Td5 or Starting and Charging – 300 Tdi sections of this manual. + STARTING AND CHARGING – Td5. + STARTING AND CHARGING – 300 Tdi.
DESCRIPTION AND OPERATION 4.10DEFENDER 02MY Immobilisation ECU – 300 Tdi Only The immobilisation ECU (C0059) receives an ignition feed via fuse 12 of the passenger compartment fuse box (C0580) on a WG then B wire, and is earthed on a B wire. When the ignition switch is turned to the ignition position, the anti-theft alarm ECU (C1979 on LHD, C0061 on RHD) provides a coded digital signal to the immobilisation ECU (C0059) on a LGS then B wire. When the ignition switch is turned to the crank position, the immobilisation ECU (C0059) receives a feed from the starter relay (C0151) on an NR then B wire. If the coded signal from the anti-theft alarm ECU has been accepted, the immobilisation ECU will provide a feed to the following on B wires: The fuel cut-off solenoid (C0198) The starter motor (C0179) The glow plug ECU (C0190). Diagnostic Socket The engine immobilisation system can be interrogated using TestBook via the diagnostic socket. The diagnostic socket (C0040) is connected to the anti-theft alarm ECU (C1979 on LHD, C0061 on RHD) by an LG wire.
DESCRIPTION AND OPERATION DEFENDER 02MY 4.11 WINDOWS DESCRIPTION Introduction Defender is now fitted with electric front windows, which operate when the ignition switch is turned to the ignition position. The window lift switches are non-latching, and are located on the fascia console. OPERATION Power Distribution Feed from the positive battery terminal (C0192) is supplied to fusible link 1 and fusible link 5 of the passenger compartment fuse box (C0632) on an N wire. Fusible link 1 is connected in series with fusible link 3, which is also located in the under seat fuse box. Fusible link 3 (C0571) provides a constant battery feed to the ignition relay (C0218) on an NR wire. Fusible link 5 (C0570) provides a constant battery feed to the ignition switch (C1043 on LHD, C0028 on RHD) on an NW wire. When the ignition switch is turned to the ignition position, current flows across the switch (C1732 on LHD, C0094 on RHD) to fuse 15 of the passenger compartment fuse box (C0580) on a W wire. Fuse 15 (C0580) provides an ignition feed to the ignition relay coil (C0218) on an LGP wire. The relay coil (C0218) is earthed on a B wire. RH Window The energised ignition relay (C0218) provides a feed to fuse 34 of the passenger compartment fuse box (C0595) on an NS wire. Fuse 34 (C0595) is connected to the RH window switch (C0242) by an SO wire. Up When the window switch is moved to the Up position, current flows across the switch (C0242) to the RH window lift motor (C0326) on an OR then R wire. The window lift motor (C0326) is provided an earth path via the window switch (C0242) on a U then OU then B wire. The window lift motor is now able to power the window up. Down When the window switch is moved to the Down position, current flows across the switch (C0242) to the RH window lift motor (C0326) on an OU then U wire. The window lift motor (C0326) is provided an earth path via the window switch (C0242) on an R then OR then B wire. The window lift motor is now able to power the window down.
DESCRIPTION AND OPERATION 4.12DEFENDER 02MY LH Window The energised ignition relay (C0218) provides a feed to fuse 35 of the passenger compartment fuse box (C0595) on an NS wire. Fuse 35 (C0595) is connected to the LH window switch (C0321) by an RG wire. Up When the window switch is moved to the Up position, current flows across the switch (C0321) to the LH window lift motor (C0326) on an R wire. The window lift motor (C0326) is provided an earth path via the window switch (C0321) on a U then B wire. The window lift motor is now able to power the window up. Down When the window switch is moved to the Down position, current flows across the switch (C0321) to the LH window lift motor (C0326) on a U wire. The window lift motor (C0326) is provided an earth path via the window switch (C0321) on an R then B wire. The window lift motor is now able to power the window down. NOTE: The RH and LH window lift motors have the same connector number as they are derived from the same harness drawing.
DESCRIPTION AND OPERATION DEFENDER 02MY 4.13 HEATED SEATS DESCRIPTION Introduction Defender is now fitted with heated front seats, which operate when the ignition switch is turned to the ignition position. The seat heat switches are latching switches, and are located on the fascia console. Each switch also contains a tell-tale LED. Both seat heater elements contain a thermostatically controlled switch. When the element temperature reaches 37 ± 3 °C (98 ± 3 °F), the thermostat cuts the supply to the heater elements for that seat. As the temperature of the heater elements falls to 28 ± 3 °C (82 ± 3 °F), the thermostat closes causing the elements to heat up again. OPERATION Power Distribution Feed from the positive battery terminal (C0192) is supplied to fusible link 1 and fusible link 5 of the under seat fuse box (C0632) on an N wire. Fusible link 1 is connected in series with fusible link 3, which is also located in the under seat fuse box. Fusible link 3 (C0571) provides a constant battery feed to the ignition relay (C0218) on an NR wire. Fusible link 5 (C0570) provides a constant battery feed to the ignition switch (C1043 on LHD, C0028 on RHD) on an NW wire. When the ignition switch is turned to the ignition position, current flows across the switch (C1732 on LHD, C0094 on RHD) to fuse 15 of the passenger compartment fuse box (C0580) on a W wire. Fuse 15 (C0580) provides an ignition feed to the ignition relay coil (C0218) on an LGP wire. The relay coil (C0218) is earthed on a B wire. The energised ignition relay (C0218) provides a feed to fuse 33 of the passenger compartment fuse box (C0595) on an NS wire. RH Seat Fuse 33 of the passenger compartment fuse box (C0595) provides a feed to the RH seat heat switch (C0249) on an LGW wire. When the seat heat switch is depressed, current flows across the switch contacts (C0249) to the seat heater element (C0237) on a UK then U wire. The heater element (C0237) is earthed on a B wire. LH Seat Fuse 33 of the passenger compartment fuse box (C0595) provides a feed to the LH seat heat switch (C0250) on an LGW wire. When the seat heat switch is depressed, current flows across the switch contacts (C0250) to the seat heater element (C0237) on a US then U wire. The heater element (C0237) is earthed on a B wire. NOTE: The seat heater elements have the same connector number as they utilise the same harness.
DESCRIPTION AND OPERATION 4.14DEFENDER 02MY DIAGNOSTIC SOCKET DESCRIPTION Introduction The diagnostic socket is located below the centre of the fascia. It allows communication to and from off board diagnostic tools, enabling detailed fault diagnosis checks to be carried out. The socket is compliant with SAE directive J1962 standard, and allows attachment of TestBook, T4 or any other diagnostic software and tools. OPERATION Power Distribution Feed from the positive battery terminal (C0192) is supplied to fusible link 1 of the under seat fuse box (C0632) on an N wire. Fusible link 1 is connected in series with fusible link 2, which is also located in the under seat fuse box. Fusible link 2 (C0570) is connected to fuse 30 of the passenger compartment fuse box (C0595) by an NK wire. Fuse 30 (C0595) provides a constant battery feed to the diagnostic socket (C0040) on a P wire. The diagnostic socket (C0040) is earthed on a pair of B wires. Diagnostic Socket The diagnostic socket (C0040) communicates with the following systems: The anti-theft alarm ECU (C1979 on LHD, C0061 on RHD) on an LG wire The Anti-Lock Braking System (ABS) ECU (C0504) on a K wire (Td5 vehicles only) The Engine Control Module (ECM) (C0658) on a K wire (Td5 vehicles only).
DESCRIPTION AND OPERATION DEFENDER 02MY 4.15 STARTING AND CHARGING – 300 Tdi 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. OPERATION Power Distribution Feed from the positive battery terminal (C0192) is supplied to fusible link 1 and fusible link 5 of the under seat fuse box (C0632) on an N wire. The battery (C0192) also provides a feed to the starter motor solenoid (C0823) on an R wire. Fusible link 1 (C0622) provides a constant battery feed to the glow plug ECU (C0190) on an N wire. Fusible link 5 (C0570) provides a constant battery feed to the starter relay (C0151) and the ignition switch (C1043 on LHD, C0028 on RHD) on NW wires. When the ignition switch is turned to the ignition position, current flows across the switch (C1732 on LHD, C0094 on RHD) to fuse 14 and fuse 15 of the passenger compartment fuse box (C0580) on a W wire. Fuse 14 (C0580) provides an ignition feed to the glow plug ECU (C0190) on an LGP then GY wire. Fuse 15 (C0580) provides an ignition feed to the ignition/no charge warning lamp located in the instrument pack (C0233) on a WG wire.
DESCRIPTION AND OPERATION 4.16DEFENDER 02MY Starting Glow Plug ECU When the glow plug ECU (C0190) receives an ignition feed via fuse 14 of the passenger compartment fuse box (C0580), it provides a feed to the following: Glow plug number 4 (C1039) on a YB wire Glow plug number 3 (C0478) on a YB wire Glow plug number 2 (C0477) on a YB wire Glow plug number 1 (C0476) on a YB wire The glow plug warning lamp (C0233) on a BY wire. The glow plugs are connected in parallel, and are all earthed via their fixings. The glow plug ECU (C0190) is earthed on a B wire. After a pre-determined time (or if the ignition switch is turned to the crank position) the glow plug ECU withdraws the feeds to the glow plugs. For more information, refer to the Starter Relay description later in this section. Glow Plug Warning Lamp The glow plug warning lamp (C0233) is located in the instrument pack, and is provided a feed by the glow plug ECU (C0190) on a BY wire when the ignition switch is turned to the ignition position. The glow plug warning lamp (C0230) is earthed on a B wire. After a pre- determined time (or if the ignition switch is turned to the crank position) the glow plug ECU withdraws the feed, extinguishing the warning lamp. Starter Relay When the ignition switch is turned to the crank position, current flows across the switch (C1731 on LHD, C0090 on RHD) to the starter relay coil (C0151) on a WR wire. The earth path for the starter relay coil (C0151) is controlled as follows: On vehicles with an anti-theft alarm system, the earth path is controlled by the anti-theft alarm ECU (C1980 on LHD, C0057 on RHD) on a BO wire. For more information, refer to the Anti-theft Alarm and Central Door Locking (CDL) section of this manual. + ANTI–THEFT ALARM AND CENTRAL DOOR LOCKING (CDL). On vehicles without an anti-theft alarm system fitted, the earth path is direct to earth on a B wire.
DESCRIPTION AND OPERATION DEFENDER 02MY 4.17 The energised starter relay (C0151) provides a feed to the immobilisation ECU (C0059) on an NR then B wire. If the vehicle has been successfully re-mobilised, the immobilisation ECU (C0059) provides a feed to the starter motor solenoid (C0179) on a B wire, and the glow plug ECU (C0190) on a B then NR wire. When the glow plug ECU receives the feed from the immobilisation ECU, it immediately cuts the feed to the glow plugs and the glow plug warning lamp. The feed supplied by the immobilisation ECU energises the starter motor solenoid. The energised starter motor solenoid allows a battery feed to power the starter motor on an R wire. Charging Alternator The battery (C0192) provides a permanent feed to the alternator (C0183) via the starter motor (C0178) on an R then N wire. 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 (C0192) by providing current on an N then R wire. Ignition/No Charge Warning Lamp Fuse 15 of the passenger compartment fuse box (C0580) provides an ignition feed to the ignition/no charge warning lamp (C0233) on a WG wire. The earth path for the warning lamp (C0233) is controlled by the alternator (C0185) on an NY wire. When the alternator outputs a voltage equal to that supplied by the battery, the warning lamp is extinguished as the potential difference across the lamp is 0 volts.