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Land Rover Discovery 99my To 03my Electrical Library 3rd Edition Rover Manual
Land Rover Discovery 99my To 03my Electrical Library 3rd Edition Rover Manual
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DESCRIPTION AND OPERATION 4.10DISCOVERY SERIES II CDL motor operation The electronic relays in the passenger compartment fusebox supply power feeds or earth paths for each door lock motor as necessary. Each door lock motor is connected to the passenger compartment fusebox as follows: Front LH/RH (drivers) door lock motor: zA KR wire is connected from the fusebox to the LH/RH front CDL motor. zA KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the LH/RH front superlock motor and the LH/RH front CDL motor. zA KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the LH/RH front superlock motor. Front LH/RH (Passenger) door lock motor: zA KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD, to the LH/RH front CDL motor. zA KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the LH/RH front superlock motor and the LH/RH front CDL motor. zA KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the LH/RH front superlock motor. LH rear passenger door lock motor: zA KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD, and header C0761, to the LH rear CDL motor. zA KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the LH rear superlock motor and the LH rear CDL motor. zA KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the LH rear superlock motor. RH rear passenger door lock motor: zA KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD and header C0761, to the RH rear CDL motor. zA KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD to the RH rear CDL motor and the RH rear superlock motor. zA KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the RH rear superlock motor. Tail door lock motor: zA KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD, to the tail door CDL motor. zA KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the tail door CDL motor and the tail door superlock motor. zA KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the tail door superlock motor.
DESCRIPTION AND OPERATION DISCOVERY SERIES II 4.11 WINDOWS - FRONT DESCRIPTION Windows - Front Description The front windows are electrically operated from two rocker switches located in the centre console. The front windows are controlled by the Body Control Unit (BCU) which limits the operation of the windows to when the ignition is in position II and for a period of 44 seconds after the ignition is switched off or after the driver’s door is opened. The front window operation is suspended when the ignition switch is in the crank position III. The front windows are powered by electric motors located in each front door. The window up/down functions are controlled by reversing the polarity to the motors. The BCU logic circuits have a stall detect function that monitors the current drawn by the window motor. When the window contacts the top of the door frame or an obstruction the current drawn by the electric motor rises. If the BCU detects a sudden current rise the internal logic will remove the power supply to the front window motor. The front windows have a one shot down function which operates if the switch is pressed for less than 0.4 seconds. Operation of the switch for more than 0.4 seconds operates the windows in inch down mode. The windows stop when the switch is released. The front windows only operate in the inch up mode for as long as the switch is pressed. The windows stop when the switch is released. Fault conditions related to the front windows can be retrieved from the BCU via the diagnostic socket using TestBook/T4. OPERATION Windows - Front Supply Circuit supply A feed from the battery positive terminal is connected on an R wire to the engine compartment fusebox where it passes through fusible links 1, 5 and 8 and fuse 13. Fusible links 1 and 5 are connected in series. A feed from fusible links 1 and 5 is connected from the fusebox on an NW wire to the passenger compartment fusebox, where it passes through fuse 34. From fuse 34, the feed is connected to pin C0664-7 of the BCU on an NG wire. This feed provides the power for the window lift motors. A feed from fuse 13 is connected from the fusebox on a PN wire to pin C0660-13 of the BCU. This feed is the permanent battery supply fo the BCU. A feed from fusible link 8 is connected on an NW wire to the passenger compartment fusebox and from the fusebox to the ignition switch on an N wire.
DESCRIPTION AND OPERATION 4.12DISCOVERY SERIES II Ignition switch supply With the ignition switch in position II, the feed from fusible link 8 passes through the ignition switch to fuse 29 in the passenger compartment fusebox on a Y wire. From fuse 29 the feed is connected to pin C0660-1 of the BCU on a GU wire. Windows - Front Operation BCU earth connection The BCU is earthed from pin C0660-11 on a B wire to earth header C0551. Front left window up The left window switch up contact is connected to pin C0660-18 on the BCU by a BS wire. When the switch is set to the up position an internal supply from the BCU flows along the BS wire through the contacts of the switch and to earth via earth header C0552 on a B wire. The BCU internal logic monitors the current flow from pin C0660-18 and uses this input as an up signal. The BCU routes power from the permanent feed from pin C0664-7 to pin C0664-4. From pin C0664-4, the power flows to connector interface C0463-6/C0744-6 on an SB wire, and from the connector interface to the LH front window motor on a SU wire. The motor is energised and drives the window mechanism towards the up position. The front left window motor is earthed via an SK wire to connector interface C0744-7/C0463- 7, and an SR wire from the connector interface to pin C0664-1 on the BCU. The BCU completes the earth via pin C0664-5 on a B wire to earth header C0018 LHD/C0017 RHD. Front left window down The left window switch down contact is connected to pin C0662-1 on the BCU by a BR wire. When the switch is set to the down position an internal supply from the BCU flows along the BR wire through the contacts of the switch and to earth via earth header C0552 on a B wire. The BCU internal logic monitors the current flow from pin C0662-1 and uses this input as a down signal. The BCU routes power from the permanent feed from pin C0664-7 to pin C0664-1. From pin C0664-1, the power flows to connector interface C0463-7/C0744-7 on an SR wire, and from the connector interface to the LH front window motor on a SK wire. The motor is energised and drives the window mechanism towards the down position. The front left window motor is earthed via an SU wire to connector interface C0744-6/C0463- 6, and an SB wire from the connector interface to pin C0664-4 on the BCU. The BCU completes the earth via pin C0664-5 on a B wire to earth header C0018 LHD/C0017 RHD.
DESCRIPTION AND OPERATION DISCOVERY SERIES II 4.13 Front right window up The right window switch up contact is connected to pin C0660-19 on the BCU by a BU wire. When the switch is set to the up position an internal supply from the BCU flows along the BU wire through the contacts of the switch and to earth via earth header C0552 on a B wire. The BCU internal logic monitors the current flow from pin C0660-19 and uses this input as an up signal. The BCU routes power from the permanent feed from pin C0664-7 to pin C0664-6, from pin C0664-6 on an SK wire to connector C0326-2 on the RH front window motor. The motor is energised and drives the window mechanism towards the up position. The front right window lift motor is earthed via an SK wire to connector C0664-2 on the BCU. The BCU completes the earth via pin C0664-5 on a B wire to earth header C0018 LHD/ C0017 RHD. Front right window down The right window switch down contact is connected to pin C0660-2 on the BCU by a BK wire. When the switch is set to the down position an internal supply from the BCU flows along the BK wire through the contacts of the switch and to earth via earth header C0552 on a B wire. The BCU internal logic monitors the current flow from pin C0660-2 and uses this input as a down signal. The BCU routes power from the permanent feed from pin C0664-7 to pin C0664-2. From pin C0664-2, the power flows to the RH front window motor on an SU wire. The motor is energised and drives the window mechanism towards the down position. The front right window motor is earthed via an SK wire to connector C0664-6 on the BCU. The BCU completes the earth via pin C0664-5 on a B wire to earth header C0018 LHD/ C0017 RHD. Ignition key modes Depending on the vehicle specification: The BCU controls operation of the front windows and will allow operation for a period of 44 seconds after the ignition switch is moved to the off position. On some models if the time is less than 44 seconds and the drivers door (or any door on some models) is opened the BCU will disable the function of the windows. On some models the BCU disables the windows as soon as the ignition is turned off. On all models the windows will not operate while the ignition key is turned to the cranking position III.
DESCRIPTION AND OPERATION 4.14DISCOVERY SERIES II WINDOWS - REAR DESCRIPTION Windows - Rear The rear windows are electrically operated from two rockers switches located in the centre console. A rocker switch located in each rear door trim panel also operates the corresponding rear window. A window lift isolation switch is located in the centre console. The isolation switch prevents rear window operation using the rear window switches in the rear door trims, but allows operation from the rear window switches in the centre console. Power to the rear window motors is enabled by the Intelligent Driver’s Module (IDM) which energises the rear window lift relay located in the passenger compartment fusebox. The rear window enable is operative when the ignition switch is in position II and for a period of 44 seconds after the ignition is switched off or after the drivers door is opened. The rear window operation is suspended when the ignition switch is in the crank position III. The rear windows are operated by electric motors located in each rear door. The window up/ down functions are controlled by reversing the polarity to the motors. OPERATION Windows - Rear Supply Circuit supply A feed from the battery positive terminal is connected on an R wire to the engine compartment fusebox, where it passes through fusible links 1, 6 and 8. Fusible links 1 and 6 are connected in series. A feed from fusible links 1 and 6 is connected from the engine compartment fusebox, on an NU wire, to the passenger compartment fusebox, where it passes through fuse 13. From fuse 13, the feed is connected to the contacts and the coil of the rear window lift relay located in the passenger compartment fusebox. A feed from fusible link 8 is connected from the engine compartment fusebox, on an NW wire, to the passenger compartment fusebox. From the passenger compartment fusebox the feed is connected to the ignition switch on an N wire.
DESCRIPTION AND OPERATION DISCOVERY SERIES II 4.15 Ignition switch supply With the ignition switch in position II, the feed from fusible link 8 passes through the ignition switch to fuse 29 in the passenger compartment fusebox on a Y wire. When the ignition switch is in position II, the feed from fuse 29 is connected to the IDM. The IDM logic connects the feed from fuse 13 in the passenger compartment fusebox through the coil of the rear window lift relay, to earth header C0551 on a B wire. This supply energises the coil of the rear window lift relay. The contacts of the rear window lift relay close when the coil is energised and allow the feed from fuse 13 to pass through the rear window lift relay contacts. The feed is connected from the passenger compartment fusebox to splice joint A183 by a WK wire. The feed is then connected on four WK wires to the LH and RH window console switches. Windows - Rear Operation LH rear window console switch - down Operation of the LH window console switch in the down position, allows the feed from the rear window lift relay to pass through the up switch contacts to the LH rear window switch on an SW wire. The feed passes through the up switch contacts and is connected to the LH rear window motor on an SO wire. When the LH window console switch is set in the down position, the contacts complete the earth path for the LH rear window motor. The LH rear window motor is earthed via an SR wire to the LH rear window switch. From the down contacts of LH rear window switch the earth continues on an SY wire to the closed contacts of LH window console switch. From the contacts of the LH rear console switch the earth continues on a B wire to earth header C0552. LH rear window console switch - up Operation of the LH window console switch in the up position, allows the feed from the rear window lift relay to pass through the down switch contacts to the LH rear window switch on an SY wire. The feed passes through the down switch contacts and is connected to the LH rear window motor on an SR wire. When the LH window console switch is set in the up position, the contacts complete the earth path for the LH rear window motor. The earth path from the LH rear window motor is connected to the LH rear window switch on an SO wire. The earth continues through the up switch contacts and is connected to the LH window console switch on an SW wire. The earth passes through the down switch contacts and is connected to earth header C0552 on a B wire.
DESCRIPTION AND OPERATION 4.16DISCOVERY SERIES II RH rear window console switch - down Operation of the RH window console switch in the down position, allows the feed from the rear window lift relay to pass through the up switch contacts to the RH rear window switch on an SY wire. The feed passes through the up switch contacts and is connected to the RH rear window motor on an SO wire. When the RH window console switch is set in the down position, the contacts complete the earth path for the RH rear window motor. The RH rear window motor is earthed via an SR wire to the down contacts of the RH rear window switch, then on a SW wire to connector interface C0650-3/C0804-3. From this interface the feed continues on a SN wire to the RH window console switch. From the RH window console switch the earth continues via the closed down contacts, via a B wire to earth header C0552. RH rear window console switch - up Operation of the RH window console switch in the up position, allows the feed from the rear window lift relay to pass through the down switch contacts on an SN wire to connector interface C0650-3/C0804-3. From this interface the feed continues on a SW wire to the RH rear window switch. The feed passes through the down switch contacts and is connected to the RH rear window motor on an SR wire. When the RH window console switch is set in the up position, the contacts complete the earth path for the RH rear window motor. The earth path from the RH rear window motor is connected to the RH rear window switch on an SO wire. The earth continues on an SY wire to the up contacts of the RH rear window console switch. From the RH rear window console switch the earth continues on a B wire to earth header C0552. LH rear window switch - down Operation of the LH rear window switch in the down position, allows the feed from the rear window lift relay to pass through the up contacts of the LH window console switch on an SW wire. The feed passes through the up switch contacts and is connected to the LH rear window motor on an SO wire. When the LH rear window switch is set in the down position, the contacts complete the earth path for the LH rear window motor. The earth path from the LH rear window motor is connected to the LH rear window switch on an SR wire. The earth continues through the down switch contacts and is connected via splice joint A358 to the window lift isolation switch on an SG wire. The earth is connected from the closed contacts of the window lift isolation switch on a B wire to earth header C0552.
DESCRIPTION AND OPERATION DISCOVERY SERIES II 4.17 LH rear window switch - up Operation of the LH rear window switch in the up position, allows the feed from the rear window lift relay to pass through the down contacts of the LH window console switch to the rear window switch on an SY wire. The feed passes through the down switch contacts to the LH rear window motor on an SR wire. When the LH rear window switch is set in the up position, the contacts complete the earth path for the LH rear window motor. The earth path from the LH rear window motor is connected to the LH rear window switch on an SO wire. The earth continues through the up switch contacts and is connected via splice joint A358 to the window lift isolation switch on an SG wire. The earth is connected from the closed contacts of the window lift isolation switch on a B wire to earth header C0552. RH rear window switch - down Operation of the RH rear window switch in the down position, allows the feed from the rear window lift relay to pass through the up contacts of the RH window console switch on an SY wire to the RH rear window switch. The feed passes through the up switch contacts and is connected to the RH rear window motor on an SO wire. When the RH rear window switch is set in the down position, the contacts complete the earth path for the LH rear window motor. The earth path from the RH rear window motor is connected to the RH rear window switch on an SR wire. The earth continues through the switch down contacts and is connected via splice joint A358 to the window lift isolation switch on an SG wire. The earth is connected from the closed contacts of the window lift isolation switch on a B wire to earth header C0552. RH rear window switch - up Operation of the RH rear window switch in the up position, allows the feed from the rear window lift relay to pass through the down contacts of the RH window console switch on an SN wire to connector interface C0650-3/C0804-3. From this interface the feed continues on an SW wire to the rear window switch. The feed passes through the down switch contacts to the RH rear window motor on an SR wire. When the RH rear window switch is set in the up position, the contacts complete the earth path for the RH rear window motor. The earth path from the RH rear window motor is connected to the RH rear window switch on an SO wire. The earth continues through the up switch contacts and is connected via splice joint A358 to the window lift isolation switch on an SG wire. The earth is connected from the closed contacts of the window lift isolation switch on a B wire to earth header C0552.
DESCRIPTION AND OPERATION 4.18DISCOVERY SERIES II Window lift isolation switch If the window lift isolation switch is latched out, the earth path from the LH and RH rear window switches is broken, preventing operation of the LH and RH rear window switches. Rear window operation using the console switches is not affected by the isolation switch. When the window lift isolation switch is latched out, the removal of the earth path also breaks the earth path for the LH and RH rear window switch illumination. Refer to interior illumination - Description and Operation in this manual for switch illumination circuit description.
DESCRIPTION AND OPERATION DISCOVERY SERIES II 4.19 SUNROOF DESCRIPTION Sunroof Description Electric sunroofs are fitted at the front and rear of the vehicle. Both sunroofs are electrically operated. Switches on the front overhead console control operation of the front and rear sunroofs. The rear sunroof can be operated by a switch located in the rear overhead console. The switch is only operative when not disabled by the rear sunroof isolation switch located in the front overhead console. OPERATION Sunroof Supply Circuit supply A feed from the battery positive terminal is connected on an R wire to the engine compartment fusebox where it passes through fusible links 1, 6 and 8. Fusible links 1 and 6 are connected in series. The feed from fusible links 1 and 6 is connected on an NU wire to the passenger compartment fusebox where it passes through fuse 12. The feed is connected from fuse 12 to supply a continuous battery feed on an NR wire to the sunroof ECU pin C0785-3. The feed from fusible link 8 is connected on an NW wire to the passenger compartment fusebox and from the fusebox to the ignition switch on an N wire. Ignition switch supply With the ignition switch in position II, the feed from fusible link 8 passes through the ignition switch to the passenger compartment fusebox on a Y wire, where it passes through fuse 29. The feed is connected from fuse 29 to the Body Control Unit (BCU) pin C0660-1 on a GU wire. Sunroof Operation Front sunroof operation When the ignition switch is in position II, an enable input is sent from the BCU pin C0661-9 on a WG wire to pin C0785-10 on the sunroof ECU. When the enable input is present the power feed from pin C0785-3 is made available by the logic circuits in the sunroof ECU. The sunroof ECU is earthed from pin C0785-2 on a B wire via splice joints A14 and A15 to earth header C0018.