Land Rover Discovery 99my To 03my Electrical Library 3rd Edition Rover Manual

DESCRIPTION AND OPERATION
4.40DISCOVERY SERIES II
STARTING AND CHARGING - Td5
DESCRIPTION
General
The starting system comprises a starter motor and solenoid located at the rear right hand 
side of the engine. A starter relay, controlled by the Body Control Unit (BCU), supplies 
battery power for starter solenoid operation. The starter motor receives its feed directly from 
the battery.
The charging system comprises an alternator containing a rectifier pack and a regulator to 
maintain a constant direct...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.41
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 fuses 
24 and 27 in the fusebox.
With the ignition switch in the crank position III, the feed from fusible link 8 passes through 
the ignition switch to the passenger compartment fusebox on a WR wire, where it passes 
through fuse 23 in the fusebox....

DESCRIPTION AND OPERATION
4.42DISCOVERY SERIES II
Starter relay operation
When the ignition switch is moved to the crank position III, a feed passes from the switch, 
through fuse 23 in the passenger compartment fusebox to the coil of the starter relay in the 
engine compartment fusebox on a WR wire.
The coil is earthed to the BCU on a BO wire. When the BCU determines that starter 
operation is allowed, the earth path is completed and the starter relay energises, closing the 
relay contacts.
The feed...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.43
When the voltage applied to the alternator/generator side of the ignition/no charge warning 
lamp exceeds the battery voltage applied to the warning lamp, the lamp is extinguished. This 
shows that the alternator/generator is producing battery charging current.
When the battery is at a low state of charge or the current draw from the electrical functions 
of the vehicle causes a voltage drop, the alternator/ generator automatically charges at its...

DESCRIPTION AND OPERATION
4.44DISCOVERY SERIES II
STARTING AND CHARGING - V8
DESCRIPTION
General
The starting system comprises a starter motor and solenoid located at the rear right side of 
the engine. A starter relay, controlled by the Body Control Unit (BCU), supplies battery 
power for starter solenoid operation. The starter motor receives its feed directly from the 
battery.
The charging system comprises an alternator containing a rectifier pack and a regulator to 
maintain a constant direct current...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.45
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 27 
in the fusebox.
With the ignition switch in the crank position III, the feed from fusible link 8 passes through 
the ignition switch to the passenger compartment fusebox on a WR wire, where it passes 
through fuse 23 in the fusebox.
Starting...

DESCRIPTION AND OPERATION
4.46DISCOVERY SERIES II
The feed from the battery positive terminal passes through the closed contacts of the starter 
motor solenoid and operates the starter motor. The starter motor is earthed through the 
motor body attachment.
When the ignition switch is released, it returns to position II. This terminates the feed from 
the ignition switch to the starter relay coil, de-energising the coil and opening the relay 
contacts. This, in turn removes the feed from fusible link 12...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.47
ENGINE MANAGEMENT - Td5
DESCRIPTION
General
Refer to Workshop Manual for description and operation. 

DESCRIPTION AND OPERATION
4.48DISCOVERY SERIES II
ENGINE MANAGEMENT - V8
DESCRIPTION
General
Refer to Workshop Manual for description and operation. 

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.49
IGNITION AND SHIFT INTERLOCK (NAS/JAPAN ONLY)
DESCRIPTION
General
Shift interlock
When the transmission gear selector is in the PARK position and the ignition is in the OFF 
position 0, a shift interlock solenoid is de-energised, locking the transmission gear selector 
in the PARK position.
The transmission gear selector can only be moved from the PARK position when the ignition 
is on and the brake pedal is depressed. The brake pedal switch signals the...