Land Rover Range Rover Electrical Library Lm 2nd Edition Rover Manual

DESCRIPTION AND OPERATION
4.26RANGE ROVER
RH Front Seat
Horizontal Movement
A single seat motor controls horizontal movement of the RH front seat. To move the seat 
forwards and backwards, the RH seat switch pack (C0774) provides feeds to the forward/
backward seat motor (C0721) on GY and BY wires.
Vertical Movement
Two seat motors are used to control vertical movement of the RH front seat; one for the front 
of the seat, and one for the rear. To move the front of the seat up and down, the RH seat...

DESCRIPTION AND OPERATION
RANGE ROVER 4.27
Memory Drivers Seat
When the memory function is selected, the seat memory ECU (C0722) transmits the 
relevant data along the K-bus to the Body Control Unit (BCU) (C0660) on a WRY wire. The 
BCU then moves both the steering column and the door mirrors to the required position. For 
more information on door mirror operation, refer to the  Door Mirrors  section of this manual.
 
+  DOOR MIRRORS. 
For more information on steering column operation, refer to the...

DESCRIPTION AND OPERATION
4.28RANGE ROVER
FRONT HEATED SEATS
DESCRIPTION
General
Operation of the front electric seats is controlled by the Automatic Temperature Control 
(ATC) ECU via the two centre console mounted switches. Pressing the relevant seat heat 
switch once will heat the seat to a temperature of 44 °C (111 °F) and illuminate two LEDs 
on the switch face. Pressing the seat heat switch a second time will lower the temperature 
to 39 °C (102 °F) and illuminate one LED on the switch face....

DESCRIPTION AND OPERATION
RANGE ROVER 4.29
REAR HEATED SEATS
DESCRIPTION
General
Operation of the rear electric seats is controlled by the two seat heat switches located on the 
rear face of the centre console. Pressing the relevant seat heat switch once will heat the seat 
to a temperature of 44 °C (111 °F) and illuminate two LEDs on the switch face. Pressing the 
seat heat switch a second time will lower the temperature to 39 °C (102 °F) and illuminate 
one LED on the switch face. Pressing the switch a...

DESCRIPTION AND OPERATION
4.30RANGE ROVER
DIAGNOSTIC SOCKET
DESCRIPTION
General
The diagnostic socket is located behind an access panel on the drivers side of the fascia. 
The socket is constructed to SAE directive J1962 standard and allows attachment of 
TestBook or T4. The diagnostic socket allows detailed fault diagnosis checks to be carried 
out on the vehicle via an ISO 9141 K Line Bus and the Diagnostic DS2 Bus.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is...

DESCRIPTION AND OPERATION
RANGE ROVER 4.31
STARTING AND CHARGING – Td6
DESCRIPTION
Starting
The starting system on the vehicle comprises a 12 V 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.
Range Rover features lazy starting. This entails the driver not having to hold the ignition key 
in the crank...

DESCRIPTION AND OPERATION
4.32RANGE ROVER
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to the fuse holder (C1875) on an 
R wire. A constant battery feed is also supplied to fusible link 2 and fuse 53 of the passenger 
compartment fuse box (C0632) on an R wire. 
The 100A fuse located in the fuse holder (C1875) provides a constant battery feed to the 
glow plug timer (C0189) on an R wire. A second 100A fuse in the fuse holder (C1875) 
provides a constant battery...

DESCRIPTION AND OPERATION
RANGE ROVER 4.33
Glow Plug Timer
The glow plug timer receives a constant battery feed from the 100A fuse located in the fuse 
holder (C1875) on an R wire, and a second feed from the energised ECM relay (C1895) via 
fuse 2 of the engine compartment fuse box (C0570) on an R then RW wire.
When all starting parameters have been met, the ECM (C0606) provides a control feed to 
the glow plug timer (C0190) on a BR wire. The glow plug timer (C0190) will now power the 
glow plugs as...

DESCRIPTION AND OPERATION
4.34RANGE ROVER
Charging
The battery (C1641) provides a permanent feed to the alternator (C0183) via the starter 
motor (C0178) on an R wire. Fuse 5 of the passenger compartment fuse box (C0587) 
provides an ignition feed to the alternator (C0053) on a GW wire. 
When the engine is cranked, the alternator (C0053) supplies the ECM (C0606) a Pulse 
Width Modulated (PWM) signal on a U wire. The ECM uses this PWM signal to calculate the 
electrical load on the alternator, and...

DESCRIPTION AND OPERATION
RANGE ROVER 4.35
STARTING AND CHARGING – V8
DESCRIPTION
Starting
The starting system on the vehicle comprises a 12 V 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.
Range Rover features lazy starting. This entails the driver not having to hold the ignition key 
in the crank...