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

							Electrical Library
NRRERL  28/11/01  10:02 am  Page 1 
						

							 
ELECTRICAL LIBRARY
LR L 0 453E NG(2)
Published by Land Rover © La nd  Rove r 20 02
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form, el ectronic, mechanical, 
recording or other means without prior written permission from Land Rover. 
						

							CONTENTS
RANGE ROVER 1
INTRODUCTION .............................................................................  1
ABOUT THIS DOCUMENT  ............................................................................... 1.1
ELECTRICAL PRECAUTIONS  ......................................................................... 1.3
ABBREVIATIONS ............................................................................................. 1.6
HOW TO USE THIS DOCUMENT  .................................................................... 1.8
FAULT DIAGNOSIS  ........................................................................................ 1.10
WIRE COLOUR CODES  ................................................................................. 1.11
FUSE DETAILS  ...............................................................................  2
ENGINE COMPARTMENT FUSE BOX  ............................................................ 2.2
PASSENGER COMPARTMENT FUSE BOX  .................................................... 2.3
REAR FUSE BOX  ............................................................................................. 2.6
EARTH POINTS AND HEADERS  ...................................................  3
DESCRIPTION AND OPERATION  .................................................  4
ANTI-THEFT ALARM AND CENTRAL DOOR LOCKING (CDL)  ...................... 4.1
ENGINE IMMOBILISATION  .............................................................................. 4.9
WINDOWS ...................................................................................................... 4.13
SUNROOF ...................................................................................................... 4.17
DOOR MIRRORS  ............................................................................................ 4.19
INTERIOR MIRROR ........................................................................................ 4.23
FRONT SEATS  ............................................................................................... 4.25
FRONT HEATED SEATS  ................................................................................ 4.28
REAR HEATED SEATS  .................................................................................. 4.29
DIAGNOSTIC SOCKET  .................................................................................. 4.30
STARTING AND CHARGING – Td6  ............................................................... 4.31
STARTING AND CHARGING – V8  ................................................................. 4.35
CRUISE CONTROL  ........................................................................................ 4.38
ELECTRONIC AUTOMATIC TRANSMISSION (EAT) – GM5 ......................... 4.40
ELECTRONIC AUTOMATIC TRANSMISSION  (EAT) – ZF  ........................... 4.43
ANTI-LOCK BRAKING SYSTEM (ABS)  .......................................................... 4.46
SUPPLEMENTARY RESTRAINT SYSTEM (SRS)  ......................................... 4.49
AUTOMATIC TEMPERATURE CONTROL (ATC)  .......................................... 4.53
AUTOMATIC TEMPERATURE CONTROL (ATC) – COMFORT  .................... 4.56
FUEL BURNING HEATER – Td6  .................................................................... 4.61
FUEL BURNING HEATER – V8  ...................................................................... 4.62
COOLING FAN  ................................................................................................ 4.64
HEATED REAR WINDOW (HRW)  .................................................................. 4.66 
						

							CONTENTS
2RANGE ROVER
HEATED FRONT SCREEN (HFS)  .................................................................. 4.67
WIPERS AND WASHERS  .............................................................................. 4.68
HEADLAMP WASH/WIPE  ............................................................................... 4.71
BRAKE AND REVERSE LAMPS  .................................................................... 4.72
HEAD, SIDE AND TAIL LAMPS ...................................................................... 4.74
AUTOMATIC HEADLAMP LEVELLING  .......................................................... 4.78
FOG LAMPS  ................................................................................................... 4.80
DIRECTION INDICATOR/HAZARD WARNING LAMPS ................................. 4.82
INTERIOR LAMPS  .......................................................................................... 4.84
INTERIOR ILLUMINATION  ............................................................................. 4.87
INSTRUMENTS .............................................................................................. 4.90
HORNS ........................................................................................................... 4.92
CLOCK ............................................................................................................ 4.93
CIGAR LIGHTERS  .......................................................................................... 4.94
ACCESSORY SOCKETS ................................................................................ 4.95
TRAILER SOCKET  ......................................................................................... 4.96
AUDIO SYSTEM – LOW LINE  ........................................................................ 4.98
AUDIO SYSTEM – MID-LINE  ......................................................................... 4.99
AUDIO SYSTEM – HIGH LINE  ..................................................................... 4.100
SATELLITE NAVIGATION SYSTEM  ............................................................ 4.101
SATELLITE NAVIGATION SYSTEM – NAS  ................................................. 4.102
TELEPHONE ................................................................................................. 4.103
TELEPHONE – HANDS FREE  ......................................................................4.104
TELEPHONE – NAS  ......................................................................................4.105
FUEL PUMP  ...................................................................................................4.106
ROTARY COUPLER  ......................................................................................4.108
PARK DISTANCE CONTROL (PDC)  .............................................................4.110
TYRE PRESSURE MONITORING (TPM)  ......................................................4.113
STEERING COLUMN  .................................................................................... 4114
AIR SUSPENSION  ........................................................................................ 4.117
CONNECTOR ..................................................................................  5
CIRCUIT REFERENCE NUMBERS  .................................................................. 5.1 
						

							INTRODUCTION
RANGE ROVER 1.1
INTRODUCTIONABOUT THIS DOCUMENT
General
This document is intended to assist in diagnosing electrical faults, and should be used in 
conjunction with the Electrical Circuit Diagrams. The document is divided into the following 
sections.
1.INTRODUCTION  – Includes Electrical Precautions, a list of Abbreviations and 
general information on how to use this document.
2.FUSE DETAILS  – Provides details of location, rating in Amperes, and circuit(s) 
protected.
3.EARTH POINTS AND HEADERS – Provides details of earth points and earth 
headers, including a plan view of the vehicle to aid location.
4.DESCRIPTION AND OPERATION – Provides an explanation of how each of the 
systems operate.
5.CIRCUIT REFERENCE NUMBERS – Provides a list of circuit reference numbers 
against a model or feature to which they apply.
6.CONNECTOR DETAIL  – Details of connectors including a location photograph, face 
view and pin-out table.
NOTE: Before starting electrical checks on the vehicle, ensure that relevant mechanical 
functions operate satisfactorily.
References
References to the LH or RH side given in this document are made when viewing the vehicle 
from the rear.
Operations covered in this document do not include reference to testing the vehicle after 
repair. It is essential that work is inspected and tested after completion and, if necessary, a 
road test of the vehicle is undertaken, particularly where safety related items are concerned.
CAUTION: Before undertaking any electrical work on a vehicle ALWAYS read the 
ELECTRICAL PRECAUTIONS. 
						

							INTRODUCTION
1.2RANGE ROVER
Battery Voltage
Open Circuit Voltage Test
Before commencing diagnosis of electrical problems, verify the condition of the battery is 
acceptable by using the open circuit voltage test.
1. Switch off all electrical loads on the vehicle.
2. Adjust digital multimeter to read dc volts on the appropriate scale.
3. Connect test probes across battery terminals ensuring that polarity is correct and 
record the voltage displayed.
A reading of 12.5 V or more is acceptable; any battery which reads less than this will 
need charging.
NOTE: If the vehicle has been used within a period of 8 hours prior to the test, surface 
charge must be removed from the battery by switching the headlamps on for approximately 
30 seconds. Wait a further 60 seconds before checking the open circuit voltage.
Battery voltage is used as a known reference for ascertaining whether or not circuits are 
receiving sufficiently high voltage for components to function correctly. This reference is only 
a guide since most electronic circuits are designed to function over a wide range of voltages. 
In addition, consideration must be given to readings affected by voltage drop across certain 
components and fluctuations due to cable lengths. 
						

							INTRODUCTION
RANGE ROVER 1.3
ELECTRICAL PRECAUTIONS
General
The following guidelines are intended to ensure the safety of the operator whilst preventing 
damage to the electrical and electronic components fitted to the vehicle. Where necessary, 
specific precautions are detailed in the relevant sections of this document, reference to 
these precautions should be made prior to commencing repair operations.
Equipment – Prior to commencing any test procedure on the vehicle, ensure that the 
relevant test equipment is working correctly and any harnesses or connections are in good 
condition. This particularly applies to mains lead or connections.
WARNING: Before commencing work on an ignition system, all high tension 
terminals, adaptors and diagnostic equipment for testing should be inspected to 
ensure that they are adequately insulated and shielded to prevent accidental personal 
contact and to minimise the risk of shock. Wearers of surgically implanted pacemaker 
devices should not work in close proximity to ignition circuits or diagnostic 
equipment.
Polarity – Never reverse connect the vehicle battery and always observe correct polarity 
when connecting test equipment.
High Voltage Circuits – Whenever disconnecting live ht circuits, always use insulated pliers 
and never allow the open end of the ht lead to come into contact with other components, 
particularly ECUs. Since high voltage spikes can occur on the terminals of the coil while the 
engine is running, exercise caution when measuring the voltage at these points.
WARNING: The Xenon headlamp system generates up to 28,000 V and contact with 
this voltage could lead to fatality. Make sure that the headlamps are switched off 
before working on the system. Refer to the guidelines given in the General 
Information section of the Service Repair Procedures Workshop Manual before any 
work is carried out.
Connectors and Harnesses – The engine compartment of a vehicle is a particularly hostile 
environment for electrical components and connectors. Always ensure these items are dry 
and oil free before disconnecting and connecting test equipment. Never force connectors 
apart either by using tools or by pulling on the wiring harness. Always ensure locking tabs 
are disengaged before removal and note orientation to enable correct reconnection. Ensure 
that any protective covers and substances are replaced if disturbed. 
						

							INTRODUCTION
1.4RANGE ROVER
Before removing a faulty component, refer to the Workshop Manual for removal procedures. 
Ensure the ignition switch is turned to the OFF position, the battery is disconnected (see 
Battery Disconnecting) and any disconnected harnesses are supported to avoid any 
undue strain at the terminals. When replacing the component keep oily hands away from 
electrical connection areas and push connectors home until any locking tabs fully engage.
Battery Disconnecting
It is imperative that the key is removed from the ignition switch before disconnecting the 
battery. A time of 2 minutes must also elapse (after the ignition has been switched off) before 
the battery should be disconnected. Failure to do so could result in:

Navigation computer software damage

Incorrect fuel gauge reading.
Before disconnecting the battery, disable the alarm system and switch off all electrical 
equipment. If the radio is to be serviced, ensure the security code has been deactivated.
CAUTION: Never disconnect the battery with the ignition switched on.
CAUTION: To prevent damage to the navigation computer software, a waiting period 
of two minutes must elapse after the ignition is switched off before the battery leads 
are disconnected.
CAUTION: To prevent damage to electrical components, always disconnect the 
battery when working on the vehicles electrical system. The earth lead must be 
disconnected first and reconnected last.
CAUTION: Always ensure that battery leads are routed correctly and are not close to 
any potential chafing points.
After reconnecting the battery, the steering wheel must be turned to full LH and RH lock (with 
the engine running). This allows the Dynamic Stability Control (DSC) system to relearn the 
steering wheel position. Failure to do so will result in a variety of instrument pack warning 
lamps being illuminated. 
						

							INTRODUCTION
RANGE ROVER 1.5
Battery Charging
Only recharge the battery with it removed from the vehicle. Always ensure any battery 
charging area is well ventilated and that every precaution is taken to avoid naked flames and 
sparks.
The New Range Rover is fitted with a lead calcium battery, and can only be charged using 
equipment specifically designed to operate on this type of battery. Refer to the Land Rover 
Equipment  bulletin for a list of recommended battery charging equipment.
Disciplines
Switch off ignition prior to making any connection or disconnection in the system as electrical 
surge caused by disconnecting live connections can damage electrical components.
Ensure hands and work surfaces are clean and free of grease, swarf, etc. as grease collects 
dirt which can cause tracking or high-resistance contacts.
When handling printed circuit boards, treat them as you would a disc – hold by the edges 
only; note that some electrical components are susceptible to body static.
Connectors should never be subjected to forced removal or refit, especially inter-board 
connectors. Damaged contacts will cause short-circuit and open-circuit conditions.
Prior to commencing testing, and periodically during testing, touch a good earth, i.e. cigar 
lighter socket, to discharge body static as some electrical components are vulnerable to 
static electricity.
Grease for Electrical Connectors
Some under bonnet and under body connectors are protected against corrosion by the 
application of a special grease during production. Should connectors of this type be 
disturbed, repaired, or replaced, a grease of this type, available under part number BAU 
5811, should again be applied. Do not apply grease to any connectors that do not have 
grease applied as standard.
NOTE: The use of other greases must be avoided as they can migrate into relays, switches, 
etc. contaminating the contacts and leading to intermittent operation or failure.