L322 Range Rover System Description and Operation
INSTRUMENTS
DESCRIPTION AND OPERATION
88-7
The following table shows the available warning lamps and indicates if they are subject to a bulb check illumination
and if they are self controlled or externally controlled.
Analogue Instruments
The analogue instruments are:
l
speedometer
l
tachometer
l
fuel level gauge
l
engine coolant temperature gauge.
Speedometer
The speedometer is an electrically driven, analogue instrument for displaying the vehicle speed. The pointer needle
is oil damped to prevent impacts on the vehicle wheels, causing deflection of the pointer needle.
The speedometer is driven by a square wave signal derived from the ABS ECU. The wheel speeds are measured by
sensors reading rotational speed from toothed targets on the hubs. These speeds are passed to the ABS ECU in the
form of pulsed signals. The ABS ECU is programmed that 48 pulses is equal to one revolution of the wheels and this
equates in distance to approximately 2 metres. The actual signal that drives the speedometer is a buffered signal sent
from the left hand rear speed sensor.
Warning Lamp
Illumination
Colour
Bulb Check
Self controlled
(S)/ Externally
controlled (E)
Gear selector lever 'P'
Green
No
E
Gear selector lever 'R'
Green
No
E
Gear selector lever 'N'
Green
No
E
Gear selector lever 'D'
Green
No
E
Gear selector lever '5'
Green
No
E
Gear selector lever '4'
Green
No
E
Gear selector lever '3'
Green
No
E
Gear selector lever '2'
Green
No
E
Gear selector lever '1'
Green
No
E
Transfer box low range
Green
No
E
Seat belt warning
Red
No
S/E
Brake assist warning
Amber
Yes
E
EBD warning
Red
Yes
E
General brake warning
Red
Yes
S
HDC
Green
Yes
E
Glow plug active
Amber
No
E
Low fuel level
Amber
Yes
S
Left direction indicator
Green
No
S/E
Right direction indicator
Green
No
S/E
Front fog lamps
Green
No
E
Rear fog lamps
Green
No
E
Headlamp main beam
Blue
No
E
Handbrake
Red
Yes
S
Battery charge indicator
Red
No
E
Dynamic stability control
Amber
Yes *
E
MIL / Service engine soon
Amber
No
E
Oil pressure
Red
No
E
ABS
Amber
Yes *
E
SRS
Red
No
E
Cruise control
Green
No
E
* = Bulb check performed by ECU, not instrument pack