Defender Electric Diagrams. Manual — part 175
FIBRE OPTICS
General
The fibre optic system installed uses Media Oriented Systems Transport (MOST), which is a multimedia
network, optimized for automotive applications. Its design allows it to provide a low-overhead and low-cost
interface for the simplest of devices, such as microphones and speakers. More intelligent devices can
automatically determine the features and functions provided by all other devices on the network and establish
sophisticated control mechanisms without distracting the driver.
Under normal installation conditions the system is robust and failures should not occur. However, since the
optical fibres convey data using infra-red light, it is vital the passage of light down the fibre is unobstructed.
Obstruction of infra-red light can be caused by:
z
Contamination of the fibre ends.
z
Damage to the fibre ends.
z
Bending, kinking or damaging the cable.
NOTE: Fibres damaged by kinking or exposure of the optical core due to abrasion must be replaced.
Handling
Take special care to avoid damage or contamination when handling or working in the vicinity of fibre optic
cables and connectors.
NOTE: Damage or contamination includes scratches to the cable ends and pollution caused by dust,
dirt, oil or moisture.
CAUTION: When handling fibre optic cables cleanliness is of paramount importance. The fibre ends
should not be touched even with clean bare hands as the natural oils deposited from the skin may
penetrate the fibre or may cause dirt to adhere to the fibre end.
System malfunctions and unnecessary warranty claims can be minimised by following these guidelines:
z
After disconnection of any cables, carefully install appropriate dust caps to protect the mating faces of
the connectors from damage or contamination.
z
Avoid introducing tight bends (less than 30mm radius) or kinks into the fibre optic cable during service
or repair. Tight bends or kinks could impair operation, cause immediate system failure, or future system
failure.
z
Avoid excessive force, strain or stress on the fibres and connectors, especially permanent stress after
reinstallation.
TABLE OF CIRCUIT OPTION CODES
The following table contains a list of circuit (Cct) reference numbers against a description of the applicable
model or option. This information should be used in conjunction with the connector pin-out tables to determine
the wire configuration of the vehicle under test.
Cct
Model or Option
1
ABS
2
ABS + TRACTION CONTROL
3
2 DOOR
4
3 DOOR
5
4 DOOR
6
4/5 DOOR
7
5 DOOR
8
HEAD/SIDE LAMPS +
HEADLAMP LEVEL
9
ABS LH
10
ABS RH
11
WINDOW LIFT DOORS
14
AIRCON
14L
AIRCON
14R
AIRCON
22
ANTI-THEFT ALARM
22L
ANTI-THEFT ALARM
22R
ANTI-THEFT ALARM
95L
WIPERS & WASHERS
95R
WIPERS & WASHERS
HEADLAMP LEVEL
107
(MANUAL)
107L
HEADLAMP LEVEL
(MANUAL)
107R
HEADLAMP LEVEL
(MANUAL)
109R
HEATED FRONT SCREEN
109L
HEATED FRONT SCREEN
139L
LHD VEHICLES
192
REAR SPEAKERS
200R
RHD VEHICLES
247L
WINDOW LIFT
247R
WINDOW LIFT
248
WINDOW LIFT FRONT
254
ENGINE MANAGEMENT
DIESEL
254R
ENGINE MANAGEMENT
DIESEL
254L
ENGINE MANAGEMENT
DIESEL
499
LEGACY ALL CCT
765R
DIM/DIP
766
COLD CLIMATE PACK
766R
COLD CLIMATE PACK
766L
COLD CLIMATE PACK
767L
CENTRAL DOOR LOCKING
767R
CENTRAL DOOR LOCKING
768L
ALARM/CENTRAL DOOR
LOCKING
768R
ALARM/CENTRAL DOOR
LOCKING
769
RADIO
769R
RADIO
769L
RADIO
770
90 PUMA ENGINE
771
110 PUMA ENGINE
772
130 PUMA ENGINE
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