Discovery electrical Manual — part 73
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TRAILER AUXILIARY SOCKET
P1
5
CIRCUIT DIAGRAM
S288
15
F 1
15 A
0
[1]
E201
See Fuse Details
10
C204
3
C267
30
F 4
30 A
1
C101
GO
P126
Fascia Fuse Box
P125
Engine Compart-
ment Fuse Box
LGP
5
C215
14
C204
L
Z128
Flasher Unit
W/L
3
C206
B
See Ground Dis-
tribution
15
C204
LGN
Z148
Multi–Function
Unit (MFU)
Z148
Multi–Function
Unit (MFU)
P126
Fascia Fuse Box
1
C254
P126
Fascia Fuse Box
X220
Hazard Switch
2
C267
1
B
+
–
C
A
P1-6
14
C209
1
C215
PN
HJ11
See Fuse Details
S2089
S2042
HJ1
LGU
Z142
Instrument
Cluster
6
S253
1
C221
HJ8
31
B
E201
See Ground Dis-
tribution
C207
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TRAILER AUXILIARY SOCKET
P1
6
CIRCUIT DIAGRAM
S243
20
C215
P1-5
0
[1]
0
[1]
9
7
X220
Hazard Switch
LGN
6
A
2
C2009
[1]
[2]
0
C
P1-7
1
GR
B
P1-7
4
GW
X116
Direction Indica-
tor Switch
[1]
Left
[2]
Right
C2009
GW
GR
Z213
Direction Indica-
tor Diode 2
Z212
Direction Indi-
cator Diode 1
G
G
C208
18
P126
Fascia Fuse Box
Z148
Multi–Function
Unit (MFU)
C267
C267
Direction Indica-
tor Lamps
S239
S241
Direction Indica-
tor Lamps
1
GW
C211
3
GR
L
K
C208
17
C204
3
5
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TRAILER AUXILIARY SOCKET
P1
7
CIRCUIT DIAGRAM
GR
S432
GW
S405
3
C400
4
Right Direction
Indicator Lamps
Left Direction
Indicator Lamps
X172
Trailer Auxiliary
Socket
Direction Indica-
tor Lamps
17
C277
11
P1-6
B
P1-6
C
THEFT ALARM SYSTEM (EXCEPT NAS)
T1
CIRCUIT OPERATION
1
CIRCUIT OPERATION
For 1996 models a vehicle alarm system is available
as original equipment. Three different functions are
integrated into the Theft Alarm System:
1. The main function of the system is to offer
easy–to–use remote locking and unlocking of the
vehicle (Central Locking).
2. Anti–Theft System function.
3. Engine Immobilisation function.
NOTE: The Theft Alarm ECU (Z163) is fully
programmable to meet different market
requirements; therefore some of the features listed
will vary dependent on vehicle model or territory.
ALARM COMPONENTS
1. Theft Alarm Unit (Z163)
2. Handset Transmitter
3. Passive Immobilisation Coil (Z270) (Not on all
vehicles!)
4. Alarm Sensor (X213) (Not on all vehicles!)
5. Lock Actuators (M114, M122, M117, M125,
M132)
6. Alarm Bonnet Switch (X212) (Not on all
vehicles!)
7. Right Front Door Key Switch (X202)
8. Door Switches (X150, X118, X142, X163)
9. Rear End Door Switch (X265)
10. Direction Indicator Lamps (Hazard Lamps)
11. Battery Backed Up Alarm Sounder (Z272) (Not
on all vehicles!)
12. Alarm Sounder (Z171) and Sounder Relay
(K160) (Not on all vehicles!)
13. Theft Alarm LED and Engine Immobilised
Warning Lamp (EIWL) (Included in the
Instrument Cluster (Z142))
14. Engine Immobilisation Control Unit (Z171)
MFI–V8 and 300 Tdi without EDC Engines only
(Not on all vehicles!)
Central Locking FUNCTION
Central Locking is controlled by the Theft Alarm Unit
(Z163) and may be locked by using the driver’s door
key, sill button(s) or handset. The vehicle may be
unlocked by using the handset or EKA code.
NOTE: The central door locking system will shut
down for a period of approximately 15 seconds if the
Theft Alarm Unit (Z163) determines that the Lock
Actuators could be overheating.
ANTI–THeft System Function
The alarm system offers the following forms of
protection:
Perimetric protection against unauthorised
opening of all doors, tailgate, and bonnet.
Engine crank inhibit against unauthorised engine
crank.
Electronic engine immobilisation against
unauthorised engine start.
Volumetric protection against intrusion into the
passenger compartment.
NOTE: Perimetric protection is also triggered by the
driver’s door sill switch being lifted and the ignition
switch being turned on.
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