Land Rover Discovery Lhd Models Etm 1995 4th Edition Exp Rover Manual

THEFT ALARM SYSTEM 
1
ETM T1
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUAL
CIRCUIT OPERATION
For 1995 models a vehicle alarm system is
available as original equipment. The main function
of the system is to offer easy±to±use remote
locking and unlocking of the vehicle without having
to actively select the alarm function.
ALARM COMPONENTS
4. Theft Alarm Unit (Z163) and Theft Alarm Relay
(K159)
5. Alarm Bonnet Switch (X212)
6. Tailgate Switch (X170)
7. Horns (K128, K134) and Horn Relay (K189)
8. Theft Alarm...

THEFT ALARM SYSTEM
2
T1 ETM
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUA L
Vehicle Status Indication
Vehicle status is indicated by up to three devices:
(a) Alarm Sounder (Z171), (b) hazard lights, (c)
Theft Alarm LED (B151). When the vehicle arms in
either mode, the hazard lights will flash three times
and the LED will flash rapidly for 10 seconds. LED
will then flash at a slower rate while vehicle is
armed. When the vehicle disarms, hazard lights will
flash once and LED will extinguish. If LED remains...

THEFT ALARM SYSTEM 
3
ETM T1
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUAL
Partially armed mode
If a door, tailgate or bonnet is left open when the
system is armed, the LED will not light for 10
seconds indicating a mislock condition. Hazard
lights will not flash. If an open door or tailgate is
causing the mislock, the starter motor is disabled.
The alarm will sound if ignition is turned to start
position. If an open bonnet is causing the mislock,
the starter motor is disabled. The alarm will arm the...

THEFT ALARM SYSTEM
4
T1 ETM
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUA L
BUILT IN TEST PROCEDURE
The built in test procedure is accessed as follows:
1. Starting conditions: ignition off, doors unlocked,
bonnet switch depressed.
2. Carry out instructions 3 to 7 within 8 seconds.
3. Release bonnet switch.
4. Switch ignition ON.
5. Lock doors.
6. Switch ignition OFF.
7. Switch ignition ON.
If alarm is correctly accessed, horn will sound and
LED will flash. The following checks can be made:
8. Open and close...

ELECTRICAL TROUBLESHOOTING MANUAL
ETM T1
Theft Alarm System
5
DISCOVERY
S2032
30
F 1
15 A
E200
15
F 5
10 A
S2017P127
Satellite Fuse
Box 1
Z163
Theft Alarm Unit
1.0 P
See Fuse Details
See Ground Dis-
tribution Except NAS NAS
S2033
1.0 P
6 C2741.0 GK
HJ2
0.5 GK
10
2 C274
HJ30.5 BO
C225
J188
Antenna 

ELECTRICAL TROUBLESHOOTING MANUA L
T1 ETM
Theft Alarm System
6
DISCOVERY



  

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C274 45
1.0 O 1.0 K
1.0 O0.5 O
2 C306
0.5 O
S314
0.5 O1.0 O
8 C602
0.5 O1.0 O
8 C502
1 C507
2 C5079 C502 1.0 K
1.0 K
9 C602
0.5 K
2 C607
1 C6070.5 K
3 C306
0.5 K
S315
2 C701
2 C706
1 C706
1 C701
1 C801
1 C806
2 C806
2 C8010.5 K
1.0 K
S2007 S2072S2073 S2009
0.5...

ELECTRICAL TROUBLESHOOTING MANUAL
ETM T1
Theft Alarm System
7
DISCOVERY
T1-6
M132
Tailgate Lock
Actuator
AB
2 1 C414 1.0 O 1.0 K6 4 C415 1.0 O 1.0 K5 6 C277 1.0 O 1.0 K
OK
M 

ELECTRICAL TROUBLESHOOTING MANUA L
T1 ETM
Theft Alarm System
8
DISCOVERY
[1][2]
M114
Left Front Door
Lock Actuator
[1] Lock
[2] UnlockZ163
Theft Alarm Unit
See Ground Dis-
tributionC225 62
0.5 YK
0.5 GB
5 4 C507
0.3 B
3 C507
0.5 B
S501
E201
6 C502
Not used6 C602
Not used 

ELECTRICAL TROUBLESHOOTING MANUAL
ETM T1
Theft Alarm System
9
DISCOVERY
Z163
Theft Alarm Unit
Z148
Multi±Function
Unit (MFU)
X212
Alarm Bonnet
Switch
[1] Open X201
Left Front Door
Key Switch
[1] Key turned
[2] Key out
See Ground Dis-
tributionSee Ground Dis-
tribution 371 12 C225
3 C602
S5014 C504 1 C1782 C1784 C205
0.5 UG
3 C502
1 C504
0.5 B
E201E200 0.5 BB 0.5 PO 0.5 PU 0.5 KB
S204 [2] [1]
0[1]
HJ3
Not used 

ELECTRICAL TROUBLESHOOTING MANUA L
T1 ETM
Theft Alarm System
10
DISCOVERY
30
F 6
20 A
See Fuse Details
P128
Satellite Fuse
Box 2
B151
Theft Alarm LED
Z163
Theft Alarm Unit 14 C2254 C209 0.5 RW2 C269 1 C269 0.5 P S2061Z163
Theft Alarm Unit
0.5 WB80.5 BN15 C225
1615 C277
X213
Alarm Sensor
31 C483
0.5 B2 C483
E401
See Ground Dis-
tribution