Discovery electrical Manual - part 75

 

  Index      Land Rover     DISCOVERY ELECTRICAL TROUBLESHOOTING MANUAL 1997-1999 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  73  74  75  76   ..

 

 

Discovery electrical Manual - part 75

 

 

THEFT ALARM SYSTEM (EXCEPT NAS)

T1

CIRCUIT OPERATION

6

BUILT IN TEST PROCEDURE

The handset should be detached from the key ring to
allow perimetric testing. The system will
automatically switch to volumetric testing if the
handset is in close proximity to the Ignition Switch
(X134).

The built in test procedure is accessed as follows:

1. Starting conditions: ignition off, doors unlocked,

alarm disarmed, bonnet switch depressed.

2. Carry out instructions 3 to 7 within 5 seconds.

3. Release bonnet switch.

4. Switch ignition on.

5. Open driver’s door.

6. Switch ignition off.

7. Switch ignition on.

If alarm is correctly accessed, the alarm sounder will
sound briefly and the Theft Alarm LED and hazard
lamps will flash. The following checks can then be
made:

Perimetric Testing

1. Open and close driver’s door or tailgate – Theft

Alarm LED and Hazard lamps will flash.

2. Depress and release bonnet switch – Theft

Alarm LED and Hazard lamps will flash.

3. Pull the driver’s door sill button up – Theft alarm

LED and Hazard lamps will flash.

4. Turn driver’s door key lock cylinder – Theft Alarm

LED and Hazard lamps will flash.

Volumetric Testing

1. Press the unlock button on the handset or move

the handset close to the Ignition Switch (X134) to
disable perimetric testing and enable volumetric
testing.

2. Any movement within the vehicle will be detected

by the Alarm Sensor (X213) and indicated by
flashing the Theft Alarm LED and hazard lamps.

3. Turn off ignition to end test procedure.

HANDSET INITIALISATION

The Theft Alarm Unit (Z163) must be programmed
whenever handsets are replaced. The serial
communications line is used to activate the “learn
mode” of the Theft Alarm Unit (Z163). Then the
handset(s) to be initialised must be made to transmit
their coded data to the Theft Alarm Unit (Z163).

NOTE: All handset(s) must be programmed during
the same learn mode period. It is not possible to

simply add a handset to the Theft Alarm Unit (Z163)
which has been programmed to other handsets.

When the “learn mode” of the Theft Alarm Unit
(Z163) has been accessed, the handset(s) are
programmed using the following procedure:

1. Starting conditions: Theft Alarm disarmed and

vehicle mobilised.

2. Press the handset unlock button a minimum of 8

times.

3. If the handset has been correctly programmed,

the horn will sound briefly and the hazard lamps
will flash once.

4. The next handset, up to a maximum of 4, can

now be programmed using the same procedure.

NOTE: It is very important that each handset is
programmed separately. If the Theft Alarm Unit
(Z163) receives key presses from two handsets,
then neither handset will be programmed.

The “learn mode” is terminated using the serial
communications line. If the Theft Alarm Unit (Z163)
would not accept reprogramming, the original
handset(s) will still function.

THEFT ALARM SYSTEM (EXCEPT NAS)

T1

7

CIRCUIT DIAGRAM

MFI–V8

S204

30

F 1

15 A

E200

15

F 5

10 A

P127
Satellite Fuse
Box 1

Z163
Theft Alarm Unit

P

25

GK

10

C225

HJ3

17

BO

S2033

GK

30

F 4

30 A

P125
Engine Compart-
ment Fuse Box

PN

8

C274

S2089

11

C274

8

C2083

8

C217

S2107

S2017

B

1

C101

KB

X318
Data Link Con-
nector (OBDII)

See Ground Dis-
tribution

See Fuse Details

See Fuse Details

C225

HJ4

See Fuse Details

Z132
Engine Control
Module (ECM)

31

C243

LGP

Z276
Diesel Immobi-
lisation Unit
(DDS)

1

C1040

B

300Tdi with EDC

300Tdi with EGR

MFI–T16
300Tdi without
EGR

Not used

THEFT ALARM SYSTEM (EXCEPT NAS)

T1

8

CIRCUIT DIAGRAM

26

Z270
Passive Immobi-
lisation Coil

S332

Z163
Theft Alarm Unit

3

3

X213
Alarm Sensor

WB

20

20

1

BN

21

C225

C277

C335

2

C335

B

E401

12

PK

7

R

2

C2096

C274

SR

R

1

C2096

WB

C225

Antenna

See Ground Dis-
tribution

Shield

13

SCR

THEFT ALARM SYSTEM (EXCEPT NAS)

T1

9

CIRCUIT DIAGRAM

Z163
Theft Alarm Unit

7

YK

[1]

[2]

M114
Left Front Door
Lock Actuator

[1]

Lock

[2]

Unlock

See Ground Dis-
tribution

5

4

C507

B

3

C507

B

S501

E201

Not used

6

C2101

X212
Alarm Bonnet
Switch

[1]

Open

X201
Left Front Door
Key Switch

[1]

Key turned

[2]

Key out

See Ground Dis-
tribution

See Ground Dis-
tribution

8

9

3

1

C2101

C504

4

C504

S501

1

C178

2

C178

E200

B

B

PO

UG

B

S204

[2]

[1]

0

[1]

E201

YN

HJ3

C225

 

 

 

 

 

 

 

Content   ..  73  74  75  76   ..