LR3/Disco 3
receive an unlock request from the remote handset, within 12 seconds.
If the personal button on the remote handset is configured to panic alarm, when the button is pressed the CJB
triggers the alarm as detailed above. The panic alarm operates with the anti-theft alarm system either armed or
disarmed. The CJB cancels the panic alarm when it receives a lock or unlock request from the remote handset, or
detects a valid key in the ignition switch. On North American Specification (NAS) vehicles, after 160 seconds the
panic alarm times out and the anti-theft alarm system returns to the previous operating state.
Door key lock signals are ignored after the alarm is triggered.
The alarm stops immediately and the anti-theft alarm system is disarmed on receipt of an unlock command from the
remote handset.
The alarm stops immediately and the anti-theft alarm system returns to the armed mode on receipt of a lock command
from the remote handset. The CJB ignores the current alarm trigger(s) and only considers the remainder of the alarm
trigger sources as valid inputs for a further alarm. The ignored alarm trigger(s) are reinstated as valid alarm trigger
sources after they remain in an untriggered state for a minimum of 1 second. For example, the anti-theft alarm system is
armed in the volumetric mode when a door is opened and triggers the alarm. Pressing the lock button on the remote
handset returns the anti-theft alarm system to the alarm mode and causes the CJB to ignore the inputs from the ajar
switch of the open door and the volumetric sensor. One second after the door closes, the CJB considers the ajar switch
input as valid again. After a further 30 seconds settling time, the CJB also considers the volumetric sensor input as valid
again.
The CJB stores the last ten alarm triggers in a trigger log, which can be accessed over the medium speed CAN bus using
T4. The trigger log can only be cleared when the system is disarmed. Each trigger entry contains a number that
corresponds to the trigger source.
Alarm Trigger Sources
If an alarm is triggered during an armed cycle, when the anti-theft alarm system is subsequently disarmed the CJB pulses
the hazard flashers at 200 milliseconds on, 200 milliseconds off, for 3 seconds.
Delivery Mode
When the vehicle is in the delivery mode, the anti-theft alarm system is disabled.
Diagnostics
The CJB monitors the communication links with the BBUS, the tilt sensor and the volumetric sensor. If any of the
communications links fail, the CJB stores a related fault code, which can be accessed with T4.
Diagnostic Fault Codes
Trigger No.
Description
0
No trigger stored
1
Driver door ajar switch
2
Front passenger door ajar switch
3
Rear LH door ajar switch
4
Rear RH door ajar switch
5
Tailgate ajar switch
6
Hood ajar switch
7
Ignition switch
8
External key lock turned to unlock
9
Tilt sensor
10
Volumetric sensor
Fault
Description
