Porsche 996 TT, Repair Manual

Page: 1216 / 2099

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Energy−saving mode active
In order to keep "breakdowns" resulting from an empty battery to a minimum, the radio receiver, which draws
a high closed−circuit current, is switched off in the alarm system control module after a certain time in
addition to switch−off of the other loads.
The radio receiver is switched off if the ignition is not switched on again within five days (120 h OFF
time).
•
The radio receiver is switched off independently of the locking condition of the vehicle. •
A locked vehicle can be unlocked with the vehicle key. (This does not reactivate the radio receiver). •
In order to avoid triggering the alarm, the vehicle key with valid transponder must be turned in the
steering lock within the vehicle−entering delay of 10 seconds (due to the "passive arming" function −
automatic arming of the alarm system 30 seconds after the vehicle is left with the ignition key
removed; the central locking system is not activated in this case). •
This also applies for the Belgian market, if the vehicle was parked unlocked for longer than five days. •
If the radio receiver has been deactivated, it can be reactivated only by switching on the ignition
again. •
The switch−off time is reset if the ignition is switched on within five days, i.e. the system does not
enter energy−saving mode. •
If a valid radio command is recognised within the idle period (terminal 15 off), the switch−off time is
not reset. •
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Fault in hand−held transmitter or vehicle
If the LED on the hand−held transmitter stays dark when the transmitter is operated, this is an
indication of either an empty battery or a faulty hand−held transmitter. •
Radio transmission is OK if the LED on the transmitter flashes when the transmitter is operated and
the alarm readiness lamp on the dashboard flashes rapidly.
•
Note
If the alarm readiness light stays dark and chapters 1 to 4 can be excluded, the problem is a system
fault of the vehicle! •
996420, 996421, 996450, 996451, 996620, 996621, 996650, 996651, 996840, 996841
einordnung
Atmospheric interference or interfering transmitters 1153