Subaru 2002 Forester Owner's Manual page 98

B Disarming the system
To disarm the system, briefly press the "UNLOCK/DISARM" button on
the transmitter.
B Tripped sensor identification
If the horn sounds four times and the parking lights flash four times
when you disarm the system, this indicates that the alarm was trig-
gered. The number of times the indicator light flashes indicates what
sensor caused the alarm condition.
To enter identification mode:
1. Open the driver's door and leave it open.
2. Turn the ignition switch to the "ON" position two times. ("LOCK" →
"ON" → "LOCK" → "ON" → "LOCK")
3. The indicator light will start flashing.
The indicator light provides the following indications.
Flashing one time: Any door or the rear gate has been opened.
Flashing three times: The impact sensor in the system's unit has
been activated. This may indicate that your vehicle has been shocked
or tampered with by some outside force and/or unauthorized person.
Flashing four times: The ignition switch has been turned on or the
battery has been disconnected.
To exit this mode, close the door and turn the ignition switch to the
"ON" position.
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