1999 Subaru Legacy Owner's Manual - Page 50
1999 Subaru Legacy Manual
Page 50 highlights
Doors and locks J 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 triggered. 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. To exit this mode, close the door and turn the ignition switch to the "ON" position. Windows OM-H2113 Turn the handle to open or close the window. - CONTINUED - 1-23