Subaru 2002 IMPREZA Service Manual page 1612

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
10.POWER Indicator Light Dis-
play
A: INSPECTION
When any on-board diagnostics item is malfunc-
tioning, the display on POWER indicator light blinks
from the time malfunction is detected after starting
the engine until ignition switch is turned to OFF.
The malfunctioning part or unit can be determined
POWER INDICATOR LIGHT DISPLAY
AT-26
by a diagnostic trouble code (DTC) during on-board
diagnostics operation. Problems which occurred
previously can also be identified through the mem-
ory function. If the POWER indicator does not show
a problem (although a problem is occurring), the
problem can be determined by checking the perfor-
mance characteristics of each sensor using select
monitor. The indicator signal is as shown in the fig-
ure.
S3M0062F