Subaru Impreza 2003 Service Manual page 1698

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
10.POWER Indicator Light Display
A: INSPECTION
When any on-board diagnostics item is malfunctioning, 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 by a DTC during on-board diagnostics operation. Problems which occurred
previously can also be identified through the memory function. If the POWER indicator does not show a prob-
lem (although a problem is occurring), the problem can be determined by checking the performance charac-
teristics of each sensor using select monitor. The indicator signal is as shown in the figure.
Ignition switch (engine OFF)
ON
OFF
Normal
ON
OFF
Abnormal(Trouble occurs.)
ON
OFF
Normal (power switch ON)
ON
OFF
POWER INDICATOR LIGHT DISPLAY
2 secs
2 secs
2 secs
4AT-28
0.25 secs
Blink
Power indicator light ON)
AT-00344