Subaru 2002 Impreza Service Manual page 244

TRANSMISSION CONTROL MODULE (TCM)
Automatic Transmission
Selector lever position
D and 3 ranges
G: SHIFT PAlTERN SELECTION CONTROL
The TCM changes its gear shift control pattern automatically between the Base pattern suitable
for ordinary economy driving and the Power pattern suitable for climbing uphill or rapid accelera-
tion.
In the Power pattern, the downshift point and upshift point are set higher than those of the Base
pattern.
Changeover from Base to Power pattern
Performed automatically according to accelerator pedal depression speed.
"D" range (Base pattern)
Large
Small
High
Low
Vehicle speed
"D" range (Power pattern)
Large
Small
Low
High
H3H1231A
Vehicle speed
AT-22