Subaru 2009 IMPREZA Service Manual page 156

17.Engine Control Module (ECM)
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the lower inner trim of passenger's
side. <Ref. to EI-55, REMOVAL, Lower Inner
Trim.>
3) Turn over the floor mat of passenger's seat.
4) Remove the protect cover.
5) Remove the bolts and nuts which hold the ECM
to the bracket.
6) Disconnect the ECM connectors, and take out
the ECM.
Engine Control Module (ECM)
IN-00203
FU-03416
FU-03417
FU(H4SO)-45
FUEL INJECTION (FUEL SYSTEMS)
B: INSTALLATION
Install in the reverse order of removal.
CAUTION:
When the ECM of model with immobilizer has
been replaced, be sure to perform the registra-
tion of immobilizer system. (Refer to "PC appli-
cation help for Subaru Select Monitor".)
NOTE:
When replacing the ECM, be careful not to use the
wrong spec. ECM to avoid any damage on the fuel
injection system.
Tightening torque:
7.5 N·m (0.8 kgf-m, 5.5 ft-lb)