Subaru Impreza 2003 Service Manual page 176

FUEL INJECTION (FUEL SYSTEMS)
17.Engine Control Module (ECM)
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the lower inner trim of passenger side.
<Ref. to EI-47, REMOVAL, Lower Inner Trim.>
3) Detach the floor mat of front passenger seat.
4) Remove the protect cover.
5) Remove the nuts (A) which hold ECM to bracket.
6) Remove the clip (B) from bracket.
(B)
7) Disconnect the ECM connectors and take out
the ECM.
ENGINE CONTROL MODULE (ECM)
FU-00009
FU-00315
(A)
(A)
FU-00316
FU(H4SO)-48
B: INSTALLATION
Install in the reverse order of removal.
CAUTION:
When replacing ECM, be careful not to use the
wrong spec. ECM to avoid any damage to the
fuel injection system.
Tightening torque:
5 N·m (0.51 kgf-m, 3.7 ft-lb)