Subaru Impreza 2004 Service Manual page 224

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step Check Yes No
3 CHECK FUSE SBF-5. Is the fuse blown? Replace the fuse. Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit in
harness between
ECM and battery
• Poor contact in
ECM connector
• Poor contact in
battery terminal
EN(H4DOTC)(diag)-303