Subaru 2009 IMPREZA Service Manual page 1298

Step
6 CHECK HARNESS BETWEEN ECM AND IG-
NITION COIL CONNECTOR.
Measure the resistance of harness between
ECM and engine ground.
Connector & terminal
(B137) No. 18 — Engine ground:
(B137) No. 19 — Engine ground:
(B137) No. 20 — Engine ground:
(B137) No. 21 — Engine ground:
7 CHECK POOR CONTACT.
Check for poor contact of ECM connector.
Diagnostics for Engine Starting Failure
Is the resistance 1 M or
more?
Is there poor contact of ECM
connector?
EN(H4DOTC)(diag)-77
Check Yes
Go to step 7.
Repair the poor
contact of ECM
connector.
ENGINE (DIAGNOSTICS)
No
Repair the ground
short circuit of har-
ness between
ECM and ignition
coil connector.
Replace the igni-
tion coil. <Ref. to
IG(H4DOTC)-7,
Ignition Coil.>