Subaru LEGACY 2006 Manual page 972

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Step
6 CHECK HARNESS BETWEEN ECM AND IG-
NITION COIL AND IGNITOR ASSEMBLY
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Disconnect the connector from ignition coil
and ignitor assembly.
4) Measure the resistance of harness
between ECM and ignition coil and ignitor
assembly connector.
Connector & terminal
(B137) No. 18 — (E12) No. 1:
(B137) No. 19 — (E12) No. 4:
7 CHECK HARNESS BETWEEN ECM AND IG-
NITION COIL AND IGNITOR ASSEMBLY
CONNECTOR.
Measure the resistance of harness between
ECM and engine ground.
Connector & terminal:
(B137) No. 18 — Engine ground:
(B137) No. 19 — Engine ground:
8 CHECK POOR CONTACT.
Check poor contact of ECM connector.
Diagnostics for Engine Starting Failure
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is there poor contact in ECM
connector?
EN(H4SO U5)(diag)-67
ENGINE (DIAGNOSTICS)
Check Yes
Go to step 7.
Go to step 8.
Repair the poor
contact of ECM
connector.
No
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and ignition
coil and ignitor as-
sembly connector
• Poor contact of
coupling connector
Repair the ground
short circuit of har-
ness between
ECM and ignition
coil and ignitor
assembly connec-
tor.
Check fuel pump
circuit. <Ref. to
EN(H4SO
U5)(diag)-68,
FUEL PUMP CIR-
CUIT, Diagnostics
for Engine Start-
ing Failure.>