Subaru LEGACY 2004 Service Manual page 346

Step
8 CHECK INPUT VOLTAGE OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM con-
nector and chassis ground.
Connector & terminal
(B136) No. 3 (+) — Chassis ground (
(B136) No. 4 (+) — Chassis ground (
Diagnostics for Engine Starting Failure
Is the voltage more than 10 V? Check ignition
−
):
−
):
EN(H4SO 2.0)(diag)-57
Check
control system.
<Ref. to EN(H4SO
2.0)(diag)-58,
IGNITION CON-
TROL SYSTEM,
Diagnostics for
Engine Starting
Failure.>
ENGINE (DIAGNOSTICS)
Yes No
Repair the open or
ground short cir-
cuit in harness
between ECM
connector and
main relay connec-
tor.