Subaru 2009 IMPREZA Service Manual page 718

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
6 CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance between ECM con-
nectors.
Connector & terminal
(B134) No. 19 — (B134) No. 18:
(B134) No. 19 — (B134) No. 28:
Check
Is the resistance 1 M or
more?
EN(H4SO)(diag)-301
ENGINE (DIAGNOSTICS)
Yes No
Repair the poor Repair the short
contact of elec- circuit to power in
tronic throttle con- harness between
trol connector. ECM and elec-
Replace the elec- tronic throttle con-
tronic throttle con- trol connector.
trol if defective.
<Ref. to
FU(H4SO)-14,
Throttle Body.>