Subaru IMPREZA GD 2007 Series Manual page 1600

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK HARNESS BETWEEN ECM AND
SECONDARY AIR PUMP RELAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the ECM
and secondary air pump relay.
3) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B136) No. 8 (+) — Chassis ground (–):
Check
Is the voltage 10 V or more?
EN(STI)(diag)-269
ENGINE (DIAGNOSTICS)
Yes No
Repair the short Even if the malfunc-
circuit to power in tion indicator light
the harness illuminates, the cir-
between ECM and cuit has returned to
secondary air a normal condition
pump relay. at this time. Repro-
duce the fault con-
dition, and
reperform the
check.
NOTE:
In this case, there
may be a tempo-
rary connector
contact failure.