Subaru IMPREZA GD 2007 Series Manual page 1524

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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 resistance of harness between
ECM and secondary air pump relay.
Connector & terminal
(B136) No. 8 — (F129) No. 6:
2 CHECK HARNESS BETWEEN ECM AND
SECONDARY AIR PUMP RELAY.
Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B136) No. 8 — Chassis ground:
Check
Is the resistance less than 1 Ω? Go to step 2.
Is the resistance 1 MΩ or more? Even if the malfunc-
EN(STI)(diag)-193
ENGINE (DIAGNOSTICS)
Yes No
Repair the open
circuit of harness
between ECM and
secondary air
pump relay.
Repair the ground
tion indicator light short circuit of har-
illuminates, the cir- ness between
cuit has returned to ECM and second-
a normal condition ary air 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.