Subaru IMPREZA GD 2007 Series Manual page 1692

asieps_tobira_IM_US.book 361 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
7 CHECK HARNESS BETWEEN SECONDARY
AIR COMBINATION VALVE AND CHASSIS
GROUND.
Measure the resistance between the secondary air
combination valve connector and chassis ground.
Connector & terminal
(E116) No. 4 — Chassis ground:
8 CHECK HARNESS BETWEEN SECONDARY
AIR COMBINATION VALVE RELAY AND
SECONDARY AIR COMBINATION VALVE
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the secondary air combination
valve relay from the relay box.
3) Measure the resistance of harness between
secondary air combination valve relay and sec-
ondary air combination valve connector.
Connector & terminal
(F27) No. 11 — (E116) No. 2:
9 CHECK SECONDARY AIR COMBINATION
VALVE RELAY.
1) Connect the battery to terminals No. 12 and
No. 14 of the secondary air combination valve relay.
2) Measure the resistance between the sec-
ondary air combination valve relay terminals.
Terminals
No. 10 — No. 11:
10 CHECK SECONDARY AIR COMBINATION
VALVE RELAY.
Measure the resistance between the secondary
air combination valve relay terminals with the
battery disconnected.
Terminals
No. 10 — No. 11:
11 CHECK SECONDARY AIR COMBINATION
VALVE RELAY POWER SUPPLY.
1) Turn the ignition switch to ON.
2) Measure the voltage between the second-
ary air combination valve relay connector and
chassis ground.
Connector & terminal
(F27) No. 10 (+) — Chassis ground (–):
(F27) No. 12 (+) — Chassis ground (–):
12 CHECK HARNESS BETWEEN ECM AND
SECONDARY AIR COMBINATION VALVE
RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector of ECM.
3) Measure the resistance of harness between
ECM and secondary air combination valve relay
connector.
Connector & terminal
(B136) No. 30 — (F27) No. 14:
Check
Is the resistance less than 5 Ω? Go to step 8.
Is the resistance less than 1 Ω? Go to step 9.
Is the resistance less than 1 Ω? Go to step 10.
Is the resistance 1 MΩ or more? Go to step 11.
Is the voltage 10 V or more?
Is the resistance less than 1 Ω? Go to step 13.
EN(STI)(diag)-361
ENGINE (DIAGNOSTICS)
Yes No
Repair the open
circuit of the har-
ness between sec-
ondary air
combination valve
and chassis
ground.
Repair the open
circuit of harness
between second-
ary air combination
valve relay and
secondary air com-
bination valve con-
nector.
Replace the sec-
ondary air combi-
nation valve relay.
Replace the sec-
ondary air combi-
nation valve relay.
Go to step 12. Repair the open or
ground short circuit
of power supply
circuit.
Repair the open
circuit of harness
between ECM and
secondary air com-
bination valve relay
connector.