Subaru IMPREZA GD 2007 Series Manual page 1609

asieps_tobira_IM_US.book 278 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)
ENGINE (DIAGNOSTICS)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
2 CHECK HARNESS BETWEEN ECM AND IG-
NITION SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and
ignition switch.
3) Measure the resistance of harness between
the ECM and ignition switch connector.
Connector & terminal
(B136) No. 32 — (B72) No. 3:
NOTE:
For the MT model, measure while depressing
the clutch pedal.
3 CHECK HARNESS BETWEEN ECM AND IG-
NITION SWITCH.
Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B136) No. 32 — Chassis ground:
NOTE:
For the MT model, measure while depressing
the clutch pedal.
Check
Is the resistance less than 1 Ω? Go to step 3.
Is the resistance 1 MΩ or more? Repair the ground
EN(STI)(diag)-278
Yes No
Check DTC using Go to step 2.
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(STI)(diag)-71,
List of Diagnostic
Trouble Code
(DTC).>
NOTE:
Check the follow-
ing item and repair
or replace if neces-
sary.
• Open circuit of
harness between
the ECM and igni-
tion coil switch
connector
• Blown out of fuse
(SBF-4)
• Poor contact of
the clutch switch
connector (MT
model)
• Poor contact of
the clutch switch
(MT model)
Repair poor con-
short circuit of har- tact of the ECM
ness between the connector.
ECM and ignition
switch connector.