Subaru IMPREZA GD 2007 Series Manual page 1664

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR PEDAL POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the ECM
and accelerator pedal position sensor.
3) Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B135) No. 21 — Chassis ground:
(B135) No. 23 — Chassis ground:
(B135) No. 23 — (B136) No. 6:
2 CHECK SHORT CIRCUIT INSIDE THE ECM.
1) Connect the ECM.
2) Measure the resistance between accelera-
tor pedal position sensor connector and chassis
ground.
Connector & terminal
(B315) No. 6 — Chassis ground:
Check
Is the resistance 1 MΩ or more? Go to step 2.
Is the resistance 1 MΩ or more? Replace the accel-
EN(STI)(diag)-333
ENGINE (DIAGNOSTICS)
Yes No
Repair the ground
short of the har-
ness between the
ECM and accelera-
tor pedal position
sensor connector.
Repair the ground
erator pedal. <Ref. short of the har-
to SP(H4SO)-3, ness between the
Accelerator ECM and accelera-
Pedal.> tor pedal position
sensor connector.
Replace the ECM if
defective. <Ref. to
FU(H4DOTC)-50,
Engine Control
Module (ECM).>