Subaru 2002 IMPREZA Service Manual page 936

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DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

ENGINE (DIAGNOSTICS)

N: DTC 46 CO RESISTOR (GENERAL SPEC. VEHICLES)

• DIAGNOSIS:

• The CO resistor signal is abnormal.

• The harness connector between ECM and CO resistor is open or shorted.

• The CO value is not adjusted to specifications.

• TROUBLE SYMPTOM:

• Erroneous idling

• Mixture ratio is too rich or too lean.

After repair or replacement of faulty parts, conduct CLEAR MEMORY and INSPECTION MODES. <Ref.

to EN(w/oOBD)-30, OPERATION, Clear Memory Mode.> and <Ref. to EN(w/oOBD)-28, OPERATION,

Inspection Mode.>

• WIRING DIAGRAM:

EN(w/oOBD)-102

1 2 3 4 5 6 7 8 9 10 11 12

11 12 13 14 15

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2001 impreza