Subaru 2002 IMPREZA Service Manual page 922

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
I: DTC 32 OXYGEN SENSOR
• DIAGNOSIS:
• The oxygen sensor is not in function.
• The harness connector between ECM and oxygen sensor is open or shorted.
• TROUBLE SYMPTOM:
• Failure of engine to start
• Erroneous idling
• Poor driving performance
• Engine stalls.
• Idle mixture is out of specifications.
CAUTION:
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:
MAIN RELAY
6
4
5
3
2
1
B47
B136
B61 F44
LHD 2 LHD
OXYGEN SENSOR
B18
B22 E3
15
ECM
EN(w/oOBD)-88
BATTERY
SBF-5
B18
2 1
4 3
B47
1 2
3 4
5 6
F44
1 2 3 4
5 6 7 8
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
B136
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
EN0940