Subaru Impreza 2003 Service Manual page 853

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
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(H4SOw/oOBD)-28, OPERATION, Clear Memory Mode.> and <Ref. to EN(H4SOw/oOBD)-26, OPER-
ATION, Inspection Mode.>
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
B136
OXYGEN SENSOR
B18
B22 E3
15
ECM
E
EN(H4SOw/oOBD)-77
BATTERY
SBF-5
ENGINE (DIAGNOSTICS)
B18
2 1
4 3
B47
1 2
3 4
5 6
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
B136
1 2 3 4 5
8 9 10 11 12 13 14 15 16 17 18
21 22 23 24 25 26 27
E
6 7
19 20
28 29 30
EN-01560