Subaru LEGACY 2006 Manual page 117

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
C: DTC P0030 HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1)
DTC DETECTING CONDITION:
• Detected when two consecutive driving cycles with fault occur.
• GENERAL DESCRIPTION <Ref. to GD(H4SO)-10, DTC P0030 HO2S HEATER CONTROL CIRCUIT
(BANK 1 SENSOR 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After repairing or replacing the defective part, perform the Clear Memory Mode <Ref. to EN(H4SO)(di-
ag)-43, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)(diag)-34, PRO-
CEDURE, Inspection Mode.>.
WIRING DIAGRAM:
OXYGEN SENSOR RELAY
6
4
2
1
B327
*
: TERMINAL No. OPTIONAL
ARRANGEMENT
BATTERY
SBF-5
B21
E2
FRONT OXYGEN
(A/F) SENSOR
E22
E2
B21
JOINT
CONNECTOR
B138
B: B135
ECM
C: B136
EN(H4SO)(diag)-80
B327
1 2
3 4
5 6
E22
3 2 1
6 5 4
B21
1 2 3 4 5 6 7 8
12 13 14 15 16 17 18 19
23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38
42 43 44 45
48 49 50 51
B: B135
1 2 3 4
10 11 12 13 14 15
8 9
20 21 22 23 24
28 29 30 31 32 33
C: B136
1 2 3 4
7 8 9 10 11 12 13 14 15
17 18 19 20 21 22 23
28 29 30 31
B138
E E
1 2 3 4
5 6 7 8
9 10 11
20 21 22
39 40 41
46 47
52 53 54
5 6 7
16 17 18 19
25 26 27
34 35
5 6
16
24 25 26 27
32 33 34 35
EN-04027