Subaru 2004 LEGACY Service Manual page 109

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
BC:DTC P0306 CYLINDER 6 MISFIRE DETECTED
DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• Immediately at fault recognition (A misfire which could damage catalyst occurs.)
TROUBLE SYMPTOM:
• Engine stalls.
• Erroneous idling
• Rough driving
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)(diag)-40,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-33, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
FUEL INJECTOR
No. 1
E43 E44
E5 E16
E6 E17
1 2
E5 E16
FUEL INJECTOR FUEL INJECTOR
No. 2
B136
B47
1 2
1 2 3 4
3 4
7 8 9 10 11 12 13 14 15
5 6
17 18 19 20 21 22 23
28 29 30 31
EN(H6DO)(diag)-178
SBF-8
B136
ECM
E6
E17
FUEL INJECTOR
No. 3 No. 4
5 6
1 2 3 4
16
12 13 14 15
24 25 26 27
23 24 25 26 27 28 29 30 31 32 33
32 33 34 35
34 35
42 43
48 49
BATTERY
E43
FUEL INJECTOR FUEL INJECTOR
No. 5 No. 6
B21
5 6 7 8 9 10 11
16 17 18 19 20 21 22
36 37 38 39 40 41
44 45 46 47
50 51 52 53 54
B21
E2
E44
E
EN-02505