Subaru IMPREZA 2004 Service Manual page 554

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CN:DTC P1517 ISC SOLENOID VALVE SIGNAL #4 CIRCUIT MALFUNCTION
(HIGH INPUT)
• DTC DETECTING CONDITION:
• Immediately at fault recognition
• TROUBLE SYMPTOM:
• Erroneous idling
• Engine stalls.
• Engine breathing
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO)(diag)-47,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)(diag)-40, OPERATION,
Inspection Mode.>.
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
IDLE
AIR CONTROL
SOLENOID
VALVE
E7
ECM
A: B134 C: B136
B: B135 D: B137
E
2
LHD LHD
B61 F44
B22
E3
E2
B21
B22
E3
EN(H4SO)(diag)-245
BATTERY
SBF-5
E
ENGINE (DIAGNOSTICS)
B47
E7
1 2 3 1 2
4 5 6 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
B21
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
B: B135
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18 19
22 23 24 25 26 27 28
20 21
D: B137
1 2 3 4
5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20
A: B134
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 31 32 33 34 35
C: 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
EN-02610