Subaru 2002 IMPREZA Service Manual page 1398

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
BF:DTC P0509 — IDLE CONTROL SYSTEM CIRCUIT 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(TURBO)-45, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(TURBO)-42, Inspection Mode.> .
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
IDLE
AIR CONTROL
SOLENOID
VALVE
E7
LHD
E2
F61
F76
B209
LHD
B136 ECM
Step
1 CHECK THROTTLE CABLE.
LHD 8 LHD
B61 F44
RHD
B61
F44
RHD
F60 : LHD B22 : RHD
E3
E2
B21
E
EN(TURBO)-238
BATTERY
SBF-5
Check
Does the throttle cable have
play for adjustment?
B209
A1 A2 A3 A4 A5
B1 B2 B4 B5
C3
C1 C2 C4 C5
D1 D2 D4 D5
E1 E5
F1 F5
G1G2 G4 G5
H1 H2 H5
H4
H3
I1 I2 I4 I5
J3
J1 J2 J4 J5
F60 : LHD
B22 : RHD
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
E7
1 2 3
F61 : LHD
B21
: RHD
1 2 3 4
5 6 7
9 10 11 12
13 14 15
17 18 19 20
B136
1 2 3 4 5 6
8 9 10 11 12 13 14 15 16
17 18 22 23 24
19 20 21
E
Yes
Go to step 2. Adjust the throttle
cable. <Ref. to SP-
9, INSTALLA-
TION, Accelerator
Control Cable.>
F44
1 2 3 4
5 6 7 8
B47
1 2
3 4
5 6
8
16
7
EN1444
No