Subaru 2002 IMPREZA Service Manual page 1330

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
AF:DTC P0246 — WASTEGATE CONTROL SOLENOID VALVE CIRCUIT HIGH
INPUT —
• DTC DETECTING CONDITION:
• Immediately at fault recognition
• TROUBLE SYMPTOM:
• Erroneous idling
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
Step
1 CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B137) No. 24 (+) — Chassis ground ( − − − − ):
LHD 8 LHD
B61 F44
B137 ECM
B127
WASTEGATE
CONTROL SOLENOID
VALVE
Is the voltage more than 10 V? Go to step 3.
EN(TURBO)-170
BATTERY
SBF-5
E
Check
F44
1 2 3 4
5 6 7 8
B47
1 2
3 4
5 6
B137
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
B127
1 2
EN0974
Yes No
Go to step 2.