Subaru 2009 IMPREZA Service Manual page 1332

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
M: DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-29, DTC P0103 MASS OR VOLUME AIR FLOW CIR-
CUIT HIGH INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Improper idling
• Engine stalls.
• Poor driving performance
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-54,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PROCE-
DURE, Inspection Mode.>.
WIRING DIAGRAM:
MAIN RELAY
21
22
23
24
B220
*
*
B83
: TERMINAL No.
*
OPTIONAL ARRANGEMENT
B3
1 2 3 4 5
B220
4
MASS AIR FLOW
& INTAKE AIR
TEMPERATURE SENSOR
B3
B135 ECM
B135
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
EN(H4DOTC)(diag)-111
FUSE
(RELAY BLOCK)
15A
SBF-7
3
B83
1 2
1 2 3 4
5 6 7 8 3 4
5 6
7 8
ENGINE (DIAGNOSTICS)
BATTERY
B220
9 13 17 21
10 14 18 22
11 12 15 16 19 20 23 24
25 29 33 37
26 30 34 38
27 28 31 32 35 36 39 40
E
EN-06135