Subaru 2009 IMPREZA Service Manual page 538

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
O: DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION<Ref. to GD(H4SO)-28, DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT
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(H4SO)(diag)-55,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4SO)(diag)-44, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
MAIN RELAY
37
38
39
40
B220
*
*
B83
B3
1 2 3 4 5
FUSE
B220
(RELAY BLOCK)
4 3
MASS AIR FLOW & INTAKE
AIR TEMPERATURE SENSOR
B3
B135 ECM
B220
1 2 9 13 17 21
10 14 18 22
3 4
11 12 15 16 19 20 23 24
5 6
7 8 25 29 33 37
26 30 34 38
27 28 31 32 35 36 39 40
EN(H4SO)(diag)-121
SBF-7
* : TERMINAL No. OPTIONAL ARRANGEMENT
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
ENGINE (DIAGNOSTICS)
BATTERY
E
B83
1 2 3 4
5 6 7 8
EN-06636