Subaru Impreza 2004 Service Manual page 24

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
K: DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT
• DTC DETECTING CONDITION:
• Immediately at fault recognition
• TROUBLE SYMPTOM:
• Erroneous idling
• Engine stalls.
• Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
47, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC)(diag)-39, Inspec-
tion Mode.>.
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
1
*
* 2
B83
LHD : 3
1
*
RHD : 2
2 LHD : 6
*
RHD : 1
B3
1 2 3 4 5
F44
1 2 3 4
5 6 7 8
LHD
B61
MASS AIR FLOW AND INTAKE
AIR TEMPERATURE SENSOR
B3
B :
B135
ECM
C :
B136
B47 B136
1 2
1 2 3 4
3 4
7 8 9 10 11 12
5 6
13 14 15 16
EN(H4DOTC)(diag)-103
SBF-5
8 LHD
F44
B135
5 6 1 2 3 4 5 6
10 11 12 13 14 15
17
20 21 22 23 24
ENGINE (DIAGNOSTICS)
BATTERY
B83
1 2 3
7 8 9
4 5 6
16 17 18 19
26 27 28
25
(LHD)
1 2 3 4 5 6
(RHD)
E
EN-01303