Subaru IMPREZA 2004 Service Manual page 771

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
H: DTC 31 THROTTLE POSITION SENSOR
• DIAGNOSIS:
• The throttle position sensor signal is abnormal.
• The throttle position sensor is installed abnormally.
• The harness connector between ECM and throttle position sensor is open or shorted.
• TROUBLE SYMPTOM:
• Erroneous idling
• Engine stalls
• Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory and inspection modes. <Ref. to
EN(H4SOw/oOBD)(diag)-28, OPERATION, Clear Memory Mode.> and <Ref. to EN(H4SOw/oOBD)(di-
ag)-26, OPERATION, Inspection Mode.>
• WIRING DIAGRAM:
7
3
B83
THROTTLE
POSITION
SENSOR
E13
: WITH IMMOBILIZER
WI
OI : WITHOUT IMMOBILIZER
E2
B21
LHD RHD OI
LHD RHD OI
B136 ECM
EN(H4SOw/oOBD)(diag)-75
ENGINE (DIAGNOSTICS)
1 2 3 4
LHD:
1 2 3 4
5
RHD:
1 2 3 4 5 6
1 2
5
9 10
13
17 18
B136
1 2 3
3 8 9 10 11 12 13 14 15
21 22 23 24 25
2
B83
E13
B83
6 7 8
B83
B21
3 4
6 7 8
11 12
14 15 16
19 20
4 5 6 7
16 17 18 19 20
26 27 28 29 30
EN-02585