Subaru LEGACY 2003 Service Manual page 81
Engine section 1
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- Service manual (4441 pages) ,
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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 in short or open.
• 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)-28, OPERATION, Clear Memory Mode.> and <Ref. to EN(H4SOw/oOBD)-26, OP-
ERATION, Inspection Mode.>
• WIRING DIAGRAM:
THROTTLE
POSITION
SENSOR
E13
E2
B21
4
6
B83
B136
ECM
EN(H4SOw/oOBD)-79
ENGINE (DIAGNOSTICS)
E13
1 2 3 4
B21
1 2
3 4
5
6 7
8
9 10
11 12
13
14 15
16
17 18
19 20
B83
1 2 3 4 5 6 7 8 9 10 11 12
B136
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
EN-01056
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