Subaru 2004 LEGACY Service Manual page 187
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Also See for 2004 LEGACY:
- Service manual (4537 pages) ,
- Owner's manual (525 pages) ,
- General service manual (144 pages)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
DB:DTC P2128 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT
HIGH INPUT
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
• Erroneous idling
• Poor driving performance
WIRING DIAGRAM:
ACCELERATOR
POSITION
SENSOR
B315
2
*
3
*
1
*
Step
1
CHECK ACCELERATOR POSITION SEN-
SOR OUTPUT.
1) Turn the ignition switch to ON.
2) Read the data of sub accelerator position
sensor signal using Subaru Select Monitor.
MAIN
SUB
RHD
RHD
B: B135
B136
ECM
C:
B137
D:
LHD: B122
1
*
RHD: B138
LHD: 7
2
*
RHD: TERMINAL No.
LHD: 2
3
*
RHD: TERMINAL No.
B21
LHD: 1
*
4
RHD: TERMINAL No.
E2
LHD: 8
5
*
RHD: TERMINAL No.
E
Is the voltage less than 4.8 V? Go to step 2.
EN(H6DO)(diag)-256
4
7
B122
*
4
*
5
B83
RANDOM ARRANGEMENT
RANDOM ARRANGEMENT
RANDOM ARRANGEMENT
RANDOM ARRANGEMENT
Check
B315
1 2 3 4 5 6
B83
B122
B138
1 2 3 4
5 6 7 8
B21
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
36
37
38
39
40
41
42
43
44 45
46
47
48
49
50
51
52
53
54
B:
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
C:
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
31
32
33 34
35
D:
B137
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
EN-02516
Yes
No
Go to step 3.
- Quick Links:
- Wiring Diagram
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