Subaru 2004 LEGACY Service Manual page 60

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Z: DTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT
LOW INPUT
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
• Erroneous idling
• Engine stalls.
• Poor driving performance
WIRING DIAGRAM:
ELECTRONIC
THROTTLE
CONTROL RELAY
B21
E2
E
B362
3
1 2
4
5
7 8
6
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
B362
7
5
6
MAIN RELAY
8
ECM
B135
B: C: B136 D:
B122
RHD
7
*
*
RHD
3
ELECTRONIC
THROTTLE CONTROL
E57
B122
B83
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
B138
23 24 25
1 2 3 4
34 35 36 37 38 39 40 41
5 6 7 8
42 43
48 49 50 51 52 53 54
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
EN(H6DO)(diag)-129
BATTERY
SBF-8
B137
B83
4
5
B20
E1
E
B21
26 27 28 29 30 31 32 33
44 45 46 47
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
ENGINE (DIAGNOSTICS)
E
1 LHD: 6
*
RHD: TERMINAL No.
RANDOM ARRANGEMENT
* 3
LHD: 2
2
*
* 1
RHD: TERMINAL No.
RANDOM ARRANGEMENT
2
*
LHD: B122
* 3
RHD: B138
LHD: 8
4
*
RHD: TERMINAL No.
RANDOM ARRANGEMENT
LHD: 3
5
*
RHD: TERMINAL No.
RANDOM ARRANGEMENT
B20
1 2 3 4
1 2 3 4 5 6
5 6 7 8
9 10 11 12
13 14 15 16
E57
EN-02502