Subaru Legacy 2005 Service Manual page 1323

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
H: DTC P0108 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE
CIRCUIT HIGH INPUT
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
37, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC)(diag)-30, PROCE-
DURE, Inspection Mode.>.
WIRING DIAGRAM:
: TERMINAL NO. RANDOM ARRANGEMENT
*
B83
E21
1 2 3 4
1 2 3
5 6 7 8
Step
1
CHECK INPUT SIGNAL OF ECM.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(B136) No. 16 (+) — Chassis ground (
MANIFOLD ABSOLUTE
PRESSURE SENSOR
*
*
B83
B136
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
Is the voltage more than 4.5 V? Go to step 3.
):
EN(H4DOTC)(diag)-83
E21
E2
B21
ECM
B136
1
2
3
4
5
6
7 8
9
10
11 12 13 14 15
17 18 19 20 21
22 23
24
25
26 27
28
29
30
31
32
33 34
Check
ENGINE (DIAGNOSTICS)
16
35
EN-01949
Yes
No
Go to step 2.

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