Subaru 2004 LEGACY Service Manual page 99

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
AT:DTC P0198 ENGINE OIL TEMPERATURE SENSOR CIRCUIT HIGH
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
• Hard to start
• Erroneous idling
• Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)(diag)-40,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-33, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
B20
OIL
TEMPERATURE
SENSOR
E75
E1 E2
B21
*
*
B83
1
*
2
*
B136 ECM
EN(H6DO)(diag)-168
1
2
LHD: 3
RHD: TERMINAL No.
RANDOM ARRANGEMENT
LHD: 8
RHD: TERMINAL No.
RANDOM ARRANGEMENT
E75
1 2
B20
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
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
B83
1 2 3 4
5 6 7 8
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-02503