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Fig. 3 for Step 4
DTC P0115 (DTC NO.19) ENGINE COOLANT TEMPERATURE (ECT) CIRCUIT
MALFUNCTION
WIRING DIAGRAM / CIRCUIT DESCRIPTION
DTC DETECTING CONDITION
• Low engine coolant temperature (High voltage-High resis-
tance)
or
• High engine coolant temperature (Low voltage-Low resis-
tance)
NOTE:
• Before inspecting, be sure to check that coolant temp. meter in combination meter indicates normal
operating temperature (Engine is not overheating).
• When this DTC and P1709 are stored together, also clear DTC stored in TCM after completion of
repair.
• When DTC P0105 (No.11), P0110 (No.18), P0115 (No.19) and P0120 (No.13) are indicated together, it
is possible that "ORN" circuit open.
YEL/GRN
C42 (31P)
9
8
7
6
5
4
3
2
1
21
20
19
18
17
16
15
14
13
12
11
10
31
30
29
28 27
26
25
24
23
22
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-57
LT GRN
C42-14
ORN
C42-10
C41 (24P)
7
6
5
4
3
2
1
6
12
16
15
14
13 12
11
10
9
8
24
23
22
21
20
19
18
17
17
• "LT GRN" circuit open or shorted to power
• "ORN" circuit open
• ECT sensor malfunction
• ECM malfunction
ECM
5V
G02 (17P)
5
4
3
2
1
11
10
9
8
7
16
15
14
13
POSSIBLE CAUSE
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