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2-850
Engine Cooling System JL4G15-D
86
2
1
J
L
87
30
5
85
3
1
K
2
1
I
5 3
5
2
3
87
ECM Harness Connector EO35
16
15
14
13
73
32
31
30
29
52
51
50
48
47
46
45
49
72
71
70
69
68
67
66
65
Yes
Step 7
Check ECM working circuit.
Yes
Step 8
Replace ECM.
Next
Step 9
Diagnostic completed.
2.18.3.5 Cooling Fan Always Runs At High Speed
Note
When this fault is present, it is recommended to carry out diagnostic when engine is completely cooled down.
Step 1
Verify the fault.
EC718/EC718RV EC715/EC715RV 10/2009
EF17
EF16
EF15
1
5 3
G
2
30
EF14
86
85
F
87
86
E
87
87
30
85
86
1413 12 11 10
A
30
87
9
8
6
5
7
4
3
2
1
85
12
11
10
9
8
7
6
5
4
3
2
28
27
26
25
24
23
22
21
20
19
18
44
43
42
41
40
39
38
36
35
34
37
64
63
62
61
60
59
58
57
56
55
54
FE02-7903b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect ECM harness connector EN01.
(c)
Remove the low-speed cooling fan relay B.
(d)
Test continuity between cooling fan low speed relay B
2
terminal No.86 and ECM harness connector EO35 terminal
3
5
D
1
2
No.67.
3
5
C
1
86
(e)
Measure resistance between cooling fan low-speed relay B
B
30
85
terminal No.86 and a reliable ground. Check whether the
86
30
A
circuit is short to ground.
85
Standard Value:
Resistance Between Relay B (86) and
EO35 (67)
Resistance Between Relay B (86) and A
1
Reliable Ground
17
33
Are measured values specified values?
53
No
(a)
Check whether ECM power supply circuit is normal.
(b)
Check whether ECM ground circuit is normal.
No
(a)
Carry out crankshaft self learn after ECM replacement. Refer
to
2.12.7.11 Crankshaft Position Sensor (CKP)
Test Items
Relay B terminal No.86 and EO35 terminal
No.67 wiring harnesses are faulty.
Repair the faulty part.
Engine
Specified Value
Less than 1 Ω
10 kΩ or higher
Learn.
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