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2-468
Cooling System JL4G18-D
86
2
J
1
L
87
30
5
85
3
1
2
K
1
I
5 3
5
2
3
87
ECM Harness Connector EN01
64
63
62
61
60
59
58
57
50
49
48
47
46
45
44
43
36
35
34
33
32
31
30
29
22
21
20
19
18
17
16
15
Yes
Step 10
Check ECM circuit.
Yes
Step 11
Replace ECM.
Next
Diagnostic completed.
Step 12
2.8.7.4 Low-Speed Cooling Fan Does Not Run
Note
Before carry out this diagnostic procedures, please Refer to the2.8.7.2 Cooling Fan Circuit Diagnosis, which will facilitate
the Diagnostic.
Check the low-speed cooling fan power supply.
Step 1
EC718/EC718RV EC715/EC715RV 10/2009
EF28
EF27
EF08
1
G
5 3
2
30
EF01
3
86
85
F
87
3
86
86
E
30
87
87
86
85
85
30
A
1413 12 11 10
86
87
9
8
6
5
7
85
85
4
3
2
1
56
55
54
53
52
51
8
7
6
5
42
41
40
39
38
37
28
27
26
25
24
23
3
4
1
2
14
13
12
11
10
9
FE02-7806b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect ECM harness connector EN01.
(c)
Remove the high-speed cooling fan relay A.
(d)
Test the continuity between the high-speed cooling fan relay
2
5
D
86 terminal A and EN01 terminal No.52.
1
2
5
C
(e)
Measure voltage between high-speed cooling fan relay 86
1
B
30
terminal A and a reliable ground. check whether the circuit is
short to power supply.
A
30
Standard Value:
Relay A (86)-EN01 (52)
Relay A (86) - A Reliable Ground
Is the measured value specified value?
No
(a)
Check whether ECM power supply circuit is normal.
(b)
Check whether ECM ground circuit is normal.
No
Test Items
Circuit between Relay 86 terminal A and
EN01 terminal No.52 is open. check and
repair the relevant parts.
Repair the faulty part.
Engine
Specified Value
Less than 1 Ω
0 V
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