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Engine
86
2
J
1
L
87
30
5
85
3
1
2
K
1
I
5 3
5
2
3
87
Yes
Check low-speed relay B control circuit.
Step 9
86
2
J
1
L
87
30
5
85
3
1
K
2
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
Check ECM circuit.
Step 10
EF28
EF27
EF08
1
G
5 3
2
30
EF01
3
86
F
85
87
3
86
86
87
E
30
87
85
85
86
1413 12 11 10
86
B
30
87
9
8
6
5
7
85
85
4
3
2
1
FE02-7810b
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
B
30
1413 12 11 10
86
87
9
8
6
5
85
7
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
2
1
14
13
12
11
10
9
FE02-7811b
(a)
Turn the ignition switch to "OFF" position.
(b)
Remove the low-speed cooling fan relay B.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure voltage between relay B terminal No.85 and a
reliable ground.
2
D
Standard Voltage: 11-14 V
5
1
2
5
C
1
Is the voltage specified value?
B
30
No
A
30
(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 the continuity between the cooling fan low speed relay
B terminal No.86 and EN01 terminal No.62.
2
5
D
1
(e)
Measure voltage between high-speed cooling fan relay B
2
5
C
1
terminal No.86 and a reliable ground. Check whether there
B
30
is a circuit short to power supply.
A
30
Standard Value:
Relay B (86)-EN01 (62)
Relay B (86) - Reliable Ground
Is the measured value specified values?
No
(a)
Check whether ECM power supply circuit is normal.
(b)
Check whether ECM ground circuit is normal.
No
Cooling System JL4G18-D
Circuit between relay terminal No.85 and the
main relay terminal No.3 is open.
Test Items
Circuit between relay B terminal No.86 and
EN01 terminal No.62 is open.
Repair the faulty part.
EC718/EC718RV EC715/EC715RV 10/2009
2-471
Specified Value
Less than 1 Ω
0 V
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