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2-846
Engine Cooling System JL4G15-D
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 cooling fan relay and cooling fan harness connector CA16 wiring harnesses.
Step 6
Cooling Fan Harness Connector CA16
86
2
J
1
L
87
30
5
85
3
1
2
K
1
I
5 3
5
2
3
87
Yes
Step 7
Replace cooling fan Low speed relay B. Confirm whether the fault has been fixed.
Step 8
Check low speed relay B coil power supply.
EC718/EC718RV EC715/EC715RV 10/2009
EF28
EF27
EF08
1
G
5 3
2
30
EF01
86
F
85
87
86
87
E
30
87
85
86
1413 12 11 10
B
30
87
9
8
6
5
7
85
4
3
2
1
FE02-7808b
1
2
3
EF28
EF27
EF08
1
G
5 3
2
30
EF01
3
86
85
F
87
3
86
86
E
30
87
87
85
85
86
1413 12 11 10
86
30
B
87
9
8
6
5
7
85
85
4
3
2
1
FE02-7809b
(a)
Turn the ignition switch to "OFF" position.
(b)
Remove the low-speed cooling fan relay B.
(c)
Measure voltage between low speed cooling fan relay B
terminal No.87 and a reliable ground.
Standard Voltage: 11-14 V
2
3
D
5
1
Is the voltage specified Value?
2
3
5
C
1
86
No
B
30
85
86
A
30
85
(a)
Turn the ignition switch to "OFF" position.
(b)
Remove the low-speed cooling fan relay.
(c)
Disconnect cooling fan wiring harness connector CA16.
(d)
Test continuity between low speed cooling fan relay B
terminal No.30 and cooling fan wiring harness connector
CA16 terminal No.1.
(e)
Measure resistance between low speed cooling fan relay B
terminal No.30 and a reliable ground. check whether the
circuit is short to ground.
Standard Value:
Resistance Between Relay B (30) and
CA16 (1)
Resistance Between Relay B (30) and
A Reliable Ground
2
5
D
1
2
5
C
1
Are measured values specified values?
B
30
No
A
30
Relay B terminal No.87 power supply circuit
malfunction. Inspect and repair faulty parts.
Test Items
Circuit between cooling fan relay terminal No.
30 and wiring harness connector CA16
terminal No.1 is faulty. Check and repair the
faulty part.
Engine
Specified Value
Less than 1 Ω
10 kΩ or higher
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