IF14
IF2
IF1
IF5
IF7
IF3
IF16
IF27
IF25
IF26
IF28
IF30
IF24
IF20
IF19
IF23
IF18
IF21
IF13
IF12
IF15
IF9
IF10
IF8
F17
F22
M
FE02-5110b
(a)
Turn the ignition switch to "OFF" position.
(b)
Remove IF12 from the I/P fuse block.
(c)
Use multimeter to measure whether there is conduction
between the two terminals.
Conducted?
No
Check whether there are short circuits.
Replace the fuses.
Yes
Step 3
Check ECM power supply voltage.
FE02-5111b
1
3
5
7
8
6
4
2
9
10
11
12
13
23
24
25
26
27
28
29
30
37
51
52
53
54
55
56
57
58
59
60
61
62
63
64
38
39
40
41
42
43
44
45
46
47
48
49
50
31
32
33
34
35
36
14
15
16
17
18
19
20
21
22
ECM Harness Connector EN01
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect ECM harness connector EN01.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure voltage between ECM harness connector EN01
terminal No.16 and a reliable ground.
(e)
Measure voltage between ECM harness connector EN01
terminal No.17 and a reliable ground.
Standard Voltage: 11-14 V
Voltage normal?
No
Yes
Step 4
Check ECM ground circuit.
FE02-5112b
1
3
5
7
8
6
4
2
9
10
11
12
13
23
24
25
26
27
28
29
30
37
51
52
53
54
55
56
57
58
59
60
61
62
63
64
38
39
40
41
42
43
44
45
46
47
48
49
50
31
32
33
34
35
36
14
15
16
17
18
19
20
21
22
ECM Harness Connector EN01
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect ECM harness connector EN01.
(c)
Measure resistance between ECM harness connector EN01
terminal No.5 and a reliable ground.
(d)
Measure resistance between ECM harness connector EN01
terminal No.43 and a reliable ground.
(e)
Measure resistance between ECM harness connector EN01
terminal No.48 and a reliable ground.
Standard Resistance: Less than 1 Ω
Resistance normal?
No
ECM ground circuit is faulty. Repair the faulty
part.
Engine
Control System JL4G18-D
2-189
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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