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
Vehicle Speed Sensor Harness Connector EN21
1
2
3
FE02-5098b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect speed sensor wiring harness connector EN21.
(c)
Disconnect ECM harness connector EN01.
(d)
Measure resistance between the vehicle speed sensor
harness connector EN21 terminal No.3 and ECM harness
connector EN01 terminal No.57. Check whether the circuit is
open.
(e)
Measure resistance between the vehicle speed sensor
harness connector EN21 terminal No.3 and a reliable ground.
Check whether the circuit is short to ground.
(f)
Measure voltage between the vehicle speed sensor harness
connector EN21 terminal No.3 and power supply. Check
whether the circuit is short to power supply.
Test Items
Standard Value
Resistance Between EN21 (2) and EN01 (57)
Less than 1 Ω
Resistance Between EN21 (2) and a Reliable
Ground
10 kΩ or higher
Voltage Between EN21 (2) and a Reliable
Ground
0 V
Are the values specified values?
No
Repair or replace the wiring harness
connector. Go to step 8
Yes
Step 3
Check the vehicle speed sensor power supply circuit.
Vehicle Speed Sensor Harness Connector EN21
1
2
3
FE02-5099
b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect speed sensor wiring harness connector EN21.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure voltage between vehicle speed sensor harness
connector EN21 terminal No.1 and a reliable ground.
Standard Voltage: 11-14 V
(e)
Connect vehicle speed sensor harness connector EN21.
Is the value specified value?
No
Check whether there is a short circuit between
the vehicle speed sensor terminal No.3 and
the main relay terminal No.87. Repair the
faulty part.
Yes
Step 4
Check the vehicle speed sensor ground circuit.
2-178
Control System JL4G18-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
Page 4: ......
Page 330: ...Next Step 10 End 2 248 Fuel System JL4G18 D Engine EC718 EC718RV EC715 EC715RV 10 2009 ...
Page 1164: ......
Page 2008: ......