Geely EC718 2009 Workshop Manual page 260

2-178 Control System JL4G18-D
Vehicle Speed Sensor Harness Connector EN21
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
Step 3 Check the vehicle speed sensor power supply circuit.
Vehicle Speed Sensor Harness Connector EN21
1
Yes
Check the vehicle speed sensor ground circuit.
Step 4
EC718/EC718RV EC715/EC715RV 10/2009
1 2 3
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
FE02-5098b
2 3
FE02-5099b
(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
Resistance Between EN21 (2) and EN01 (57)
Resistance Between EN21 (2) and a Reliable
Ground
Voltage Between EN21 (2) and a Reliable
Ground
Are the values specified values?
Repair or replace the wiring harness
No
connector. Go to step 8
Go to step 6
Yes
(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?
Check whether there is a short circuit between
No
the vehicle speed sensor terminal No.3 and
the main relay terminal No.87. Repair the
faulty part.
Engine
Standard Value
Less than 1 Ω
10 kΩ or higher
0 V