Geely EC718 2009 Workshop Manual page 182

2-100 Control System JL4G18-D
Check the engine coolant temperature sensor signal circuit.
Step 5
Engine Coolant Temperature Sensor
Harness Connector EN23
A
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 6 Check the engine coolant temperature sensor ground circuit.
EC718/EC718RV EC715/EC715RV 10/2009
C
B
56 55 54 53 52 51
8 7
6
5
42 41 40 39 38 37
28 27 26 25 24 23
4 3
2 1
9
14 13 12 11 10
FE02-5033b
Go to step 7
Yes
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the engine coolant temperature sensor wiring
harness connector EN23.
(c) Disconnect ECM harness connector EN01.
(d) Measure resistance between engine coolant temperature
sensor wiring harness connector EN23 terminal A and ECM
harness connector terminal No.41. Check whether the circuit
is open.
(e) Measure resistance between engine coolant temperature
sensor wiring harness connector EN23 terminal A and a
reliable ground. Check whether the circuit is short to ground.
(f) Measure voltage between engine coolant temperature
sensor wiring harness connector EN23 terminal A and a
reliable ground. Check whether the circuit is short to power
supply.
Test Items
Resistance Between EN23 (A) and EN01
(41)
Resistance Between EN23 (A) and a
Reliable Ground
Voltage Between EN23 (A) and a Reliable
Ground
Go to step 7
Next
Engine
Standard Value
Less than 1 Ω
10 kΩ or higher
0 V