Geely EC718 2009 Workshop Manual page 746

2-664 Control System JL4G15-D
Yes
Step 3 Measure engine coolant temperature sensor signal circuit.
Engine Coolant Temperature Sensor Harness
Connector EO23
1 2 3
Yes
Measure engine coolant temperature sensor ground circuit.
Step 4
Engine Coolant Temperature Sensor Harness
Connector EO23
1 2 3
EC718/EC718RV EC715/EC715RV 10/2009
(b) Disconnect the engine coolant temperature sensor wiring
harness connector EO23.
(c) Measure engine coolant temperature sensor resistance.
Standard Resistance: (Refer to the specific
parameters2.2.1.2 Temperature Sensor Temperature and
Resistance Correlation): 2,400 Ω/20°C (68 ºF)
(d) Connect the engine coolant temperature sensor wiring
harness connector EO23.
Is the resistance specified value?
No
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the engine coolant temperature sensor wiring
harness connector EO23.
(c) Turn the ignition switch to "ON" position.
(d) Measure voltage between engine coolant temperature
sensor EO23 terminal No.1 and a reliable ground.
Standard Voltage: 4.7-5 .5 V
(e) Connect the engine coolant temperature sensor wiring
harness connector EO23.
Voltage normal?
No
FE02-5344b
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the engine coolant temperature sensor wiring
harness connector EO23.
(c) Turn the ignition switch to "ON" position.
(d) Measure resistance between engine coolant temperature
sensor wiring harness connector EO23 terminal No.3 and A
reliable ground.
Standard Resistance: Less than 3 Ω
(e) Connect the engine coolant temperature sensor wiring
harness connector EO23.
Resistance normal?
No
FE02-5345b
Yes
Replace the engine coolant temperature
sensor. Go to step 9
Go to step 5
Go to step 6
Go to step 7
Engine