Engine Coolant Temperature - Geely EC718 2009 Workshop Manual

Engine

Engine Coolant Temperature

Yes
Measure engine coolant temperature sensor signal circuit.
Step 3
Engine Coolant Temperature Sensor
Harness Connector EN23
A
Yes
Step 4 Measure engine coolant temperature sensor ground circuit.
Engine Coolant Temperature Sensor
Harness Connector EN23
A
B
A C
FE02-5030b
C
B
FE02-5031b
C
B
FE02-5032b
Control System JL4G18-D
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the engine coolant temperature sensor wiring
harness connector EN23.
(c) Measure engine coolant temperature sensor resistance.
Standard Resistance (Refer to the specific
parameters2.2.1.2 Temperature Sensor Temperature and
Resistance Correlation): 2400 Ω (68 ºF) at 20°C
(d) Connect the engine coolant temperature sensor wiring
harness connector EN23.
Is resistance the specified value?
Replace the engine coolant temperature
No
sensor. Go to step 9
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the engine coolant temperature sensor wiring
harness connector EN23.
(c) Turn the ignition switch to "ON" position.
(d) Measure voltage between engine coolant temperature
sensor EN23 terminal A and a reliable ground.
Standard Voltage: 4.7-5.5 V
(e) Connect the engine coolant temperature sensor wiring
harness connector EN23.
Is voltage normal?
Go to step 5
No
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the engine coolant temperature sensor wiring
harness connector EN23.
(c) Turn the ignition switch to "ON" position.
(d) Measure resistance between engine coolant temperature
sensor wiring harness connector EN23 terminal No.C and a
reliable ground.
Standard Resistance: Less than 3 Ω
(e) Connect the engine coolant temperature sensor wiring
harness connector EN23.
Is resistance normal?
Go to step 6
No
EC718/EC718RV EC715/EC715RV 10/2009
2-99