Geely EC718 2009 Workshop Manual page 744

2-662 Control System JL4G15-D
Yes
Diagnostic completed.
Step 10
5. Repair Instructions:
Replace intake air pressure and temperature sensors. Refer to
Replacement.
2.12.7.20 DTC P0117 P0118
1. DTC Descriptor:
DTC P0117
DTC P0118
ECT sensor is a variable resistor with a negative temperature coefficient and used to measure the temperature of engine coolant.
ECM provides a 5V voltage through ECM harness connector EO01 terminal No.24 to ECT sensor harness connector EO23 terminal
No.1 and a low internal reference voltage through EO01 terminal No.29 to ECT sensor connector EO23 terminal No.3. ECM will
always record the length of time the ignition switched off. When starting, if the ignition switched off time reaches the preset time, the
engine control module will compare the engine coolant temperature and intake air temperature in order to determine whether the
difference between the two is in normal working range.
2. Conditions For Setting DTC and The Fault Location:
DTC Detection
DTC Code
Strategy
P0117
1. More Than the
Upper Limit
P0118
2. Lower Than the
Lower Limit
EC718/EC718RV EC715/EC715RV 10/2009
Engine Coolant Temperature Sensor Circuit Voltage Too Low
Engine Coolant Temperature Sensor Circuit Voltage Too High
Conditions For Setting The DTC (Control Strategy)
1. Idle
2. Coolant temperature sensor circuit is short to ground.
3. Coolant temperature by default changes as the running
time changes.
1. Idle.
2. Coolant temperature sensor signal circuit is open or short
to 5V voltage.
3. Coolant temperature by default changes as the running
time changes.
Intermittent Fault. Refer to
No
Fault Check
2.2.8.7 Intake Air Pressure and Temperature Sensor
Engine
2.2.7.3 Intermittent
Fault Locations
1. Sensor Circuit
2. Sensor
3. ECM