Geely EC718 2009 Workshop Manual page 206

2-124 Control System JL4G18-D
2. Conditions For Setting DTC and The Fault Location:
DTC Code DTC Detection Strategy
1. Fuel Adjustment Value Higher
Than Maximum Limit
P0170
2. Fuel Adjustment Value Lower
P0171
Than Minimum Limit
P0172
3. Fuel Adjustment Value Higher
P2177
Than Maximum Limit (Low-Load
P2178
Zone)
P2187
4. Fuel Adjustment Value Lower
P2188
Than Minimum Limit (Low-Load
Zone)
3. Schematic:
Refer to 2.2.6.1 Schematic.
4. Diagnostic Steps:
Note
Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.
Step 1 Check there are no other control system DTC codes.
No
Step 2 Read the intake manifold absolute pressure sensor data.
EC718/EC718RV EC715/EC715RV 10/2009
Conditions For Setting The DTC
(Control Strategy)
1. Excessive air coefficient is higher
than the standard value 1.23.
2. Excessive air coefficient is higher
than the standard value 0.77.
3. With engine speed at 1,640-3,200
rpm, throttle opens 20% -60%.
4. With engine speed at 1,640-3,200
rpm, throttle opens 20% -60%.
(a) Connect scan tool to the datalink connector.
(b) Turn the ignition switch to "ON" position.
(c) Press the scan tool power button.
(d) Select the following menu items: Engine/Read DTC codes.
(e) Read DTC codes.
Are there DTC codes other than P0170, P0171, P0172, P2177,
P2178, P2187, P2188?
Yes
(a) Turn the ignition switch to "OFF" position and connect scan
tool.
(b) Start the vehicle.
(c) Read the intake manifold absolute pressure sensor data.
(d) Read the scan tool for atmospheric pressure value, and
compare it with
Pressure Correlation.
Is scan tool atmospheric pressure reading normal?
Fault Locations
1. Fuel Injectors
2. Canister
3. MAP
4. TPS
5. Pre-Catalytic Oxygen
Sensor
Refer to 2.2.7.11 DTC Code Index
table2.2.1.3 Altitude and Atmospheric
Engine