Chery automobile Service Manual page 178

Verify that the fuel return pipe has any
13
leakage or bending.
Disconnect the connector of idle speed
actuator before the temperature of
14 engine coolant reaches 35
observe whether the engine speed is
decreasing.
Turn the ignition switch to "ON"
position. verify that the voltages at
15
following ECU pins are normal: 13# is
at about 12V of battery voltage; 80# and
61# are at zero.
Run the engine at idle speed; until the
coolant temperature reaches normal
16
value, then verify that the ignition
advance angle is normal.
Verify that the compression pressure of
17
engine cylinder is normal.
Verify that the absolute pressure and
18 temperature
manifold has any blockage.
Verify that the coolant temperature
19
sensor is normal.
0
C in order to
sensor of air intake
G-69
No Replace the fuel pump
Repair or replace the
Yes
fuel return pipe
Replace the fuel
No
pressure regulator
Yes Proceed to next step.
Repair or replace the
No
idle speed actuator
Yes Proceed to next step.
Inspect the wiring
No harness and plug in
connector
Yes Proceed to next step.
Adjust the ignition
No
advance angle
Yes Proceed to next step.
No Fix the malfunction
Yes Repair or replace
No Proceed to next step.
Yes Replace the ECU.
No Repair or replace