Chery A series. Manual — part 44
Yes
Replace the fuel
12
Verify that the fuel is deteriorated or
contaminated by water.
No
Proceed to Step 18.
Yes
Proceed to next step.
13
Verify that the fuel pressure is lower than
350kPa.
No
Proceed to Step 17.
Yes
Proceed to next step.
14
Close the fuel manometer valve. Connect the
ignition switch again to re-operate the fuel
pump in order to verify that the fuel pressure
can be established.
No
Proceed to Step 16.
Yes
Replace fuel and
pressure regulator
15
Open the fuel manometer valve and clamp
the fuel return pipe with the fuel tube clamp
to stop the fuel return in order to verify that
the fuel pressure can be established quickly.
No
Repair or replace the
fuel injector or fuel
pipe
Yes
Repair or replace the
fuel inlet pipe
16
Verify that the fuel inlet pipe has any
leakage or blockage.
No
Replace the fuel pump
Yes
Repair or replace the
fuel return pipe
17
Verify that the fuel return pipe has any
leakage or bending.
No
Replace the fuel
pressure regulator
Yes
Proceed to next step.
18
Connect an adapter between ECU and the
wiring harness. Then verify that there is any
voltage at the ECU’s pin No.44, 45, 63, 12
and 13, and to see whether the positive
power supply wires connected to the above
ECU’s pins and the ground wires connected
to the pin No. 3, 51, 53, 61 and 80 are
normal.
No
Repair or replace the
wiring harness.
Yes Repair
19
Verify that the parts of air intake system
have any air leakage.
No
Proceed to next step.
Yes
Repair or replace
20
Verify that the absolute pressure and
temperature sensor of air intake manifold has
any blockage.
No
Proceed to next step.
Yes
Proceed to next step.
21
Verify that the coolant temperature sensor is
normal.
No
Repair or replace
Yes
Fix the mechanical
malfunction
22
Verify that the unsuccessful startup is due to
mechanical reasons such as excessive
clearance between the piston and cylinder or
due to cylinder air leakage, etc.
No
Replace the ECU
G-65
3) Difficult start-up of hot engine
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
Yes
Fix the indicated
malfunction
1
Turn the ignition switch to “ON” position.
Inspect with the diagnostic tester to see
whether there is any malfunction
information record.
No
Proceed to next
step.
Yes
Proceed to next
step.
2
Connect the fuel manometer valve. Short
the 30# and 87# pins of the fuel pump relay
to operate the fuel pump in order to verify
that the fuel pressure is maintained at about
350kPa.
No
Proceed to Step 9.
Yes
Proceed to next
step.
3
Disconnect the connecting fuel pipe and
turn off the ignition switch. After 1 hour,
verify that the pressure of fuel system is
maintained between 250-300 kPa.
No
Repair the leakage
of fuel system
Yes
Replace the fuel
pressure regulator
4
Connect the connecting fuel pipe and block
the fuel return pipe with the fuel tube clamp
as well as close the fuel manometer valve.
Then turn off the ignition switch, after 1
hour, verify that the pressure of fuel system
is maintained between 250-300 kPa.
No
Proceed to next
step.
Yes
Replace the fuel
injector and fuel
pipe
5
Verify that the fuel injector and fuel pipe
have any fuel leakages.
No
Proceed to next
step.
Yes
Inspect the coolant
temperature and
circuit
6
Disconnect the connector of water
temperature sensor to start up the engine.
Observe whether it can successfully start up.
No
Proceed to next
step.
Yes
Proceed to next
step.
7
Put adaptor between ECU and wiring
harness. Then verify that there is any
voltage at the ECU’s 44#, 45#, 63#, 12# and
13# pins and to see whether the positive
power wires connected to the above ECU’s
pins and the ground wire connected to the
pins of 3#, 51#, 53#, 61# and 80# are
normal.
No
Repair or replace
the wiring harness
G-66
Yes End
No
Replace the ECU
8
Replace the fuel and try the hot start again.
Observe whether it can successfully start up.
No
Repair or replace
Yes
Proceed to next
step.
9
Verify that the fuel pipe has any blockage or
bending and to see whether the pressure
regulating valve functions of fuel pump is
normally.
No
Repair or replace
Yes
Proceed to next
step.
10
Inspect with multimeter to see whether there
is a voltage between two terminals of the
plug in connector of fuel pump.
No
Repair or replace
fuel pump relay
and wire
Yes
Proceed to next
step.
11
Inspect with multimeter to see whether the
resistance of fuel pump is correct.
No
Replace the fuel
pump
Yes
Replace the fuel
pump
12
Verify that the fuel pump is jammed.
No
Replace the ECU
G-67
4) Difficult start-up under normal engine speed
Item
No.
Operation procedure
Inspection
results
Follow-up procedure
Yes
Fix the indicated
malfunction
1
Turn the ignition switch to “ON”
position. Inspect with the diagnostic
tester to see whether there is any
malfunction information record.
No
Proceed to next step.
Yes
Proceed to next step.
2
Verify that the air filter is free of any
blockage.
No Replace
Yes
Proceed to next step.
3
After start up, verify that the air intake
manifold pressure is maintained between
35-65 kPa at idle speed.
No
Fix the leakage of air
intake system
4
Step on the throttle gently and observe
whether it’s easy to start up.
Yes
Replace and inspect the
throttle valve and idle
speed passage
Yes
Proceed to next step.
5
Connect the fuel manometer valve. Short
the 30# and 87# pins of the fuel pump
relay to operate the fuel pump in order to
verify that the fuel pressure is
maintained at about 350kPa.
No
Proceed to Step 9
Yes
Proceed to Step 8
6
Apply a voltage supply of 12V directly
between the battery and the fuel injector
with special connector, and verify that
the fuel injector functions normally.
No
Proceed to next step.
Yes
Proceed to next step.
7
After washing and cleaning the fuel
injector, verify that its function is
normal.
No
Replace the fuel
injector
Yes
Replace the fuel
8
Replace the fuel and verify that the fuel
is deteriorated or contaminated by water.
No
Proceed to Step 14
Yes
Proceed to next step.
9
Verify that the fuel pressure is lower
than 350kPa.
No
Proceed to Step 13
Yes
Proceed to next step.
10
Close the fuel manometer valve.
Connect the ignition switch again to
re-operate the fuel pump in order to
verify that the fuel pressure can be
established.
No
Proceed to Step 12.
Yes
Replace fuel pressure
regulator
11
Open the fuel manometer valve and
clamp the fuel return pipe with the fuel
tube clamp to stop the fuel return in
order to verify that the fuel pressure can
be established quickly.
No
Repair or replace the
fuel injector or the fuel
pipe
12
Verify that the fuel inlet pipe has any
leakage or blockage.
Yes
Repair or replace the
fuel air inlet pipe
G-68
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