Chery A11. Manual — part 184
Maintenance Manual for Chery · Windcloud
M7.9.7 EFI System
if ignition advance angle is normal after coolant
temperature reaches normal value.
No Adjust
ignition
advance angle
Yes
Go to next step
17
Check if cylinder compression pressure of
engine is normal.
No Troubleshooting
Yes
Repair or replace
18
Check if intake manifold absolute pressure and
intake air temperature sensor is blocked up.
No
Go to next step
Yes Replace
ECU
19
Check if coolant temperature sensor is in good
order.
No
Repair or replace
44
Maintenance Manual for Chery · Windcloud
M7.9.7 EFI System
5). Vehicle cold starting is difficult
Step Operation
Result
Solution
Yes Eliminate
failure
displayed
1
Set ignition switch in “ON”. Check with scanner
to see if there is failure information record.
No
Go to next step
Yes
Go to next step
2
Check with multimeter to see if coolant
temperature sensor is in good order. (Or connect
in series a 1.5K ohmic resistance between pins of
39# and 35# of ECU to replace coolant
temperature sensor and then start engine.) If
starting is OK, it shows coolant temperature
sensor is out of order.
No Replace
sensor
Yes
Go to next step
3
Switch on the ignition switch and connect
commutator between ECU and wire harness.
Check if the voltages of the following pins of
ECU are in good order: if the accumulator voltage
is about 12V on 13#, while 0 on 80# and 61#.
No
Check wire harness
and socket
connector
Yes
Go to next step
4
Check if air filter is smooth.
No Replace
Yes
Go to next step
5
After successful starting, check to see if intake
manifold pressure is between 35-65kPa during
idling.
No Eliminate
intake
system air leakage
failure
Yes
Check throttle and
idle speed passage
6
Slightly step down on throttle to see if the starting
is easy.
No
Go to next step
Yes
Go to next step
7
Pull out the idle speed actuator connector on wire
harness before engine coolant temperature reaches
35℃ to see if engine speed declines.
No Repair
or
replace
idle speed actuator
Yes
Go to next step
8
Connect fuel pressure gauge valve (connecting
point may differ among models). Ground directly
the 86# pin of fuel pump relay. Switch on the
ignition switch to make fuel pump relay and fuel
pump work, and then check if fuel pressure is at
about 350kPa.
No
Go to step 12
Yes
Go to step 11
9
Provide 12V voltage directly from accumulator to
injector with special connector, and check if
injector is working in good order.
No
Go to next step
Yes
Go to next step
10
Recheck injector to see if it is working in good
order after cleaning.
No Replace
injector
Yes Replace
fuel
11
Check if fuel is deteriorated or contains water.
No
Go to step 17
45
Maintenance Manual for Chery · Windcloud
M7.9.7 EFI System
Yes
Go to next step
12
Check if fuel pressure is lower than 350kPa
No
Go to step 16
Yes
Go to next step
13
Shut down fuel gauge valve. Switch on ignition
switch again to make fuel pump work once more,
and check if fuel pressure is established.
No
Go to step 15
Yes Replace fuel
pressure regulator
14
Turn on fuel guage valve, clamp fuel return pipe
with fuel return interceptor to ensure no fuel
return, and check if fuel pressure is formed
rapidly.
No Repair/
replace
injector or fuel pipe
Yes Repair
or
replace
fuel inlet pipe
15
Check if leakage or clogging occurs in fuel inlet
pipe.
No
Replace fuel pump
Yes Repair
or
replace
fuel return pipe
16
Check if fuel return pipe is blocked up or bent.
No Replace
fuel
pressure regulator
Yes
Go to next step
17
Check if cylinder pressure of engine is normal.
No Troubleshooting
Yes Repair
18
Check if leakage occurs in engine intake system.
No
Go to next step
Yes
Repair or replace
19
Check if intake manifold absolute pressure and
intake air temperature sensor is blocked up.
No Replace
ECU
46
Maintenance Manual for Chery · Windcloud
M7.9.7 EFI System
6). Instable idle speed occurs anytime
Yes Eliminate
failure
displayed
1
Set ignition switch in “ON”. Check with scanner
to see if there is failure information record.
No
Go to next step
Yes Repair
or
replace
idle speed actuator
2
Check if EWD3 idle speed actuator or idle speed
actuator of idle speed stepper motor is stuck.
No
Go to next step
Yes
Check wire harness
and socket
connector
3
Switch on the ignition switch, and check if the
connections between water temperature sensor,
idle speed stepper motor and ECU are in good
condition.
No
Go to next step
Yes
Go to step 8
4
Make engine run at idle speed, and stall cylinders
one by one to see if engine speed declines or
fluctuates.
No
Go to next step
Yes
Go to next step
5
Check the injector working condition of each
cylinder to see if it is in good order.
No
Check injector and
wire harness
Yes
Go to next step
6
Check to see if the high voltage line resistance of
each cylinder is in good order.
No Replace
Yes Replace
7
Check if ignition coil is damaged.
No
Go to next step
Yes
Go to next step
8
Check if spark plug is in good order.
No
Replace spark plug
Yes
Go to next step
9
Connect fuel pressure gauge valve. Strap the 30#
and 87# pins of pump relay to make fuel pump
work, and then check if fuel pressure is at about
350kPa.
No
Go to step 13
Yes
Go to step 12
10
Provide 12V voltage directly from accumulator to
injector with special connector, and check if
injector is working in good order.
No
Go to next step
Yes
Go to next step
11
Recheck injector to see if it is working in good
order after cleaning.
No Replace
injector
Yes Replace
fuel
12
Check if fuel is deteriorated or conatians water.
No
Go to step 18
Yes
Go to next step
13
Check if fuel pressure is lower than 350kPa.
No
Go to step 17
Yes
Go to next step
14
Shut down fuel gauge valve. Switch on ignition
switch again to make fuel pump work once more,
and check if fuel pressure is established.
No
Go to step 16
15
Turn on fuel guage valve, clamp fuel return pipe
with fuel return interceptor to ensure no fuel
Yes Replace fuel
pressure regulator
47
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст