Chery A11. Manual - part 179

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

Go to next step

Yes

Go to next step

Check the resistance between Pin 1 and Pin 2 of
Cylinder 2 injector with a multimeter to see if it is
around 11-16Ω at 20℃.

Replace
injector

Yes

Diagnosis
Instruction

Check the voltage between Pin 2 of Cylinder 2
injector connector and cathode of power supply
with a multimeter to see if it is around 3.7V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 2 of Cylinder 2
injector connector and Pin 6 of ECU to see if open,
short circuit to power/ground occurs.

Diagnosis
Instruction

Failure code: P0203 injector circuit error in Cylinder 3

Step Operation

Result Solution

Connect scanner and commutator, and then turn
ignition switch to “ON”.

Go to next step

Yes

Go to Step 4

Unplug Cylinder 3 injector connector from wire
harness, check the voltage between Pin 1 of the
connector and cathode of power supply with a
multimeter to see if it is around 12V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 1 of Cylinder 3
injector connector and main relay to see if open
circuit or short circuit to ground occurs.

Go to next step

Yes

Go to next step

Check the resistance between Pin 1 and Pin 2 of
Cylinder 3 injector with a multimeter to see if it is
around 11-16Ω at 20℃.

Replace
injector

Yes

Diagnosis
Instruction

Check the voltage between Pin 2 of Cylinder 3
injector connector and cathode of power supply
with a multimeter to see if it is around 3.7V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 2 of Cylinder 3
injector connector and Pin 7 of ECU to see if open,
short circuit to power/ground occurs.

Diagnosis
Instruction

Failure code: P0204 injector circuit error in Cylinder 4

Step Operation

Result Solution

Connect scanner and commutator, and then turn
ignition switch to “ON”.

Go to next step

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

Yes

Go to Step 4

Unplug Cylinder 4 injector connector from wire
harness, check the voltage between Pin 1 of the
connector and cathode of power supply with a
multimeter to see if it is around 12V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 1 of Cylinder 4
injector connector and main relay to see if open
circuit or short circuit to ground occurs.

Go to next step

Yes

Go to next step

Check the resistance between Pin 1 and Pin 2 of
Cylinder 4 injector with a multimeter to see if it is
around 11-16Ω at 20℃.

Replace
injector

Yes

Diagnosis
Instruction

Check the voltage between Pin 2 of Cylinder 4
injector connector and cathode of power supply
with a multimeter to see if it is around 3.7V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 2 of Cylinder 4
injector connector and Pin 47 of ECU to see if open,
short circuit to power/ground occurs.

Diagnosis
Instruction

Failure code: P0230 control circuit error of fuel pump

Step Operation

Result Solution

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

Yes

Go to Step 4

Unplug fuel pump relay, turn ignition switch to
“ON”, check respectively the voltage between Pin
30 of relay and cathode of power supply, Pin 86 of
relay (i.e. power supply terminals of fuel pump
relay) and cathode of power supply to see if it is
around 12V.

Go to next step

Yes

Repair or
replace wire
harness

Check power supply terminal circuit of relay to see
if open circuit or short circuit to ground occurs.

Go to Step 2

Yes

Replace fuel
pump relay

Check the voltage between Pin 85 of fuel pump
relay (control terminal) and cathode of power
supply with a multimeter to see if it is around 3.7V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 85 of relay and
Pin 69 of ECU to see if open, short circuit to
power/ground occurs.

Diagnosis
Instruction

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

Failure code: P0325 circuit error of knock sensor

Step Operation

Result Solution

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

Yes

Go to next step

Unplug knock sensor connector from wire harness,
check the resistance between Pin 1 and Pin 2 of
knock sensor with a multimeter to see if it is greater
than 1MΩ.

No Replace

sensor

Yes

Repair or
replace wire
harness

Check respectively the connections between Pin 1
of knock sensor connector and Pin 19 of ECU, Pin 2
of knock sensor connector and Pin 20 of ECU to see
if open, short circuit to power/ground occurs.

Go to next step

Yes

Diagnosis
Instruction

Replace knock sensor as per specification, trial run
the engine at a speed higher than 2200RPM.
Recheck to see if failure code P0325 occurs again.

Check to see if
it is random
failure

Failure code: P0335 signal error of crankshaft position sensor

Step Operation

Result Solution

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

Yes

Go to next step

Unplug engine speed sensor connector from wire
harness, check the resistance between Pin 2 and Pin
3 of engine speed sensor with a multimeter to see if
it is around 770-950Ω at 20℃.

No Replace

sensor

Yes

Repair or
replace wire
harness

Check repectively the connections between Pin 2 of
engine speed sensor and Pin 34 of ECU, Pin 3 of
engine speed sensor and Pin 15 to see if open, short
circuit to power/ground occurs.

Go to next step

Yes

Diagnosis
Instruction

Check signal panel of flywheel to see if it is in good
condition.

Replace signal
panel

Failure code: P0336 improper signal from crankshaft position sensor

Step Operation

Result Solution

Connect scanner and commutator, and then turn
ignition switch to “OFF”.

Go to next step

Maintenance Manual for Chery · Windcloud

M7.9.7 EFI System

Yes

Go to next step

Unplug engine speed sensor connector from wire
harness, check the resistance between Pin 2 and Pin
3 of engine speed sensor with a multimeter to see if
it is around 770-950Ω at 20℃.

No Replace

sensor

Yes

Repair or
replace wire
harness

Check repectively the connections between Pin 2 of
engine speed sensor and Pin 34 of ECU, Pin 3 of
engine speed sensor and Pin 15 to see if open, short
circuit to power/ground occurs.

Go to next step

Yes

Diagnosis
Instruction

Check signal panel of flywheel to see if it is in good
condition.

Replace signal
panel

Failure code: P0340 signal error of phase sensor

Step Operation

Result Solution

Connect scanner and commutator, and then turn
ignition switch to “ON”.

Go to next step

Yes

Go to Step 4

Unplug phase sensor connector from wire harness,
check the voltage between Connector 3 and Pin 1 of
phase sensor with a multimeter to see if it is around
12V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 3 of phase sensor
and Pin 87 of main relay to see if open circuit or
short circuit to ground occurs;
Check Pin 1 of phase sensor to see if it is properly
grounded.

Go to next step

Yes

Go to Step 6

Check the voltage between Pin 2 of phase sensor
connector and cathode of power supply to see if it is
around 9.9V.

Go to next step

Yes

Repair or
replace wire
harness

Check the connection between Pin 2 of phase sensor
connector and Pin 79 of ECU to see if open circuit,
short circuit to power or to ground occurs.

Go to next step

Yes

Diagnosis
Instruction

Check camshaft signal panel to see if it is in good
condition.

Replace signal
panel

Failure code: P0443 driver stage control circuit error of carbon canister

control valve

Step Operation

Result Solution

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