Chery Fora (Elara A520). Manual — part 151

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

43

DTC: P0340 Phase sensor signal failure

No.

Operating steps

Result Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”

Next step

Yes

To step No.4

2

Take off the phase sensor joint from the cable; check the

voltage value by multimeter between phase sensor joint pin

No.3 and No.1; and observe if it is around 12V.

No

Next step

Yes

Repair or

replace the

cable

3

Check if there is open circuit or short circuit to ground

between circuit of phase sensor joint pin No.3 and main

relay pin No.87; check if there is bad contact of phase

sensor connector No.1.

No

Next step

Yes

To step 6

4

Check the voltage if it is around 9.9V between phase sensor

joint pin No.2 and power supply cathode.

No

Next step

Yes

Repair or

replace cable

5

Check if there is open circuit or short circuit to power

supply or to ground between phase sensor joint pin No.2

and ECU pin No.79.

No

Next step

Yes

Diagnosis help

6

Check the camshaft signal disc if it is in good conditions.

No

Replace signal

disc

DTC: P0342 Much lower voltage of the phase sensor

No.

Operating steps

Result Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”

Next step

Yes

To step No.4

2

Take off the phase sensor joint from the cable; check the

voltage value by multimeter between phase sensor joint pin

No.3 and No.1; and observe if it is around 12V.

No

Next step

Yes

Repair or

replace the

cable

3

Check if there is open circuit or short circuit to ground

between circuit of phase sensor joint pin No.3 and main

relay pin No.87; check if there is bad contact of phase

sensor connector No.1.

No

Next step

Yes

To step 6

4

Check the voltage if it is around 9.9V between phase sensor

joint pin No.2 and power supply cathode.

No

Next step

Yes

Repair or

replace cable

5

Check if there is open circuit or short circuit to power

supply or to ground between the circuit of phase sensor

joint pin No.2 and ECU pin No.79.

No

Next step

Yes

Diagnosis help

6

Check the camshaft signal disc if it is in good conditions.

No

Replace signal

disc

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

44

DTC: P0343 Much higher voltage of the phase sensor

No.

Operating steps

Result

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”

Next step

Yes

To step No.4

2

Take off the phase sensor joint from the cable; check

the voltage value by multimeter between phase sensor

joint pin No.3 and No.1; and observe if it is around

12V.

No

Next step

Yes

Repair or replace

the cable

3

Check if there is open circuit or short circuit to ground

between circuit of phase sensor joint pin No.3 and main

relay pin No.87; check if there is bad contact of phase

sensor connector No.1.

No

Next step

Yes

To step 6

4

Check the voltage if it is around 9.9V between phase

sensor joint pin No.2 and power supply cathode.

No

Next step

Yes

Repair or replace

cable

5

Check if there is open circuit or short circuit to power

supply or to ground between the circuit of phase sensor

joint pin No.2 and ECU pin No.79.

No

Next step

Yes

Diagnosis help

6

Check the camshaft signal disc if it is in good

conditions.

No

Replace signal

disc

DTC: P0443 Canister control valve drive grade control circuit failure

No.

Operating steps

Result

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”

Next step

Yes

To step No.4

2

Take off the canister control valve joint from the cable;

check the voltage value by multimeter between this

joint pin No.1 and power supply cathode; and observe

if it is around 12V.

No

Next step

Yes

Repair or replace

the cable

3

Check if there is open circuit or short circuit to ground

of the canister control valve power supply ends circuit.

No

To step No.2

Yes

Next step

4

Check the resistance value if it is around 22-30Ωwhen

it is 20℃ between canister control valve pin No.1 and

pin No.2.

No

Replace the valve

Yes

Diagnosis help

5

Check the voltage if it is around 3.7V between canister

control valve joint pin No.1 and power supply cathode.

No

Next step

Yes

Repair or replace

cable

6

Check if there is open circuit between the circuit of

canister joint pin No.2 and ECU pin No. 46.

No

Diagnosis help

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

45

DTC: P0444 Much lower voltage of canister control valve drive grade control circuit

No.

Operating steps

Result

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”

Next step

Yes

To step No.4

2

Take off the canister control valve joint from the cable;

check the voltage value by multimeter between this

joint pin No.1 and power supply cathode; and observe

if it is around 12V.

No

Next step

Yes

Repair or

replace the

cable

3

Check if there is open circuit or short circuit to ground

of the canister control valve power supply ends circuit.

No

To step No.2

Yes

Next step

4

Check the resistance value if it is around 22-30Ω when

it is 20℃ between canister control valve pin No.1 and

pin No.2.

No

Replace the

valve

Yes

Diagnosis help

5

Check the voltage by the multimeter if it is around

3.7V between canister control valve joint pin No.1 and

power supply cathode.

No

Next step

Yes

Repair or

replace cable

6

Check if there is short circuit to ground between the

circuit of canister joint pin No.2 and ECU pin No. 46.

No

Diagnosis help

DTC: P0445 Much higher voltage of canister control valve drives grade control circuit

No.

Operating steps

Result

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”

Next step

Yes

To step No.4

2

Take off the canister control valve joint from the cable;

check the voltage value by multimeter between this joint

pin No.1 and power supply cathode; and observe if it is

around 12V.

No

Next step

Yes

Repair or replace

the cable

3

Check if there is open circuit or short circuit to ground of

the canister control valve power supply ends circuit.

No

To step No.2

Yes

Next step

4

Check the resistance value if it is around 22-30Ωwhen it
is 20℃ between canister control valve pin No.1 and pin

No.2.

No

Replace the

valve

Yes

Diagnosis help

5

Check the voltage by the multimeter if it is around 3.7V
between canister control valve joint pin No.1 and power

supply cathode.

No

Next step

Yes

Repair or replace

cable

6

Check if there is short circuit to power supply between

the circuit of canister joint pin No.2 and ECU pin No. 46.

No

Diagnosis help

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

46

DTC: P0480 Air conditioner condenser cooling fan relay control circuit failure

No.

Operating steps

Result

Follow up

steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”

Next step

Yes

To step

No.4

2

Take off the air conditioner condenser cooling fan relay;

put the ignition switch to “ON” position, and check the

voltage value by multimeter between this relay power

supply end that is relay pin No.30, No.85 and power

supply cathode if it is around 12V.

No

Next step

Yes

Repair or

replace the

cable

3

Check if there is open circuit or short circuit to ground of

the air conditioner cooling fan relay power supply end

circuit.

No

To step

No.2

Yes

Replace

relay

4

Check the voltage by the multimeter if it is around 3.7V

between air conditioner condenser cooling fan relay

control ends that is relay pin No.86 and power supply

cathode.

No

Next step

Yes

Repair or

replace

cable

5

Check if there is open circuit or short circuit to power

supply or to ground between the circuit of relay control

end pin No.86 and ECU pin No. 50.

No

Diagnosis

help

DTC: P0500 Unreasonable failure of speed signal

No.

Operating steps

Result

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”.

Next step

Yes

Check and

repair ABS

system

2

If it is a vehicle with ABS, please check if there is

ABS DTC.

No

Next step

Yes

Next step

3

Check if the speedometer finger works normally.

No

Check the

speedometer

line

Yes

Next step

4

Check if the speed sensor works normally.

No

Replace speed

sensor

Yes

Repair or

replace cable

5

Check if there is open circuit or short circuit to power

supply or to ground between the circuit of speed

sensor and ECU pin No. 59.

No

Diagnosis help