Chery Fora (Elara A520). Manual — part 152

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

47

DTC: P0506 Rotating speed of idle speed is lower than target idle speed

No.

Operating steps

Result Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”.

Next step

Yes

Next step

2

Check if the throttle valve adjusting screw, accelerator

cable and throttle valve working in good conditions.

No

Carry out the

necessary

repair and

maintenance

Yes

Next step

3

Check if the idle speed regulator works in good conditions.

No

Carry out the

necessary

repair and

maintenance

Yes

Next step

4

E, check if the pressure of the fuel supplying system is too

low

F, check if the injector is jammed

G, check if the exhaust system is not straightway

No

Replace speed

sensor

DTC: P0507 Rotating speed of idle speed is higher than target idle speed

No.

Operating steps

Result

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”

Next step

Yes

Next step

2

Check if the throttle valve adjusting screw, accelerator

cable and throttle valve working in good conditions.

No

Carry out the

necessary repair

and

maintenance

Yes

Next step

3

Check if the idle speed regulator works in good conditions.

No

Carry out the

necessary repair

and

maintenance

Yes

Carry out the

necessary repair

and

maintenance

4

A, check if the system is leaking;

B, check if the injector is leaking;

C, check if the pressure of fuel supplying system is too

high

No

Diagnosis help

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

48

DTC: P0508 Idle speed regulator control circuit voltage is too low

No.

Operating steps

Result Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”.

Next step

Yes

Next step

2

Take off the idle regulator joint and Check the resistance

value between idle speed regulator pin A and pin D, pin B

and pin C if it is around 53±5.3Ω when it is 20℃.

No

Replace step

motor

Yes

Repair or

replace cable

3

Check if there is short circuit to ground between the circuits

of idle speed regulator joint pin A, B, C, D and ECU pin

No. 65, No.66, No.67. No.64.

No

Diagnosis help

DTC: P0509 Idle speed regulator control circuit voltage is too high

No.

Operating steps

Result Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”.

Next step

Yes

Next step

2

Take off the idle regulator joint and check the resistance

value by multimeter separately between idle speed regulator

pin A and pin D, pin B and pin C if it is around 53±5.3Ω

when it is 20℃.

No

Replace step

motor

Yes

Repair or

replace cable

3

Check using multimeter separately if there is short circuit to

power supply between the circuits of idle speed regulator

joint pin A, B, C, D and ECU pin No. 65, No.66, No.67.

No.64.

No

Diagnosis help

DTC: P0511 Idle speed regulator 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

Next step

2

Take off the idle regulator joint and check the resistance

value by multimeter separately between idle speed

regulator pin A and pin D, pin B and pin C if it is around

53±5.3Ω when it is 20℃.

No

Replace step

motor

Yes

Repair or

replace cable

3

Check using multimeter separately if there is open circuit

between the circuits of idle speed regulator joint pin A, B,

C, D and ECU pin No. 65, No.66, No.67. No.64.

No

Diagnosis help

DTC: P0560 System voltage signal unreasonable

No.

Operating steps

Result Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”.

Next step

Yes

Next step

2

Check the accumulator voltage by multimeter if it is around

12V.

No

Replace

accumulator

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

49

Yes

Repair or

replace cable

3

Check if there is open circuit or short circuit to ground

between the circuits of ECU pin No.44, No.45, No.63 and

main relay pin No.87.

No

Next step

Yes

Next step

4

Start the engine and check if the entire generator recharging

voltage is around 9-16V at the different engine speed.

No

Replace

generator

Yes

Diagnosis help

5

Check the engine cable harness contact position if it is in

good conditions.

No

Repair or

replace cable

DTC: P0562 System voltage is too low

No.

Operating steps

Result Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”.

Next step

Yes

Next step

2

Check the accumulator voltage by the multimeter and

observe if it is around 12V.

No

Replace

accumulator

Yes

Repair or

replace cable

3

Check if the resistance is over big between the circuits of
ECU pin No.44, No.45, No.63 and main relay pin No.87.

No

Next step

Yes

Next step

4

Start the engine and check if the entire generator recharging

voltage is around 9-16V at the different engine speed.

No

Replace

generator

Yes

Diagnosis help

5

Check the engine cable harness contact position if it is in

good conditions.

No

Repair or

replace cable

DTC: P0563 System voltage is too high

No.

Operating steps

Resu

lt

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”.

Next step

Yes

Next step

2

Check the accumulator voltage by the multimeter and

observe if it is around 12V.

No

Replace

accumulator

Yes

Next step

3

Start the engine and check if the entire generator

recharging voltage is around 9-16V at the different engine

speed.

No

Replace generator

Yes

Diagnosis help

4

Check the engine cable harness contact position if it is in

good conditions.

No

Repair or replace

cable

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

50

DTC: P0601 ECU testing code failure

No.

Operating steps

Result

Follow up steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”.

Next step

Yes

Next step

2

Clean up the DTC and check the failure once again if it

is a steady failure.

No

System if

correct

3

Replace ECU

Finish

DTC: P0602 ECU diagnosis data ID code failure

No.

Operating steps

Result

Follow up

steps

1

Connect the diagnostic tester and commutator, put the

ignition switch to “ON”.

Next step

Yes

Next step

2

Clean up the DTC and check the failure once again if it is

a steady failure.

No

System if

correct

3

Replace ECU

Finish

DTC: P0645 Air conditioner compressor 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 air conditioner compressor relay; put ignition

switch to “ON”; check the voltage value between relay

power supply ends that relay pin No.30, No.85 and

power cathode and observe if it is around 12V.

No

Next step

Yes

Repair or

replace

cable

3

Check if there is open circuit or short circuit to ground

of the relay power supplying ends circuit.

No

To step

No.2

Yes

Replace

relay

4

Check the voltage value by the multimeter between air

conditioner compressor relay control ends that is relay

pin No.86 and power cathode and observe if it is around

3.7V.

No

Next step

Yes

Repair or

replace

cable

5

Check if there is open circuit between the circuit of air

conditioner compressor relay control ends that is relay

pin No.86 and ECU pin No.70.

No

Diagnosis

help