Chery QQ Service Manual download pdf (Page 50)

CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM

replace cablesupply or to ground between the circuit of speed

sensor and ECU pin No. 59.

No Diagnosis help

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

No. Operating steps Result Follow up steps

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”.

Next step

Yes Next step

Check if the throttle valve adjusting screw, accelerator

cable and throttle valve working in good conditions.

Carry out the

necessary

repair and

maintenance

Yes Next step

3 Check if the idle speed regulator works in good conditions.

Carry out the

necessary

repair and

maintenance

Yes Next step

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

Replace speed

sensor

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

No. Operating steps Result Follow up steps

Connect the diagnostic tester and commutator, put the

ignition switch to “OFF”

Next step

Yes Next step

Check if the throttle valve adjusting screw, accelerator

cable and throttle valve working in good conditions.

Carry out the

necessary repair

and

maintenance

Yes Next step

3 Check if the idle speed regulator works in good conditions.

Carry out the

necessary repair

and

maintenance

Yes

Carry out the

necessary repair

and

maintenance

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

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Chery QQ Service Manual Page 50

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