CHERY·A21 SERVICE MANUAL ENGINE EFI SYSTEM
51
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 cable3
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 cable3
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
