
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
±
5.3
Ω
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
±
5.3
Ω
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
±
5.3
Ω
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
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Summary of Contents for A21 2005
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