Chery A15 / 480 LHD model. Manual — part 91
Diagnostic trouble code: P0506 “Idle speed lower than nominal idle speed”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor,
and turn the ignition switch to “OFF”
position.
Proceed to next
step.
Yes
Proceed to next
step.
2
Verify that the adjusting screw of throttle,
accelerator pedal stay and working
condition of throttle are in good condition.
No
Carry out
necessary
Overhaul.
Yes
Proceed to next
step.
3
Verify that the working condition of idle
speed regulator is correct.
No
Carry out
necessary
Overhaul.
Yes
Carry out
necessary
Overhaul.
4
A. Verify that there is under pressure in the
fuel supplying system;
B. Verify that there is blockage in the fuel
injector;
C. Verify that there is blockage in the
exhaust system.
No
Refer to diagnosis
help.
Diagnostic trouble code: P0507 “Idle speed higher than nominal idle speed”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor,
and turn the ignition switch to “OFF”
position.
Proceed to next
step.
Yes
Proceed to next
step.
2
Verify that the adjusting screw of throttle,
accelerator pedal stay and working
condition of throttle are in good condition.
No
Carry out
necessary
Overhaul.
Yes
Proceed to next
step.
3
Verify that the working condition of idle
speed regulator is correct.
No
Carry out
necessary
Overhaul.
Yes
Carry out
necessary
Overhaul.
4
A. Verify that there is air leakage in the
system;
B. Verify that there is leakage in the fuel
injector;
C. Verify that there is over pressure in the
fuel supplying system.
No
Refer to diagnosis
help.
Diagnostic trouble code: P0508 “Undervoltage in control circuit of idle speed
regulator”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor,
and turn the ignition switch to “ON”
position.
Proceed to next
step
Yes
Proceed to next
step
2
Disconnect the connector of idle speed
regulator and inspect with multimeter to
verify that the resistances between pin A
and D, pin B and C are 53±5.3Ω under
20
.
℃
No
Replace the step
motor.
Yes
Repair or replace
the wiring harness.
3
Verify that the circuits between pin A, B,
C, and D of idle speed regulator and 65#,
66#, 67#, and 64# pin of ECU are short to
ground.
No
Refer to diagnosis
help.
Diagnostic trouble code: P0509 “Overvoltage in control circuit of idle speed
regulator”
Item
No.
Operation procedure
Inspection
results
Follow-up procedure
1
Connect the diagnostic tester and
adaptor, and turn the ignition switch to
“ON” position.
Proceed to next step
Yes
Proceed to next step
2
Disconnect the connector of idle speed
regulator and inspect with multimeter to
verify that the resistances between pin A
and D, pin B and C are 53±5.3Ω under
20
.
℃
No
Replace the step
motor.
Yes
Repair or replace the
wiring harness.
3
Verify that the circuits between pin A, B,
C, and D of idle speed regulator and 65#,
66#, 67#, and 64# pin of ECU are short
to power supply.
No
Refer to diagnosis
help.
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