Chery A15. Instruction - page 40
Diagnostic trouble code: P0500 “Malfunction of improper speed signal”
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
Check and service
the ABS system.
2
For the vehicles equipped with ABS
system, verify that there is a diagnostic
trouble code designed for ABS system.
No
Proceed to next
step.
Yes
Proceed to next
step.
3
Verify that the indicating needle of
speedometer works properly.
No
Check and service
the instrument
circuit.
Yes
Proceed to next
step.
4
Verify that the speed sensor works
properly.
No
Replace the speed
sensor.
Yes
Repair or replace
the wiring harness.
5
Verify that the circuit between the signal
cable of speed sensor and 59# pin of ECU
is open, or is short to power supply or to
ground.
No
Refer to diagnosis
help.
G-48
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.
G-49
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.
G-50
Diagnostic trouble code: P0508 “Undervoltage in control circuit of idle speed
regulator”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
Connect the diagnostic tester and adaptor,
and turn the ignition switch to “ON”
position.
1
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.
G-51