Chery A21 2005, Service Manual, Page: 369 / 475

CHERY
·
A21 SERVICE MANUAL ENGINE EFI SYSTEM
46
DTC: P0480 Air conditioner condenser cooling fan relay control circuit failure
No. Operating steps Result
Follow up
steps
1
Connect the diagnostic tester and commutator, put the
ignition switch to
“
OFF
”
Next step
Yes
To step
No.4
2
Take off the air conditioner condenser cooling fan relay;
put the ignition switch to
“
ON
”
position, and check the
voltage value by multimeter between this relay power
supply end that is relay pin No.30, No.85 and power
supply cathode if it is around 12V.
No Next step
Yes
Repair or
replace the
cable 3
Check if there is open circuit or short circuit to ground of
the air conditioner cooling fan relay power supply end
circuit.
No
To step
No.2
Yes
Replace
relay
4
Check the voltage by the multimeter if it is around 3.7V
between air conditioner condenser cooling fan relay
control ends that is relay pin No.86 and power supply
cathode.
No Next step
Yes
Repair or
replace
cable 5
Check if there is open circuit or short circuit to power
supply or to ground between the circuit of relay control
end pin No.86 and ECU pin No. 50.
No
Diagnosis
help
DTC: P0500 Unreasonable failure of speed signal
No. Operating steps Result Follow up steps
1
Connect the diagnostic tester and commutator, put the
ignition switch to
“
OFF
”
.
Next step
Yes
Check and
repair ABS
system
2
If it is a vehicle with ABS, please check if there is
ABS DTC.
No Next step
Yes Next step
3 Check if the speedometer finger works normally.
No
Check the
speedometer
line
Yes Next step
4 Check if the speed sensor works normally.
No
Replace speed
sensor
Yes
Repair or
replace cable 5
Check if there is open circuit or short circuit to power
supply or to ground between the circuit of speed
sensor and ECU pin No. 59.
No Diagnosis help
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