Chery A21 2005 Service Manual page 364

CHERY·A21 SERVICE MANUAL
between 3
DTC: P0204 The 4
No.
Connect the diagnostic tester and commutator, put the
1
Take off the 4
check the voltage value between this joint pin No.1
2
and the power cathode by multimeter and observe if it
Check if there is open circuit or short circuit to ground
3
between the 4
Check the resistance value by multimeter between 4
4
cylinder injector pin No.1 and No.2, and observe if it
Check the voltage value by multimeter between 4
5
cylinder injector pin No.2 and power supply cathode,
Check if there is open circuit or short circuit to ground
6 between 4
DTC: P0230 Fuel pump control circuit failure
No.
Connect the diagnostic tester and commutator, put the
1
Take off the fuel pump relay and put ignition switch to
"ON"; check the voltage separately between fuel
2
pump relay power supply ends - that is relay pin No.
30 and No.86 and power supply cathode, and observe
Check if there is open circuit or short circuit to ground
3
Check the voltage by multimeter between fuel pump
4 relay control ends that is relay pin No. 85 and power
supply cathode and observe if it is around 3.7V.
Check if there is open circuit or short circuit to ground
5 or to power supply between relay control ends that is
DTC: P0325 Knock sensor circuit failure
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rd
cylinder injector joint pin No.2 and the
ECU pin No.7.
th
cylinder injector circuit failure
Operating steps
ignition switch to "ON"
th
cylinder injector joint from the cable,
is 12V.
th
injector joint pin No.1 and main relay.
is 11-13Ω when it is 20℃.
and observe if it is around 3.7V.
th
cylinder injector joint pin No.2 and the
ECU pin No.47.
Operating steps
ignition switch to "OFF"
if it is around 12V.
of the relay power supply ends circuit.
relay pin No.85 and ECU pin No.69.
th
th
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ENGINE EFI SYSTEM
cable
No Diagnosis help
Result Follow up steps
Next step
Yes To step No.4
No Next step
Repair or replace
Yes
the cable
No Next step
Yes Next step
No Replace injector
Yes Diagnosis help
No Next step
Repair or replace
Yes
cable
No Diagnosis help
Result Follow up steps
Next step
Yes To step No.4
No Next step
Repair or replace
Yes
the cable
No To step No.2
Replace fuel
Yes
pump relay
No Next step
Repair or replace
Yes
cable
No Diagnosis help