Chery A21 2005, Service Manual, Page: 367 / 475

CHERY
·
A21 SERVICE MANUAL ENGINE EFI SYSTEM
44
DTC: P0343 Much higher voltage of the phase sensor
No. Operating steps Result Follow up steps
1
Connect the diagnostic tester and commutator, put the
ignition switch to
“
ON
”
Next step
Yes To step No.4
2
Take off the phase sensor joint from the cable; check
the voltage value by multimeter between phase sensor
joint pin No.3 and No.1; and observe 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
between circuit of phase sensor joint pin No.3 and main
relay pin No.87; check if there is bad contact of phase
sensor connector No.1.
No Next step
Yes To step 6
4
Check the voltage if it is around 9.9V between phase
sensor joint pin No.2 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 phase sensor
joint pin No.2 and ECU pin No.79. No Next step
Yes Diagnosis help
6
Check the camshaft signal disc if it is in good
conditions.
No
Replace signal
disc
DTC: P0443 Canister control valve drive grade 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 To step No.4
2
Take off the canister control valve joint from the cable;
check the voltage value by multimeter between this
joint pin No.1 and power supply cathode; and observe
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 canister control valve power supply ends circuit.
No To step No.2
Yes Next step
4
Check the resistance value if it is around 22-30
Ω
when
it is 20
℃
between canister control valve pin No.1 and
pin No.2.
No Replace the valve
Yes Diagnosis help
5
Check the voltage if it is around 3.7V between canister
control valve joint pin No.1 and power supply cathode.
No Next step
Yes
Repair or replace
cable 6
Check if there is open circuit between the circuit of
canister joint pin No.2 and ECU pin No. 46.
No Diagnosis help
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