Chery A21 2005, Service Manual, Page: 366 / 475

CHERY
·
A21 SERVICE MANUAL ENGINE EFI SYSTEM
43
DTC: P0340 Phase sensor signal 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 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 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: P0342 Much lower 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
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