Chery A21 2005 Service Manual page 365

CHERY·A21 SERVICE MANUAL
No.
Connect the diagnostic tester and commutator, put the
1
Take off the knock sensor joint from the cable; check
the resistance value by multimeter between knock
2
sensor connector No.1and No.2 and observe if it is
Check if there is open circuit or short circuit to ground
3 or to power supply between circuit of knock sensor
Replace the knock sensor according to the regulation;
try running the vehicle and make the engine speed
4
exceed 2200rpm. Check if the DTC P0325 will appear
DTC: P0335 Crank shaft position sensor signal failure
No.
Connect the diagnostic tester and commutator, put the
1
Take off the speed sensor joint from the cable; check
the resistance value by multimeter between speed
2
sensor connector No.2and No.3 and observe if it is
Check if there is open circuit or short circuit to ground
3 or to power supply between circuit of speed sensor
4
DTC: P0336 Crank shaft position sensor signal unreasonable failure
No.
Connect the diagnostic tester and commutator, put
1
Take off the speed sensor joint from the cable; check
the resistance value by multimeter between speed
2
sensor connector No.2and No.3 and observe if it is
Check if there is open circuit or short circuit to
ground or to power supply between circuit of speed
3
sensor joint pin No.2, No.3 and ECU pin No.34, No.
Check the flywheel signal disc if it is in good
4
PDF created with pdfFactory Pro trial version
Operating steps
ignition switch to "OFF"
1MΩ.
joint No.1, No.2 and ECU pin No.19, No. 20
again.
Operating steps
ignition switch to "OFF"
around 770-950MΩwhen it is 20℃
joint No.2, No.3 and ECU pin No.34, No. 15
Check the flywheel signal disc if it is in good
conditions.
Operating steps
the ignition switch to "OFF"
around 770-950MΩwhen it is 20℃
15
conditions.
42
www.pdffactory.com
ENGINE EFI SYSTEM
Result Follow up steps
Next step
Yes Next step
No Change sensor
Repair or replace
Yes
the cable
No To step No.2
Yes Diagnosis help
Check if it is a
No
occasional fault
Result Follow up steps
Next step
Yes Next step
No Replace sensor
Repair or replace
Yes
the cable
No Next step
Yes Diagnosis help
Replace signal
No
disc
Result Follow up steps
Next step
Yes Next step
No Replace sensor
Repair or replace the
Yes
cable
No Next step
Yes Diagnosis help
No Replace signal disc