Chery T21 2014 Service Manual page 274

06 - SQR484F ENGINE MANAGEMENT SYSTEM
Replace wire harness or connector
NG
(engine speed sensor - ECM)
7
Install a normal engine speed sensor and observe signal waveform
a. Install a normal engine speed sensor.
b. Connect engine speed sensor connector.
c. Turn ignition switch to ON, start the engine and observe the signal waveform of the engine speed sensor
with an oscilloscope.
Replace engine speed sensor
OK
06
8
Check flywheel gear ring
a. Turn crankshaft, and check crankshaft and flywheel gear ring for damage and foreign matter, etc. that
cause signal incorrectness.
Clear off debris and clean flywheel gear
NG
ring. Replace flywheel if necessary 
(See page
9
Check for DTCs
a. Use X-431 3G diagnostic tester to read the ECM DTC.
b. Refer to "DTC Confirmation Procedure".
c. Check if DTC P0322-00 still exists.
Replace ECM
NG
System is operating normally.
Reassemble vehicle and perform a road test to confirm that malfunction reported by customer has
been repaired.
110
06–
07-42)
Chery Automobile Co., Ltd.
OK
NG
OK
OK