Chery T21 2014 Service Manual page 563

Downstream Oxygen Sensor
Removal
WARNING
 Temperature of exhaust system is very high when engine is running. Before removal and installation, you
must make sure that the engine has stopped running; otherwise there is a risk of scald injury.
 Be sure to wear necessary safety equipment when repairing to prevent accidents.
 Try to prevent body paint surface from being scratched during removal and installation.
1. Turn off all the electrical equipment and ignition switch.
2. Disconnect the negative battery cable.
3. Raise the vehicle to the proper position.
4. Remove the downstream oxygen sensor.
a. Remove and disconnect the downstream oxygen
sensor connector (1) from bracket.
b. Remove the downstream oxygen sensor (arrow) from
precatalytic converter assembly.
(Tightening torque: 40 - 60 N·m)
Inspection
1. Measure resistance of downstream oxygen sensor with a
digital multimeter.
Multimeter
Condition
Connection
Pin C - Pin D
Pin A - Pin B
Pin A - Pin C
Pin A - Pin D
Pin B - Pin C
Pin B - Pin D
If result is not as specified, replace downstream oxygen sensor.
Installation
Installation is in the reverse order of removal.
Chery Automobile Co., Ltd.
Specified
Condition
20°C 7 - 11 Ω
Always No continuity
09 - SQR484F EMISSION CONTROL SYSTEM
1
+ -
09
RT21090150
D C B A
RT21090140
15
09–