Chery T21 2014 Service Manual page 242

06 - SQR484F ENGINE MANAGEMENT SYSTEM
Diagnosis Procedure
1
Check ECM ground point
a. Turn ignition switch to LOCK.
b. Check ECM grounds E-026 and E-028
Repair or replace ground wire harness or
NG
ground point
2
Check downstream oxygen sensor connector
06
a. Disconnect downstream oxygen sensor connector.
b. Check downstream oxygen sensor connector.
Repair or replace connector
NG
3
Check downstream oxygen sensor signal
a. Connect downstream oxygen sensor connector E-043.
b. Turn ignition switch to ON, start the engine and idle it for
about 3 minutes.
c. Using diagnostic tester, measure downstream oxygen
sensor signal voltage, or using multimeter, measure
voltage between terminals 2 and 1 of connector E-043.
Multimeter
Connection
E-043 (2) - E-043
(1)
Go to step 7
OK
78
06–
(See page
Specified
Condition
Condition
Fluctuates slightly
Engine running
at about 0.45 V
06-18).
Datastream
Datastream name
ISO15031_PID03a
relative air mass (calc.load value) acc. To SAE J1979
Air mass flow
output voltage oxygen sensor downstream catalyst
relative air charge
Chery Automobile Co., Ltd.
OK
RT21060040
OK
Value Unit
Close loop,u
sing oxygen
sensor(s) as
feedback for
fuel control
23.83 %
8 kg/h
0.46 V
17.25 %
RT21060140
NG