Chery T21 2014 Service Manual page 584

10 - SQR484F INTAKE SYSTEM
Electronic Throttle Assembly
On-vehicle Inspection
1. Check the electronic throttle assembly.
a. When power is off, the throttle valve plate should be in
NLP position. If you flip the valve plate by hand, it can
rotate smoothly. If sticking occurs, which indicates
internal components may be damaged, replace the
electronic throttle assembly.
b. Connect X-431 3G diagnostic tester to Data Link
Connector (DLC).
c. Turn ignition switch ON and turn on X-431 3G diagnostic
tester.
d. Read data flow on X-431 3G diagnostic tester.
 Release accelerator pedal.
Data Flow Name
Throttle potentiometer 1 signal voltage
Throttle potentiometer 2 signal voltage
10
 Depress accelerator pedal.
Data Flow Name
Throttle potentiometer 1 signal voltage
Throttle potentiometer 2 signal voltage
If result is not as specified, check wire harness, ECM or
replace electronic throttle assembly.
Removal
CAUTION
 Temperature of hood is very high when engine is running. Before removal, make sure engine has
stopped running and hood has cooled down, 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. Remove the engine trim cover assembly
4. Remove the electronic throttle assembly.
20
10–
Specification (V)
0.78
4.22
Specification (V)
4.29
0.71
(See page 10-10).
Datastream
Datastream name Value
lambda controller output 1.00
multiplicative correction of the mixture adaptation
1.03
sensor voltage from throttle potentiometer 1
0.78
sensor voltage from throttle potentiometer 2 4.22
additive correction of the mixture adaptation 0.00
Voltage PWG potentiometer 1
0.77
Voltage PWG potentiometer 2
0.38
0.75
Doubled PWG potentiometer-2 voltage
Datastream
Datastream name Value
Lambda controller output
1.00
multiplicative correction of the mixture adaptation 1.03
sensor voltage from throttle potentiometer 1
4.29
sensor voltage from throttle potentiometer 2
0.71
additive correction of the mixture adaptation
0.00
Voltage PWG potentiometer 1 4.60
Voltage PWG potentiometer 2 2.30
4.61
Doubled PWG potentiometer-2 voltage
Chery Automobile Co., Ltd.
Unit
V
V
%
V
V
V
RT21100171
Unit
V
V
%
V
V
V
RT21100172