Chery T21 2014 Service Manual page 1123

Self-diagnosis Detection Logic
DTC Code DTC Definitions
ABS Pump Motor
C0020-04
Control
CAUTION
 When performing electrical equipment diagnosis and test, always refer to the circuit diagram for related
circuit and component information.
Diagnosis Procedure
1
Check for DTCs
a. Leave the vehicle for 5 minutes, clear and read the ABS control module assembly DTC again with X-431
3G diagnostic tester.
b. Refer to DTC Confirmation Procedure.
c. Check if the same DTC is output.
Problem indicated by DTC is intermittent
NO
(system overheat protection)
Chery Automobile Co., Ltd.
DTC Detection
Conditions
These DTCs occur
when any of the
following conditions is
met:
1. Pump motor
operates with
overload, and
temperature is too
high (over
protection).
2. Return pump
 Fuse malfunction
monitor still cannot
 Pump motor has poor ground
detect the voltage
signal after return
 System overheat protection
pump motor relay
operates for 60 ms.
 Pump motor power supply is abnormal
3. Return pump
 Pump motor relay malfunction.
monitor detects the
 Pump motor malfunction
voltage for more
than 2.5 s when
return pump motor
relay does not
operate.
4. Return pump
monitor detects that
the voltage does not
drop when return
pump motor relay
stop operating.
25 - BRAKE CONTROL SYSTEM
Possible Cause
connection
25
27
25–