Chery Tiggo 5 (T21). Service manual — part 273
25–
25
25
a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Disconnect the ABS control module assembly connector
E-085.
d. Using a digital multimeter, check for continuity between
ABS control module assembly terminal 13, 38 and body
ground to check if the system ground circuit is normal
according to the table below.
Standard Condition
a. Use X-431 3G diagnostic tester to clear the DTC.
b. Start the engine.
c. Drive the vehicle at 15 km/h or more, read the ABS control module assembly DTC again with X-431 3G
diagnostic tester.
d. Check if the same DTC is output.
5
Check wire harness and connector (ABS control module assembly - body ground)
OK
RT21250210
E-085
13
12 11 10 9 8 7 6 5 4 3 2
24 23 22 21 20 19 18 17 16 15 14
37 36 35 34 33 32 31 30 29 28 27 26
1
38
25
-
+
Multimeter
Connection
Condition
Specified
Condition
E-085 (13) - Body
ground
Always
Continuity
E-085 (38) - Body
ground
Always
Continuity
Repair or replace engine compartment
wire harness and connector
NG
6
Reconfirm DTCs
OK
System operates normally
NO
Replace ABS control module assembly
YES
25–
26
25
DTC
C0020-04 ABS Pump Motor Control
ET21250050
BATTERY
ABS
CONTROL
MODULE
1
MF01
40A
R
13
12 11 10 9 8 7 6 5 4 3 2
24 23 22 21 20 19 18 17 16 15 14
37 36 35 34 33 32 31 30 29 28 27 26
1
38
25
B
E-085
E-085
38
13
Br
B
E-042
25–
27
25
Self-diagnosis Detection Logic
Diagnosis Procedure
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.
DTC Code
DTC Definitions
DTC Detection
Conditions
Possible Cause
C0020-04
ABS Pump Motor
Control
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
monitor still cannot
detect the voltage
signal after return
pump motor relay
operates for 60 ms.
3. Return pump
monitor detects the
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.
Fuse malfunction
Pump motor has poor ground
connection
System overheat protection
Pump motor power supply is abnormal
Pump motor relay malfunction.
Pump motor malfunction
CAUTION
When performing electrical equipment diagnosis and test, always refer to the circuit diagram for related
circuit and component information.
1
Check for DTCs
Problem indicated by DTC is intermittent
(system overheat protection)
NO
25–
28
25
a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Remove the ABS fuse MF-01 (40 A) from the engine compartment fuse and relay box.
d. Check if the fuse is blown.
Use the circuit diagram as a guide to perform the following procedures:
Turn ignition switch to LOCK.
Disconnect the negative battery cable.
Disconnect the ABS control module assembly connector E-085.
Check if the wire harnesses are worn, pierced, pinched or partially broken.
Look for broken, bent, protruded or corroded terminals.
Check if related connector pins are in good condition.
a. Connect the negative battery cable.
b. Turn ignition switch to LOCK.
c. Disconnect the ABS control module assembly connector
E-085.
d. Using a digital multimeter, measure the voltage between
ABS control module assembly terminal 1 and body
ground to check if the power supply circuit is normal
according to the table below.
Standard Voltage
2
Check ABS fuse
YES
Replace ABS fuse
NG
3
Check wire harness and connector
OK
Repair or replace engine compartment
wire harness and connector
NG
4
Check wire harness and connector (ABS control module assembly - battery)
OK
RT21250220
-
+
V
E-085
13
12 11 10 9 8 7 6 5 4 3 2
24 23 22 21 20 19 18 17 16 15 14
37 36 35 34 33 32 31 30 29 28 27 26
1
38
25
Multimeter
Connection
Condition
Specified
Condition
E-085 (1) - Body
ground
Always
9 to 16 V
Repair or replace engine compartment
wire harness and connector
NG
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