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