Chery Tiggo 5 (T21). Manual - part 321

30–

16

30

a. Using X-431 3G diagnostic tester, read the EPS DTC.
b. Check if DTC C1901or C1902 still exists.

9

Check for DTCs

Replace EPS booster assembly

NG

The system is operating normally.
Reassemble the vehicle and perform a road test to confirm that the malfunction reported by the 
customer has been repaired.

OK

30–

17

30

DTC

C1910

IGN Voltage Error

ET21300030

BATTERY

R

R

B

MF09

80A

7.5A

RF07

7

A1

B1

IGNITION SWITCH
    ON OR START

INSTRUMENT
PANEL 
FUSE AND 
RELAY BOX

EPS

A2

B1

B2

B3

B4

B5

B6

B7

B8

B9

B10

1

2

3

4

5

6

7

8

9 10 11 12

13

85

85

87

87 30

87 30

30

86

86

85

86

14 15 16 17 18 19 20 21 22 23 24

25

27

26

B

I-007

B

I-057

I-007

L

E-077

A1

A2

E-077

E-081

E-064

EPS 
POWER

E-064

I-057

30–

18

30

Diagnosis Procedure

a. Turn ignition switch to LOCK.
b. Check EPS ground point E-081.

a. Disconnect two EPS connectors.
b. Check connectors.

DTC

DTC Definition

Possible causes

C1910

IGN Voltage Error

 Fuse
 Wire harness or connector
 EPS booster assembly

CAUTION

 When performing the circuit diagnosis and test, always refer to the circuit diagram for the specific circuit 

and the component information.

1

Check EPS ground point

Repair or replace ground wire harness or 
ground point

NG

2

Check EPS connector

OK

Repair or replace EPS connector

NG

OK

30–

19

30

a. Measure voltage between terminal B1 of EPS connector 

B I-057 and body ground.

a. Unplug EPS fuse RF07 (7.5 A) from instrument panel fuse and relay box.
b. Check resistance of fuse.

Standard resistance: less than 1 Ω

3

Check EPS ignition switch voltage

E-081

I-057

B1

B2

B3

B4

B5

B6

B7

B8

B9

B10

-

+

V

RT21305004

Multimeter 

Connection

Condition

Specified 

Condition

I-057 (B1) - Body 

ground

Ignition switch ON

11 to 14 V

Go to step 8

OK

4

Check EPS fuse

NG

Replace fuse

NG

OK