Chery A11. Manual - part 133

Chery                        SQR7160 series sedan ABS system－fault diagnostic and repairing 

 

 

 

 

 

NO 

Sensor installed correctly?

Reinstall sensor. 

YES 

Check sensor output voltage

Not normal

Check each sensor 

Replace 

Normal

Normal 

Not normal

Repair or replace 

Normal

Check ABS ECU socket and

central connector 

Not normal 

Normal

NO

Go to INTERMITTENT

FAULT DIAGNOSIS   

YES

Repair wiring harness 

or connector 

No normal

Replace ABS ECU 

YES

Remove ABS ECU. 

Check if resistance between

following terminals is within

1.0~1.3 KOhm? 

LF: 1-2 

RF: 19-20 

LR: 5-6 

RR: 22-23 

Wiggling sensor wiring harness

and connector while measuring. 

Does fault appear again? 

Repair connector 

Check wheel bearing gap 

Replace 

Not normal

Check each sensor gear ring

Not normal

Normal

Perform HCU DIAGNOSTIC
using scan tool 

Not normal

Replace ABS ECU 

 

 

 

 

 

 

 

20 

 

 

 

 

 

4 

Long Brake Pedal Travel 

Possible Causes 

［Note］Visually inspect if there is an external leakage or mechanical 

problem. Check if there is air in system by bleeding method. Check if 

normally closed valve exist a leakage problem using haydraulic unit function 

on scan tool.   

●brake fluid leakage 

●normally closed valve leakage 

●there is air in system 

●brake rotor heavily worn 

●manual brake misadjusted 

 

 

Visually inspect if fitting leaking. 

NOT NORMAL

Tignten fitting to specified torque. 

NORMAL

NOT NORMAL

Replace brake rotor. 

Check if brake rotor worn? 

NORMAL

NOT NORMAL

Replace manual brake adjuster unit. 

Check manual brake adjuster unit. 

NORMAL

Bleeding check 

NORMAL 

NOT NORMAL

Repeat bleeding procedures 

Check if there is a normally closed valve

leakage using HCU DIAGNOSTIC

FUNCTION on scan tool. 

NOT NORMAL Replace HCU 

  (Hydraulic Controlled Unit) 

21 

Chery                        SQR7160 series sedan ABS system－fault diagnostic and repairing 

 

Chery                        SQR7160 series sedan ABS system－fault diagnostic and repairing 

 

 

 

 

 

5 

Depressing Brake Pedel Need Strong Force 

Possible Causes 

［Note］  Check booster and brake pedal travel using conventional methods.

Normally open valve problem can be checked by hydraulic unit diagnostic 

function test on scan tool.   

●booster problem 

●normally open valve problem 

 

 
 

NORMAL

NOT NORMAL

Check normally open valve using HCU

DIAGNOSTIC function on scan tool. 

Replace HCU   

(Hydraulic controlled unit) 

Check booster and pedal travel using conventional brake methods. 

22 

 

 

 

 

 

 

6 

No Diagnostic Code Output (No communication with scan tool) 

Possible Causes 

［

［Note］When no communication with scan tool, it may be caused by open 

ABS ECU power and diagnostic circuit.   

● blown fuse 

●broken diagnostic cable and loose 

connector 

●defective ABS ECU 

●scan tool problem 

 

 

 

Can scan tool communicate with 

  MK 20 ABS ECU on other vehicle?

Scan tool problem. Repair it and

check again. 

Check ABS voltage supply fuse.

Replace fuse.

Is there information displayed 

on scan tool screen? 

Remove ABS ECU connector. 

Check ABS ECU terminal 13 and

diagnostic socket 

  (terminal 7 in scan tool). 

Check diagnostic socket voltage

and ground wire, diagnostic wire

and connection. Normal? 

Repair diagnostic socket   

or ABS wiring harness. 

NO

YES 

NOT  OKAY

OKAY 

NO 

NO 

Repair socket 

 Connector 

  or wiring harness. 

YES 

NO 

23 

Chery                        SQR7160 series sedan ABS system－fault diagnostic and repairing