Chery SQR 7160 sedan. Manual - part 3

 

 

 

 

5. MK20-I/E SYSTEM 

5.1 Checking ABS warning light 

        Check if ABS warning light is as following:   

        Ⅰ.When ignition turned ON,    ABS goes on for about 1.7 senconds，then goes off。 

        Ⅱ. If ABS warning light is not as specified, a problem is indicated and the fault code must be retrived.   

        Ⅲ. If ABS warning light does not go on after igniton turned on, repair problem referring to FAULT W/O CODE 

DIAGNOSTIC CHART.   

5.2 Reading condition information 

        After turning on scan tool, enter 03 at ADDRESS, press Q , following data will be displayed： 

    1.Example，ECU No. and Version No. 

      1JO 907 379P ABS MK20I/E 

    2. Code (Codierung) ：××××× 

    3. Factory code (WSC) ：××××× 

5.3 Retriving Fault Code 

        Enter 02 at FUNCTION SELECT, press Q, fault number will be displayed. Then press  “→”, fault code   

and related information of each fault will be listed. 

5.4 Clearing Fault Code 

        Enter 05 at FUNCTION SELECT, press Q, fault code will be cleared. If failed to clear the code, the fault is a hard 

fault. If stored code can be cleared, it indicates an intermittent fault, which can be detected only during a vehicle drive 

test.  

5.5 Fault Code Display Method 

System Problem 

Displayed Code 

Never happened before 

No fault code 

No problem so far 

(ABS warning light is off) 

Happened sometime before   

Intermittent code 

Never happened before 

Not intermittent code 

Still exist so far 

(ABS warning light is on) 

Happened sometime before 

Intermittent code AND   

Not intermittent code 

 

5 

 

 

 

6. Hydraulic Controlled Unit Diagnostic 

6.1 Hydraulic controlled unit can be diagnosed using scan tool. Follow below 
procedures after entering 03.   

 

Step Action 

Taken 

Data 

Displayed 

Resullt Under Normal 

Condition 

01  

Hydraulish ABS Pumpe V64   

(Hydraulic pump test) 

 

02 

Bremse Bestatigung 

(Depress brake pedal) 

 

03 

EVL:0V AVL：0V    Rad blockiert 

 (Normal Open Valve：0V         

Normal Closed Valve： 0V    Wheel Block?) 

Wheel Block 

04 

EVL：UBAT        AVL：0V    Rad blockiert  

(Normal Open Valve：POWER ON 

Normal Closed Valve：0V   Wheel Block?) 

Wheel Block 

05 

EVL：UBAT        AVL：UBAT        Rad frei 

(Normal Open Valve：POWER ON     

Normal Closed Valve：POWER ON   Wheel can spin 

freely) 

Wheel can spin freely; 

pedal kick back; pump 

motor running sound can 

be heard. 

06 

EVL：UBAT        AVL：0V        Rad frei 

(Normal Open Valve：POWER ON   

Normal Closed Valve：0V   Wheel can spin freely)  

Wheel 

can 

spin 

freely; 

07 

Depress Brake Pedal 

And Keep Depressed 

EVL：0V        AVL：0V    Rad blockiert 

(Normal Open Valve：0V 

Normal Closed Valve：0V    Wheel block?) 

Wheel Block,   

Pedal descent silghtly 

08 

Realse Brake Pedal 

Bremwd losen (Release Brake Pedal) 

 

 

6.2 Perform above test procedures on each wheel.     
Sequences : LF→RF→LR→RR. 

6 

 

 

 

 

 

7. Quick Fault Repairing Index 

7.1 Fault w/code check chart index 

Code 

Fault description 

Diagnosing object 

Check chart No. 

Page No. 

65535 

Electronic controlled unit 

Defective 

 

P.29 

01276 

ABS Hydraulic pump 

Inoperative motor 

1 

P.12 

00283 

LF Wheel Speed Sensor 

00285 

RF Wheel Speed Sensor 

00290 

LR Wheel Speed Sensor 

00287 

RR Wheel Speed Sensor 

Electrical and 

mechanical problem 

2，3，4 P.13，P.14，P.15 

01044 

ABS wrong programing 

 

5 

P.16 

00688 

Voltage supply terminal 30

 

6 

P.17 

01130 

ABS abnormal operating 

Unreasonable signal 

7 

P.18 

 

7.2 Fault w/o code check chart index 

Problem Sympton 

Check chart No. 

Page No. 

Igniton turned to ON position (engine off), ABS warning light is off 

1 

P.19 

After engine running, ABS warning light does not go off. 

2 

P.20 

Uneven two sides’ brake force 

Insufficient brake force 

ABS operate when slightly depress brake pedal 

(Vehicle is stationary) 

ABS operate when slightly depress brake pedal 

(Vehicle is operating) 

Abornal 

ABS operating   

Brake pedal vibrate heavily when ABS operating 

3 P.21 

Brake pedal travel too long 

4 

P.22 

Brake pedal depressing need a great force. 

5 

P.23 

No fault code output (does not communicate with scan tool). 

6 

P.24 

7 

 

 

 

 

8. ABS ECU SOCKET 

 

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