Chery B11. Manual - part 99

 
 
 
Seven. C0024 Rear right wheel speed 
sensor input signal = 0 
 
 
 
 
 
1. 

Description of circuit 
The wheel speed sensor will create an 
AC voltage that increases with the 
increase of wheel speed. EBCM then 
calculates the wheel speed on the basis 
of the AC signal frequency. The speed 
sensor is connected to the EBCM by a 
twisted pair which can reduce the noise 
vulnerability of troubleshooting codes.  
 
2. Conditions for setup of 
troubleshooting codes 
The following conditions will have to be 
met for the setup of C0024:  
(1) C0032, C0033, C0034 or C0035 is 
not current.  
(2) ABS does not work.  
(3) Braking switch is on.  
(4) Rear right wheel speed is 0, and the 
speeds of other wheels are bigger than 
8km/h (5mile/h) for at least 2.5 seconds.  
 
3. Actions to be taken for setup of 
troubleshooting codes 
(1) The electromagnetic relay is turned 
off and pump motor and solenoid are 
disconnected with the power source.  
(2) Save DTC C0024.  
(3) ABS is disabled and ABS alarm 
lamp is on.  
 

4. Conditions for clearing 
troubleshooting codes 
(1) If the conditions for setting up 
troubleshooting code C0024 are gone, 
corresponding scanning tools can be 

used to clear the troubleshooting code.  

Wheel speed sensor

Straddling 
wire  

Car body wire harness 

Gear 
ring 

(2) If the troubleshooting code does not 
appear for 100 driving cycles running, it 
can be eliminated from the database.  
 
5. Assistance to troubleshooting 
In the case of any interrupted 
troubleshooting code, please thoroughly 
check the wiring and connectors, which 
shall include:  
(1) Unfix guard pipes and check if the 
wiring is damaged, short circuited and 
polluted.  
(2) Check if the terminals are deformed 
and/or damaged.  
(3) Check the contact (fastness) of 
terminals by the spare male/female 
terminals.  
(4) Check if the wire terminals are 
correct by unfixing terminals from the 
connector.  
If the driver complains that the ABS 
alarm lamp only illuminates when there 
is a change in environment moisture 
(rain, snow and car washing), please 
thoroughly check if any wheel speed 
sensor is soaked. If the troubleshooting 
code is not current, then simulate the 
impact of water soaking. Follow the 
following steps: spray 5% brine on 
suspected area. Then trial run the car at a 

speed of over 24km/h (15m/h) on 
various road surfaces (e.g. bumpy or 
curved road, etc). If any troubleshooting 
code appears, then replace the suspected 
wire harness and/or sensor.  
Make sure that the car is under room 
temperature when measuring wheel 
speed sensor resistance as the resistance 
will increase with temperature rise.  

Any failure to carefully and thoroughly 
follow the above steps will possibly 
result in wrong diagnosis, unnecessary 
component replacement and 
reoccurrence of DTC C0024.  
 
 
 

 
6. Diagnostic steps
 

Step Diagnostic 

action 

Expecte
d value 

Yes No 

1 

If the checking of diagnostic circuit has been finished 

 

To 
Step 2

To Step 
12 

2 

1. Shut off engine 
2. Check if the rear right wheel speed sensor, straddling 
wire harness and gear ring suffers any physical damage.
Is there any physical damage?  

 

To 
Step 
13 

To Step 
3 

3 

Is DTC C0035 to be set as a current or historic code?  

 

To 
Step 
14 

To Step 
4 

4 

1. Connect the scanning device and select the data list 
2. Monitor wheel speed sensor 
3. Trial run the car at a speed of 24km/h (15mile/h) and 
then gradually lower the car speed to zero. Repeat it for 
a couple of times. 
Is C0024 reset or if the rear right wheel speed suddenly 
lowers to zero before the car fully stops?  

 

To 
Step 5

To Step 
15 

5 

1. Shut off engine 
2. Lift and properly support the car. 
3. Detach the EBCM wire harness from the EBCM 
4. Connect a voltmeter to the EBCM wire harness 
terminals A05 and A06.  
5. Select AC mV scale 
6. Rotate the rear right wheel while observing the 
voltmeter (the voltage shall increase with the speed 
increase) 
Is the AC voltage within the range required?  

At least 
100mV 

To 
Step 
16 

To Step 
6 

6 

1. Detach the rear right straddling wire harness from the 
rear right wheel speed sensor.  
2. Connect the ohmmeter to the rear right wheel speed 
sensor terminals A and B.  
Is the resistance within the range required?  

800-
1,600oh
m 
(resistan
ce will 
increase 
with 
temperat
ure rise 

To 
Step 7

To Step 
17 

7 

1. Rear right straddling wire harness still remains 
detached from the rear right wheel speed sensor. 
2. Connect the voltmeter to the rear right wheel speed 
sensor terminals A and B. 
3. Select AC mV scale.  
4. Rotate the rear right wheel while observing the 
voltmeter (the voltage shall increase with the speed 
increase) 
Is the AC voltage within the range required? 

At least 
100mV 

To 
Step 8

To Step 
17 

 
 
 
 

 

8 

1. Detach the rear right straddling wire harness from the 
ABS car body wire harness.  
2. EBCM wire harness remains detached from the 
EBCM.  
3. Connect an ohmmeter to the EBCM terminals A05 
and A06.  
Is the resistance within the range required? 

OL 
open 
circuit 

To 
Step 9

To Step 
18 

9 

1. EBCM wire harness remains detached from the 
EBCM.  
2. Rear right straddling wire harness remains detached 
from the ABS car body wire harness.  
3. Connect an ohmmeter to the EBCM terminal A05 and 
then to the ABS car body wire harness terminal A.  
Is the resistance within the range required? 

Less 
than 
2ohm 

To 
Step 
10 

To Step 
19 

10 

1. EBCM wire harness remains detached from the 
EBCM.  
2. Detach the rear right straddling wire harness from the 
ABS car body wire harness.  
3. Connect an ohmmeter to the EBCM terminal A06 and 
then to the ABS car body wire harness terminal B.  
Is the resistance within the range required? 

Less 
than 
2ohm 

To 
Step 
11 

To Step 
20 

11 

1. Replace rear right wheel speed sensor straddling wire 
harness.  
2. Trial run the car at various speeds on various road 
surfaces.  
Is C0035 reset?  

 

To 
Step 
16 

Car 
mainten
ance 

12 

Check the diagnostic circuit before the test is carried 
out.  

 

 

 

13 

Repair the rear right wheel speed sensor, straddling wire 
harness and/or damaged ring with gear rings.  

 

 

 

14 

Diagnose DTC C0035 before carrying out the steps in 
the table 

 

 

 

15 

DTC C0024 is intermittent. Refer to “Assistance to 
troubleshooting”. 

 

 

 

16 

Replace the EBCM.  

 

 

 

17 

Replace the rear right wheel speed sensor 

 

 

 

18 

Identify and repair the short circuit between two 
circuits.  

 

 

 

19 

Repair the open circuit or high resistance between 
terminals A05 and A.  

 

 

 

20 

Repair the open circuit or high resistance between 
terminals A06 and B.