Chery B11. Manual — part 98

Step Diagnostic

action

Expected
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 front 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 C0033 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 C0022 reset or if the front 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 A07 and A08.
5. Select AC mV scale
6. Rotate the front 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 front right straddling wire harness from
the front right wheel speed sensor.
2. Connect the ohmmeter to the front right wheel speed
sensor terminals A and B.
Is the resistance within the range required?

800-
1,600ohm
(resistance
will increase
with
temperature
rise

To
Step 7

To Step
17

7

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

At least
100mA

To
Step 8

To Step
17

8

1. Detach the front 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 A07
and A08.
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. Front right wire harness remains detached from the
ABS car body wire harness.
3. Connect an ohmmeter to the EBCM terminal A07 and
then to the ABS car body wire harness terminal A.

Less than
2ohm

To
Step
10

To Step
19

Six. C0023 Rear left wheel speed sensor input signal =0

Wheel speed sensor

Straddling
wire

Car body wire harness

Gear
ring

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 C0023:
(1) C0032, C0033, C0034 or C0035 is
not current.
(2) ABS does not work.
(3) Braking switch is on.
(4) Rear left 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 C0023.
(3) ABS is disabled and ABS alarm
lamp is on.

4. Conditions for clearing
troubleshooting codes
If the conditions for setting up
troubleshooting code C0023 are gone,
corresponding scanning tools can be
used to clear the troubleshooting code.
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 in carefully and thoroughly
following the above steps will possibly
result in wrong diagnosis, unnecessary
component replacement and
reoccurrence of DTC C0023.

6. Diagnostic steps

Step Diagnostic

action

Expected
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 left 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 C0034 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 C0023 reset or if the rear left 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 A03 and A04.
5. Select AC mV scale
6. Rotate the rear left 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 left straddling wire harness from the
rear left wheel speed sensor.
2. Connect the ohmmeter to the rear left wheel speed
sensor terminals A and B.
Is the resistance within the range required?

800-
1,600ohm
(resistance
will increase
with
temperature
rise

To
Step 7

To Step 17

7

1. Rear left straddling wire harness still remains
detached from the rear left wheel speed sensor.
2. Connect the ohmmeter to the rear left wheel speed
sensor terminals A and B.
3. Select AC mV scale.
4. Rotate the rear left 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 left 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 A03
and A04.
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 left straddling wire harness remains detached
from the ABS car body wire harness.
3. Connect an ohmmeter to the EBCM terminal A03 and
then to the ABS car body wire harness terminal A.

Less than
2ohm

To
Step
10

To Step 19