Chery B11. Manual — part 95

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Power supply

Oil return
solenoi

d

valve

Oil release
solenoid valve

Oil return
solenoid valve

System
relay

1. Description of circuit
Solenoid valve relay is an inalienable
part of EBCM. Battery voltage is
uninterruptedly transmitted to relay
switch through Terminal A and B. When
the ignition switch is on, the battery
voltage from Terminal A11 can be
provided to the relay coil. Then EBCM
will ground the relay coil circuit, turn on
the relay and provide battery voltage to

the solenoid valve and motor. So long as
the ignition switch is on, the relay will
remain on. Otherwise, the
troubleshooting code will be set up to
switch off the relay.

2. Conditions for setting up
troubleshooting codes
When the ignition switch is on and the
EBCM instructs the relay to turn on, if
the ignition voltage is bigger than 10.5V
and the voltage reduction of the relay
switch is less than 8V within ¼ second,
then troubleshooting code C0014 will
appear.
3. Actions to be taken for setting up
troubleshooting codes
Solenoid valve is instructed to be off and
there is no battery voltage on the
solenoid valves and pump motors.
ABS is off and ABS alarm lamp is on.
4. Conditions for clearing
troubleshooting codes

If the conditions for setting up
troubleshooting codes are gone,
corresponding scanning tools can be
used to clear the troubleshooting codes.
If any troubleshooting codes do not
appear for continuous 100 cycles
running, they can be eliminated from the
database.
5. Assistance to troubleshooting
Typical causes of troubleshooting code
C0014 include:
(1) Low battery voltage or discharged
battery
(2) Loosened or rusted battery terminals
(3) Ground fault of engine from battery
side
(4) Bad contact or loosening of ABS
fuse

(5) Bad contact of EBCM Terminals
A11, A, B, C
(6) Undervoltage of EBCM Terminal A
and/or B

(7) Internal failure of EBCM

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
6

2

1. Carry out a load test on the battery.
Refer to the provisions on battery in
the maintenance manual.
2. Check the charging coefficient.
Refer to the provisions on charger and
charging system in the maintenance
manual
3. Carry out parasitic load test.
Are the tests passed?

The battery must
be able to maintain
a voltage of over
9.6V for as long as
10 seconds
Not bigger than
30mA

To Step
3

To Step
7

3

1. Shut off engine
2. Detach the battery anode and
cathode
3. Detach the wire harness from the
EBCM
4. Check if the following contact is all
right;
·Battery connection
·Negative cable to the engine block
and chasis
·Positive cable to the starter solenoid
valve and/or the junction box
·EBCM Terminal A11, A, B, C
·EBCM grounding wire connected to
the chasis grounding
Are the above contacts all right?

To Step
4

To Step 8

4

1. EBCM is still detached
2. Battery cable remains detached
3. Connect one ohmmeter between
EBCM Terminal C and EBCM wire
harness and the battery cable cathode
Is the resistance within the range
required

Less than
2ohm

To Step
5

To Step 9

5

1. Reconnect the battery cable
2. EBCM remains detached
3. Ignite
4. Measure the voltages on EBCM
wire harness Terminal A11, A and B

Storage
battery
voltage

To Step
11

To Step 10

with a voltmeter.
Are the voltages of the aforesaid three
terminals within the range required?

6

Check the diagnostic circuit

7

Replace the charging system
and/or
recharge the battery/replace the battery
and/or
identify and repair the cause of too
many parasitic shifting

8

Repair the terminals and/or
connections as the case may require

9

Identify the cause of over-resistance
between battery cathode cable and
EBCM wire harness connector and fix
the problem.

10

Identify the cause of undervoltage of
EBCM terminals and fix the problem.

11 Replace

EBCM

Two. C0017 Ground fault circuit of pump motor

Ignition
switch

Power supply

Solenoid valve relay

Oil pump motor

Electronic brake control

Brake pressure modulator

1. Description of circuit
The pump motor is incorporated in the
BPMV and grounded through Terminal
D of EBCM.

2. Conditions for setting up
troubleshooting codes

C0017 can only be set up with the
ignition switch turned on. The pump
motor is turned off and the EBCM
detects the ground short circuit of the
pump motor.

3. Actions to be taken during setup of
troubleshooting codes
Switch off the solenoid valve relay and
cut off the power supply to pump motor
and solenoid valve.
Save troubleshooting code C0017.
Cut off ABS and turn on ABS alarm
lamp.

4. Conditions for clearing
troubleshooting codes
If the conditions for setting up
troubleshooting code C0017 are gone,
corresponding scanning tools can be
used to clear the troubleshooting code.

If the troubleshooting code does not
appear for 100 ignition cycles running, it
can be eliminated from the database.

5. Assistance to troubleshooting
Typical causes of troubleshooting code
C0017 include:
(1) BPMV trouble
(2) EBCM trouble

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 4

2

1. Shut off engine
2. Detach the EBCM wire harness from
the EBCM.
3. Unfix the EBCM from the BPMV.
4. Check if the connector between
EBCM and BPMV suffers any damage,
rust, bad contact or overflowing brake
fluid.
Are the connectors and terminals all
right? Is there any brake fluid in the
engine room? Is there any damage or
rust？

To Step 3

To Step 5

3

1. Connect one ohmmeter between
BPMV Terminal 1 and car body
grounding circuit and measure the
resistance
2. Connect one ohmmeter between
BPMV Terminal 1 and car body
grounding circuit and notice if the two
resistance values are within the range
required.

OL (open
circuit)

To Step 6

To Step 7

4

Check the diagnostic circuit

5

1. In the case of damage and/or rust,
replace the EBCM and/or BPMV if
necessary.