Chery A18. Manual — part 52

20

3

ABS operates abnormally

Possible reason

[Explanation] It is uneasy to perform the fault
diagnosis because the problem is nearly correlative
with driving condition and ground condition. But it
is possible to perform following in condition of no
fault code record.

l

Sensor is installed incorrectly

l

Fault with wiring harness of sensor

l

Sensor is damaged

l

Annulus ring is damaged

l

Foreign matter attaches on sensor

l

Bearing of wheel is damaged

l

ABS HCU (hydraulic unit) is
damaged

l

ABS ECU (electric control unit) is
damaged

21

4

Stroke of brake pedal is too long

Possible reason

[Explanation] Check if external leakage or
mechanical fault exists by using visual mode.
Check if air existing in system by using mode of
exhausting air. Check if normally closed valve
leaks by using function test of hydraulic unit of
fault diagnosing device.

l

Brake liquid leaks

l

Normally closed valve leaks

l

Air existing in system

l

Brake disc is worn seriously

l

Adjustment of manual brake is NG

22

5

Tread pedal with too big force

Possible reason

[Explanation] Check stroke of brake pedal and strengthener in
traditional mode. And inspect fault of normally open valve by
using function test of hydraulic unit of fault diagnosing device.

l

Strengthener is NG

l

Normally open valve is

NG

23

6

No diagnosis code output (cannot

communicate with fault diagnosing device)

Possible reason

[Explanation] it is possible to be caused in
disconnection of power loop of ABS ECU or
loop of diagnosing wire.

l

Fuse is burned

l

Diagnosing

wire

is

broke

or

connector is loose

l

ABS ECU is damaged

l

Fault diagnosing device is NG