DAF LF45, LF55 Series. Manual — part 6

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1-11

EBS fault codes

EBS

DAVIE XD diagnostics manual

1

55-33

Short circuit to supply in redundancy valve
(B306), measured via pin B12 of the EBS unit

-

ABS on front axle deactivated

57-12

Incorrect ASR cut-off valve (B309) parameters
due to:
-

ASR cut-off valve connected to the EBS unit
without the EBS unit having been
programmed for an ASR cut-off valve

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on front axle, rear axle
and drawn vehicle deactivated

57-31

Interruption on pin C6 of the EBS unit, ASR cut-
off valve (B309)

-

ASR brake control deactivated

-

57-32

Short circuit to earth on pin C6 of the EBS unit,
ASR cut-off valve (B309)

-

ASR brake control deactivated

-

57-33

Short circuit to supply on pin C6 of the EBS unit,
ASR cut-off valve (B309)

-

No noticeable system limitation in EBS

61-16

The current through the front axle modulator
(B307) magnet coil measured via pins D1 and D2
of the EBS unit is incorrect due to:
-

copper short circuit in the magnet coil

-

short circuit or contact resistance between
pins D1 and D2 of the EBS unit

-

EBS pressure control on front axle
deactivated

61-55

Front axle modulator (B307) output pressure
measured on pin D6 of the EBS unit is incorrect
in relation to the current through the magnet coil
due to:
-

defective pressure sensor

-

too low a supply pressure

-

EBS pressure control on front axle
deactivated

62-42

Pressure sensor failure in front axle modulator
(B307) due to:
-

short circuit to supply on pin D6 of the EBS
unit

-

interruption on pin D3 of the EBS unit

-

short circuit to supply on pin D5 of the EBS
unit

-

Open circuit in EBS pressure control, front
axle

62-43

With a nonactivated front axle modulator, the
front axle modulator (B307) pressure sensor
output signal on pin D6 of the EBS unit is too low
or too high due to:
-

defective pressure sensor

-

no supply voltage or supply voltage too low
on pin D9 of the EBS unit

-

interruption on pin D6 of the EBS unit

-

short circuit to earth on pin D6 of the EBS
unit

-

air pressure at connection point 4 of the front
axle modulator (B307) if the foot brake valve
(F628) is not activated

-

Open circuit in EBS pressure control, front
axle

63-25

Permanent actuation of the front axle modulator
(B307) due to:
-

short circuit to supply on one side and short
circuit to earth on the other side

-

Brake remains applied to front axle

63-32

Short circuit to earth on pin D1 of the EBS unit,
front axle modulator (B307)

-

EBS pressure control on front axle
deactivated

Fault code

Fault code description with possible cause

Symptom

EBS

1-12

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EBS fault codes

1

DAVIE XD diagnostics manual

63-33

Short circuit to supply on pin D1 of the EBS unit,
front axle modulator (B307)

-

EBS pressure control on front axle
deactivated

63-34

Short circuit to earth on pin D2 of the EBS unit,
front axle modulator (B307)

-

EBS pressure control on front axle
deactivated

63-35

Short circuit to supply on pin D2 of the EBS unit,
front axle modulator (B307)

-

EBS pressure control on front axle
deactivated

63-36

Interruption on pin D1 and/or D2 of the EBS unit,
front axle modulator (B307)

-

EBS pressure control on front axle
deactivated

64-13

The EBS unit parameters for the rear axle
modulator type do not correspond with the
parameters in the rear axle modulator (D879)

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on front axle, rear axle
and drawn vehicle deactivated

64-16

Fault in the solenoid valves of the rear axle
modulator (D879)

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on rear axle
deactivated

64-51

Output pressure of the rear axle modulator
(D879) is too high

-

ABS on rear axle deactivated

64-52

Brake pressure signal difference between both
pressure sensors in rear axle modulator (D879) is
too high

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on rear axle
deactivated

64-54

No pressure sensor signal in rear axle modulator
(D879) or signal is incorrect (too high/too low)

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

Open circuit in EBS pressure control, rear
axle

64-64

CAN communication problem of the EBS unit with
the rear axle modulator (D879) via pins B1 and
B4 of the EBS unit

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on rear axle
deactivated

Supply voltage on pin B7 of the EBS unit
interrupted

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on rear axle
deactivated

-

With an interruption on pin B7, connection
points A9 and E4 inside the ECU will have a
low voltage, causing brake pedal position
sensor 2 to give no output signal, for
instance. If the measurement is performed
at B7, it will also turn out that B7 in this
situation will be internally connected to earth
in the ECU

Interrupted earth connection or contact
resistance in the earth connection of the rear axle
modulator (D879)

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on rear axle
deactivated

66-12

Incorrect drawn vehicle control valve (B308)
parameters due to:
-

drawn vehicle control valve connected to the
EBS unit without the EBS unit having been
programmed for a drawn vehicle control
valve

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

-

EBS pressure control on front axle, rear axle
and drawn vehicle deactivated

Fault code

Fault code description with possible cause

Symptom

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1-13

EBS fault codes

EBS

DAVIE XD diagnostics manual

1

66-16

The current measured by the drawn vehicle
control valve (B308) magnet coil via pins B10 and
B11 of the ECU is incorrect due to:
-

copper short circuit in the magnet coil

-

short circuit or contact resistance between
pins B10 and B11 of the EBS unit

-

EBS pressure control on drawn vehicle
deactivated

66-55

Drawn vehicle control valve (B308) output
pressure measured on pin B14 of the ECU is
incorrect in relation to the current through the
magnet coil due to:
-

defective pressure sensor

-

too low a supply pressure

-

EBS pressure control on drawn vehicle
deactivated

67-42

Pressure sensor fault in drawn vehicle control
valve (B308) due to:
-

short circuit to supply on pin B14 of the EBS
unit

-

interruption on pin D3 of the EBS unit

-

short circuit to supply on pin D3 of the EBS
unit

-

Open circuit in EBS pressure control, drawn
vehicle

67-43

With a nonactivated drawn vehicle control valve,
drawn vehicle control valve (B308) pressure
sensor output signal on pin B14 of the EBS unit is
too low or too high due to:
-

defective pressure sensor

-

no or too low a supply voltage to pressure
sensor

-

Open circuit in EBS pressure control, drawn
vehicle

67-51

With a non-activated drawn vehicle control valve
and a speed >30 km/hour, drawn vehicle control
valve (B308) pressure sensor output signal on pin
B14 of the EBS unit is too low or too high due to:
-

defective pressure sensor

-

Open circuit in EBS pressure control, drawn
vehicle

68-25

Permanent actuation of the drawn vehicle control
valve (B308) due to:
-

short circuit to supply on one side and short
circuit to earth on the other side

-

Brake remains applied to drawn vehicle

68-32

Short circuit to earth on pin B10 of the EBS unit,
drawn vehicle control valve (B308)

-

EBS pressure control on drawn vehicle
deactivated

68-33

Short circuit to supply on pin B10 of the EBS unit,
drawn vehicle control valve (B308)

-

EBS pressure control on drawn vehicle
deactivated

68-34

Short circuit to earth on pin B11 of the EBS unit,
drawn vehicle control valve (B308)

-

EBS pressure control on drawn vehicle
deactivated

68-35

Short circuit to supply on pin B11 of the EBS unit,
drawn vehicle control valve (B308)

-

EBS pressure control on drawn vehicle
deactivated

68-36

Interruption on pin B10 and/or B11 of the EBS
unit, drawn vehicle control valve (B308)

-

EBS pressure control on drawn vehicle
deactivated

73-15

If a drawn vehicle with EBS sends a CAN
message to the ECU of the prime mover,
indicating that the "serious drawn vehicle failure"
needs to be activated on DIP, this fault code will
be stored in the prime mover ECU.

Fault code

Fault code description with possible cause

Symptom

EBS

1-14

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EBS fault codes

1

DAVIE XD diagnostics manual