DAF LF45, LF55, CF65, CF75, CF85 Fault Codes

...

4.5 (2)

STRUCTURE

200438

DAVIE XD diagnostics manual

Structure

EBS

UPEC

AS TRONIC

VIC

EMAS

HYDRONIC 10 (ACH-EW)

CDS-3

ECAS-2

AIRTRONIC (ACH-EA)

ABS-D AND ABS/ASR-E

D3LC (ACH-EA)

EBS-2

ECAS-3

AGS

ZF INTARDER EST42

https://www.truck-manuals.net/

200438

STRUCTURE

DAVIE XD diagnostics manual

ALS-S

ECS-DC3

IMMOBILISER

CDM

https://www.truck-manuals.net/

200438 1

Contents

EBS

DAVIE XD diagnostics manual

1 EBS

CONTENTS

Page Date

1. EBS FAULT CODES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200438

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200438

1.2 Explanatory notes to EBS fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200438

2. EBS CUSTOMER PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200438

2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200438

2.2 Explanatory notes to EBS customer parameters. . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200438

3. SYSTEM INSPECTION WITH DAVIE XD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200438

3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200438

https://www.truck-manuals.net/

EBS

200438

Contents

DAVIE XD diagnostics manual

https://www.truck-manuals.net/

200438 1-1

EBS fault codes

EBS

DAVIE XD diagnostics manual

1. EBS FAULT CODES

1.1 INTRODUCTION

If the electronic unit detects a system fault, this

fault is usually stored in the memory of the

electronic unit as a fault code.

Most system faults will also generate a warning.

https://www.truck-manuals.net/

EBS

1-2

200438

EBS fault codes

DAVIE XD diagnostics manual

1.2 EXPLANATORY NOTES TO EBS FAULT CODES

If there is an electrical fault in the EBS system,

the symptom "open circuit in EBS pressure

control" or "deactivation of EBS pressure control"

may occur as a system reaction.

Open circuit in EBS pressure control

On application of the foot brake valve, the

electronic unit will receive information on the

desired vehicle deceleration from the brake pedal

position sensor in the foot brake valve.

In the electronic unit, this vehicle deceleration

command is converted into brake pressure to the

brake cylinders.

If there is no feedback from the output pressure

or wheel speed, there will be less accurate

electronically controlled deceleration and brake

force distribution.

Deactivation of EBS pressure control

The output pressure control in the brake cylinders

is entirely pneumatic; i.e. there is no more

electronically controlled deceleration and brake

force distribution.

Fault code Fault code description with possible cause Symptom

11-18 Voltage on pin A8 of the EBS unit is too low due

to:

- contact resistance or poor connection to pin

A8 of the EBS unit

- ABS on front axle deactivated

- ASR brake control deactivated

- EBS pressure control on front axle and

drawn vehicle deactivated

11-31 Extremely low voltage (<3 V) on pin A8 of the

EBS unit due to:

- excessive contact resistance on pin A8 of

the EBS unit

- interruption on pin A8 of the EBS unit

- ABS on front axle deactivated

- ASR brake control deactivated

- EBS pressure control on front axle and

drawn vehicle deactivated

12-18 Voltage on pin A9 of the EBS unit is too low due

to:

- contact resistance or poor connection to pin

A9 of the EBS unit

- short circuit to earth on pin B7 of the EBS

unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle

deactivated

12-31 Extremely low voltage (<3 V) on pin A9 of the

EBS unit due to:

- excessive contact resistance on pin A9 of

the EBS unit

- interruption on pin A9 of the EBS unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle

deactivated

Short circuit to earth on pin E4 or B7 of the EBS

unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle

deactivated

- Pin B7 is connected to earth inside the EBS

unit while the power supply to A9 and E4 is

interrupted inside the unit.

https://www.truck-manuals.net/

200438 1-3

EBS fault codes

EBS

DAVIE XD diagnostics manual

13-18 Voltage on pin A7 of the EBS unit is too low due

to:

- contact resistance or poor connection to pin

A7 of the EBS unit

- No noticeable system limitation in EBS

14-32 Sensor supply voltage on pins D9, B13 or E1 of

the EBS unit due is too low due to:

- contact resistance or poor connection on

specified connection points of the EBS unit

- short circuit to earth on specified connection

points of the EBS unit

- No noticeable system limitation in EBS

14-33 Constant voltage, even if the ignition is turned off

and the brake is not applied, on pin D9, B13 or E1

of the EBS unit due to:

- short circuit to supply on specified

connection points of the EBS unit

- No noticeable system limitation in EBS

15-33 Constant voltage, even if the ignition is turned off

and the brake is not applied, on pin B7 of the EBS

unit due to:

- short circuit to supply on pin B7 of the EBS

unit

- No noticeable system limitation in EBS

16-11 Internal failure in EBS electronic unit - ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

16-12 Configuration parameters in the electronic unit

incorrect due to:

- incorrect programming

- retrofitted components without identification

card (oxford) change

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

16-15 Internal failure in EBS electronic unit - ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

16-17 Voltage (>32 V) on pins A7, A8 and A9 of the EBS

unit is too high due to:

- excessive alternator/battery voltage

- inductive voltage of external component

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

16-18 Voltage on pins A7, A8 and A9 of the EBS unit at

a speed of >2 km/h is too low due to:

- insufficient battery voltage

- poor earth connection to EBS electronic unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

16-53 Incorrect tyre size due to:

- incorrectly programmed tyre size

- tyre sizes of front and rear axles in different

tyre classes without unit having been

reprogrammed

- The difference in peripheral speed between

the left and right wheel on the same axle

exceeds 10%

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

21-37 Interruption on pin C4 and/or C5 of the EBS unit,

wheel speed sensor (F513)

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

EBS

1-4

200438

EBS fault codes

DAVIE XD diagnostics manual

21-38 Unacceptable wheel speed sensor frequency

signal from wheel speed sensor (F513) on pins

C4 and C5 of the EBS unit due to:

- loose pole ring

- wrong assessment by EBS unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

21-41 Short circuit to earth on pin C4 and/or C5 of the

EBS unit, wheel speed sensor (F513)

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

21-42 Short circuit to supply on pin C4 and/or C5 of the

EBS unit, wheel speed sensor (F513)

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

21-44 Short circuit on pin C4 and/or C5 of the EBS unit,

wheel speed sensor (F513)

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

21-45 Incorrect wheel speed sensor sine-wave signal

from wheel speed sensor (F513) on pins C4 and

C5 of the EBS unit due to:

- distorted wheel speed sensor ring

- damaged wheel speed sensor ring

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

21-46 No uniformity (frequency changes) of wheel

speed sensor signal from wheel speed sensor

(F513) on pins C4 and C5 of the EBS unit due to:

- heavy point due to brake disc wobble, for

example

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

21-47 Excessive oscillation of wheel speed sensor

signal (maximum/minimum level) from wheel

speed sensor (F513) on pins C4 and C5 of the

EBS unit due to:

- excessive wheel bearing play

- incorrect mounting of wheel speed sensor

ring

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

21-48 Minimum value of wheel speed sensor signal

from wheel speed sensor (F513) on pins C4 and

C5 of the EBS unit is too low due to:

- too large an air gap between wheel speed

sensor ring and wheel speed sensor

- contact resistance on pin C4 and/or C5 of

the EBS unit

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

22-37 Interruption on pin D7 and/or D8 of the EBS unit,

wheel speed sensor (F512)

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

22-38 Unacceptable wheel speed sensor frequency

signal from wheel speed sensor (F512) on pins

D7 and D8 of the EBS unit due to:

- loose pole ring

- wrong assessment by EBS unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

22-41 Short circuit to earth on pin D7 and/or D8 of the

EBS unit, wheel speed sensor (F512)

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

22-42 Short circuit to supply on pin D7 and/or D8 of the

EBS unit, wheel speed sensor (F512)

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

22-44 Short circuit on pin D7 and/or D8 of the EBS unit,

wheel speed sensor (F512)

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

200438 1-5

EBS fault codes

EBS

DAVIE XD diagnostics manual

22-45 Incorrect wheel speed sensor sine-wave signal

from wheel speed sensor (F512) on pins D7 and

D8 of the EBS unit due to:

- distorted wheel speed sensor ring

- damaged wheel speed sensor ring

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

22-46 No uniformity (frequency changes) of wheel

speed sensor signal from wheel speed sensor

(F512) on pins D7 and D8 of the EBS unit due to:

- heavy point due to brake disc wobble, for

example

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

22-47 Excessive oscillation of wheel speed sensor

signal (maximum/minimum level) from wheel

speed sensor (F512) on pins D7 and D8 of the

EBS unit due to:

- excessive wheel bearing play

- incorrect mounting of wheel speed sensor

ring

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

22-48 Minimum value of wheel speed sensor signal

from wheel speed sensor (F512) on pins D7 and

D8 of the EBS unit is too low due to:

- too large an air gap between wheel speed

sensor ring and wheel speed sensor

- contact resistance on pin D7 and/or D8 of

the EBS unit

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

23-37 Interruption on pin B1 and/or B2 of the rear axle

modulator (D879), wheel speed sensor (F515)

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

23-41 Short circuit to earth on pin B1 and/or B2 of the

rear axle modulator (D879), wheel speed sensor

(F515)

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

23-42 Short circuit to supply on pin B1 and/or B2 of the

rear axle modulator (D879), wheel speed sensor

(F515)

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

23-44 Short circuit between pins B1 and B2 of the rear

axle modulator (D879), wheel speed sensor

(F515)

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

23-45 Incorrect wheel speed sensor sine-wave signal

from wheel speed sensor (F515) on pins B1 and

B2 of the rear axle modulator (D879) due to:

- distorted wheel speed sensor ring

- damaged wheel speed sensor ring

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

23-46 No uniformity (frequency changes) of wheel

speed sensor signal from wheel speed sensor

(F515) on pins B1 and B2 of the rear axle

modulator (D879) due to:

- excessive wheel bearing play

- incorrect mounting of wheel speed sensor

ring

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

EBS

1-6

200438

EBS fault codes

DAVIE XD diagnostics manual

23-47 Excessive oscillation of wheel speed sensor

signal (maximum/minimum level) from wheel

speed sensor (F515) on pins B1 and B2 of the

rear axle modulator (D879) due to:

- excessive wheel bearing play

- incorrect mounting of wheel speed sensor

ring

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

23-48 Minimum value of wheel speed sensor signal

from wheel speed sensor (F515) on pins B1 and

B2 of the rear axle modulator (D879) is too low

due to:

- too large an air gap between wheel speed

sensor ring and wheel speed sensor

- contact resistance on pin B1 and/or B2 of

the rear axle modulator

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

24-37 Interruption in wheel speed sensor (F514) on pins

C1 and C2 of the rear axle modulator (D879)

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

24-41 Short circuit to earth in wheel speed sensor

(F514) on pins C1 and C2 of the rear axle

modulator (D879)

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

24-42 Short circuit to supply in wheel speed sensor

(F514) on pins C1 and C2 of the rear axle

modulator (D879)

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

24-44 Short circuit between pins C1 and C2 of the rear

axle modulator (D879), wheel speed sensor

(F514)

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

24-45 Incorrect wheel speed sensor sine-wave signal

from wheel speed sensor (F514) on pins C1 and

C2 of the rear axle modulator (D879) due to:

- distorted wheel speed sensor ring

- damaged wheel speed sensor ring

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

24-46 No uniformity (frequency changes) of wheel

speed sensor signal from wheel speed sensor

(F514) on pins C1 and C2 of the rear axle

modulator (D879) due to:

- excessive wheel bearing play

- incorrect mounting of wheel speed sensor

ring

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

24-47 Excessive oscillation of wheel speed sensor

signal (maximum/minimum level) from wheel

speed sensor (F514) on pins C1 and C2 of the

rear axle modulator (D879) due to:

- excessive wheel bearing play

- incorrect mounting of wheel speed sensor

ring

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

24-48 Minimum value of wheel speed sensor signal

from wheel speed sensor (F514) on pins C1 and

C2 of the rear axle modulator (D879) is too low

due to:

- too large an air gap between wheel speed

sensor ring and wheel speed sensor

- contact resistance on pin C1 and/or C2 of

the rear axle modulator

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

200438 1-7

EBS fault codes

EBS

DAVIE XD diagnostics manual

31-16 Large deviation between the duty cycle signals

from the foot brake valve (F628) on pins E2 and

E5 of the EBS unit due to:

- internal fault in foot brake 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

- Low voltage on connection point A9 inside

EBS unit

31-52 Large deviation between the duty cycle signals

from the foot brake valve (F628) on pins E2 and

E5 of the EBS unit due to:

- internal fault in foot brake valve

- No noticeable system limitation in EBS

32-37 No signal from brake pedal position switch 1 in

foot brake valve (F628) on pin E3 of the EBS unit

due to:

- defective switch

- interruption on pin E3 of the EBS unit

- No noticeable system limitation in EBS

32-41 Brake pedal position switch 1 remains closed in

foot brake valve (F628) or short circuit to earth on

pin E3 of the EBS unit

- The actuating pressure control is active

when the brake pedal is not applied; after a

specified time (approx. 1 min.) the actuating

pressure control will automatically

disengage.

33-37 No signal from brake pedal position switch 2 in

foot brake valve (F628) on pin E6 of the EBS unit

due to:

- defective switch in foot brake valve

- interruption on pin E6 of the EBS unit

- No noticeable system limitation in EBS

33-41 Brake pedal position switch 2 remains closed in

foot brake valve (F628) or short circuit to earth on

pin E6 of the EBS unit

- The actuating pressure control is active

when the brake pedal is not applied; after a

specified time (approx. 1 min.) the actuating

pressure control will automatically

disengage.

34-41 Lower signal level from brake pedal position

sensor 1 in foot brake valve (F628) on pin E2 of

the EBS unit is too low during a specified period

of time due to:

- contact resistance on pin E2 of the EBS unit

- internal fault in foot brake valve

- short circuit to earth on pin E2 of the EBS

unit

- No noticeable system limitation in EBS

34-43 Upper signal level from brake pedal position

sensor 1 in foot brake valve (F628) on pin E2 of

the EBS unit is too high during a specified time or

the pulse width of the signal is incorrect due to:

- short circuit to supply on pin E2 of the EBS

unit

- internal fault in foot brake valve

- interruption on pin E1 of the EBS unit

- interruption on connection point E2 of the

EBS unit

- No noticeable system limitation in EBS

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

EBS

1-8

200438

EBS fault codes

DAVIE XD diagnostics manual

35-41 Lower signal level from brake pedal position

sensor 2 in foot brake valve (F628) on pin E5 of

the EBS unit is too low during a specified period

of time due to:

- contact resistance on pin E5 of the EBS unit

- internal fault in foot brake valve

- short circuit to earth on pin E5 of the EBS

unit

- No noticeable system limitation in EBS

35-43 Upper signal level from brake pedal position

sensor 2 in foot brake valve (F628) on pin E5 of

the EBS unit is too high during a specified time or

the pulse width of the signal is incorrect due to:

- short circuit to supply on pin E5 of the EBS

unit

- internal fault in foot brake valve

- interruption on pin E4 of the EBS unit

- interruption on pin E5 of the EBS unit

- No noticeable system limitation in EBS

41-61 Communication via V-CAN on pins A1 and A3 of

the EBS unit not possible when switching on

ignition due to:

- interruption on pin A1 of the EBS unit

- short circuit to earth on pin A3 of the EBS

unit

- short circuit to supply on pin A1 and/or A3 of

the EBS unit

- ASR brake/engine control deactivated

41-63 Interrupted communication via V-CAN on pins A1

and A3 of the EBS unit due to:

- interruption on pin A1 and/or A3 of the EBS

unit

- short circuit to earth on pin A3 of the EBS

unit

- short circuit to supply on pin A1 and/or A3 of

the EBS unit

- ASR brake/engine control deactivated

41-65 No CAN message "ERC1" received within a

specified period of time from the engine

management system in relation to the engine

braking torque

- No noticeable system limitation in EBS

41-66 No CAN message "EEC1" received within a

specified period of time from the engine

management system in relation to the engine

torque and engine speed

- No noticeable system limitation in EBS

41-67 No CAN message "ETC1" received within a

specified period of time from the gearbox

(AS Tronic) if the drive line is activated

- No noticeable system limitation in EBS

41-68 No CAN message "CCVS" received within a

specified period of time from the engine

management system in relation to the parking

brake status, vehicle speed and clutch status

- No noticeable system limitation in EBS

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

200438 1-9

EBS fault codes

EBS

DAVIE XD diagnostics manual

41-69 No CAN message "TCO1" received within a

specified period of time from the tachograph in

relation to the vehicle speed due to:

- communication problem with the tachograph

(MTCO)

- K-factor in MTCO incorrect or not there

- delayed loss of supply voltage on EBS unit

when switching off ignition (this is a common

production situation but it has been solved in

subsequent production versions by the

addition of relay G426)

- No noticeable system limitation in EBS

41-71 No CAN message received from VIC within a

specified period of time

- No noticeable system limitation in EBS

42-16 EBS unit does not receive correct CAN message

from the rear axle modulator (D879) on pins B1

and B4 of the EBS unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on front axle, rear axle

and drawn vehicle deactivated

42-61 Interrupted CAN communication with the rear

axle modulator (D879) via pins B1 and B4 of the

EBS unit due to:

- short circuit to earth on pin B4 of the EBS

unit

- short circuit to supply on pin B1 and/or pin

B4 of the EBS unit

- short circuit between pin B1 and pin B4 of

the EBS unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle

deactivated

43-61 CAN communication problem with the drawn

vehicle ECU via pins B3 and B6 of the EBS unit

- No noticeable system limitation in EBS

43-63 Interrupted CAN communication, with a driving

combination, with the drawn vehicle ECU via pins

B3 and B6 of the EBS unit due to:

- interruption on pins B3 and B6 of the EBS

unit

- short circuit between pin B3 and pin B6 of

the EBS unit

- No noticeable system limitation in EBS

43-75 Interrupted CAN communication, with a driving

combination, with the drawn vehicle ECU via pin

B3 (CAN-H) of the EBS unit due to:

- interruption on pin B3 of the EBS unit

- short circuit on pin B3 of the EBS unit

- No noticeable system limitation in EBS

43-76 Interrupted communication, with a driving

combination, with the drawn vehicle ECU via pin

B6 (CAN-L) of the EBS unit due to:

- interruption on pin B6 of the EBS unit

- short circuit on pin B6 of the EBS unit

- No noticeable system limitation in EBS

45-16 Interruption, short circuit to earth or short circuit to

supply on pin A18 of the EBS unit

- No noticeable system limitation in EBS

51-21 Short circuit to earth on pin D11 of the EBS unit,

ABS valve (B256)

- ABS on front axle, left deactivated

51-22 Short circuit to supply on pin D11 of the EBS unit,

ABS valve (B256)

- ABS on front axle deactivated

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

EBS

1-10

200438

EBS fault codes

DAVIE XD diagnostics manual

51-23 Interruption on pin D12 of the EBS unit, ABS

valve (B256)

- ABS on front axle, left deactivated

51-24 Interruption on pin D11 of the EBS unit, ABS

valve (B256)

- ABS on front axle, left deactivated

51-25 Continuous actuation of ABS valve (B256) via

pins D10 and D12 and/or D11 and D12 of the

EBS unit due to:

- internal short circuit in EBS unit

- ABS on front axle deactivated

- EBS pressure control on front axle and

drawn vehicle deactivated

51-26 Interruption on pin D10 of the EBS unit, ABS

valve (B256)

- ABS on front axle, left deactivated

51-27 Short circuit to earth on pin D10 of the EBS unit,

ABS valve (B256)

- ABS on front axle, left deactivated

51-28 Short circuit to supply on pin D10 of the EBS unit,

ABS valve (B256)

- ABS on front axle deactivated

52-21 Short circuit to earth on pin C2 of the EBS unit,

ABS valve (B257)

- ABS on front axle, right deactivated

52-22 Short circuit to supply on pin C2 of the EBS unit,

ABS valve (B257)

- ABS on front axle deactivated

52-23 Interruption on pin C3 of the EBS unit, ABS valve

(B257)

- ABS on front axle, right deactivated

52-24 Interruption on pin C2 of the EBS unit, ABS valve

(B257)

- ABS on front axle, right deactivated

52-25 Continuous actuation of ABS valve (B527) via

pins C1 and C3 and/or C2 and C3 of the EBS unit

due to:

- internal short circuit in EBS unit

- ABS on front axle deactivated

- EBS pressure control on front axle and

drawn vehicle deactivated

52-26 Interruption on pin C1 of the EBS unit, ABS valve

(B257)

- ABS on front axle, right deactivated

52-27 Short circuit to earth on pin C1 of the EBS unit,

ABS valve (B257)

- ABS on front axle, right deactivated

52-28 Short circuit to supply on pin C1 of the EBS unit,

ABS valve (B256)

- ABS on front axle deactivated

53-32 Short circuit to earth on pin D12 or C3 of the EBS

unit, ABS valve (B256 or B257)

- No noticeable system limitation in EBS

53-33 Short circuit to supply on pin D12 or C3 of the

EBS unit, ABS valve (B256 or B257)

- ABS on front axle deactivated

55-12 Incorrect redundancy valve (B306) parameters

due to:

- redundancy valve connected to the EBS unit

without the EBS unit having been

programmed for a redundancy 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

55-31 Interruption in redundancy valve (B306),

measured via pin B12 of the EBS unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle

deactivated

55-32 Short circuit to earth in redundancy valve (B306),

measured via pin B12 of the EBS unit

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle

deactivated

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

200438 1-11

EBS fault codes

EBS

DAVIE XD diagnostics manual

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

https://www.truck-manuals.net/

EBS

1-12

200438

EBS fault codes

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

https://www.truck-manuals.net/

200438 1-13

EBS fault codes

EBS

DAVIE XD diagnostics manual

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

https://www.truck-manuals.net/

EBS

1-14

200438

EBS fault codes

DAVIE XD diagnostics manual

https://www.truck-manuals.net/

200438 2-1

EBS customer parameters

EBS

DAVIE XD diagnostics manual

2. EBS CUSTOMER PARAMETERS

2.1 INTRODUCTION

Customer parameters

Customer parameters are the settings of an

electronic system. The customer parameters

permit adapting control functions of a system to

the customer's particular wishes and/or needs

within certain limits. The customer parameters

are stored in a list in the memory of the electronic

unit. Customer parameters can be modified using

the programming feature of DAVIE XD.

Programming using DAVIE XD is only possible if

the logged-in user has been registered as a

"Master Technician".

Note:

Erroneous settings of customer parameters may

affect the action of control functions to such an

extent that they function eratically or not at all.

After modification of the settings the (modified)

customer parameters must be stored in the

electronic unit using the programming function in

the customer parameter overview.

Customer parameter names and codes

Each customer parameter in a system has its

own name and code. The following explanation of

the customer parameters includes only the

codes. The availability of a customer parameter

in a system depends on the programmed

software in the electronic unit. The programmed

software depends on the vehicle configuration/

identity card data.

Standard values

Standard values, options and setting ranges may

vary according to the software variants of

DAVIE XD and the system. This is why they have

not been included in the following explanation of

the customer parameters.

https://www.truck-manuals.net/

EBS

2-2

200438

EBS customer parameters DAVIE XD diagnostics manual

2.2 EXPLANATORY NOTES TO EBS CUSTOMER PARAMETERS

EBS Customer

parameter code

Explanation Dependences: Notes

Minimum value to

be set:

Maximum value to

be set:

3-01 This is a comfort parameter setting which

determines the pulsing "P-inshot" to the drawn

vehicle.

0 bar 3.5 bar The presssure pulse activation ‚"P inshot" is only

available on FT vehicles and is only active if a drawn

vehicle without EBS system is coupled.

This setting can be changed if:

- there is a complaint relating to the towing of the

drawn vehicle when braking is started.

https://www.truck-manuals.net/

200438 3-1

System inspection with DAVIE XD

EBS

DAVIE XD diagnostics manual

3. SYSTEM INSPECTION WITH DAVIE XD

3.1 GENERAL

If the tyre size is changed or if the vehicle is

adjusted in such a way that the configuration is

changed, the electronic unit may have to be re-

programmed.

https://www.truck-manuals.net/

EBS

3-2

200438

System inspection with DAVIE XD

DAVIE XD diagnostics manual

https://www.truck-manuals.net/

200438 1

Contents

UPEC

DAVIE XD diagnostics manual

2 UPEC

CONTENTS

Page Date

1. UPEC FAULT CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200438

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200438

1.2 Explanatory notes to UPEC fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200438

2. UPEC CUSTOMER PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200438

2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200438

2.2 Explanatory notes to UPEC customer parameters . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200438

3. SYSTEM INSPECTION WITH DAVIE XD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200438

3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200438

3.2 Engine brake test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200438

3.3 Speed variation control test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 . . . . . 200438

https://www.truck-manuals.net/

UPEC

200438

Contents

DAVIE XD diagnostics manual

https://www.truck-manuals.net/

200438 1-1

UPEC fault codes

UPEC

DAVIE XD diagnostics manual

1. UPEC FAULT CODES

1.1 INTRODUCTION

If the electronic unit detects a system fault, this

fault is usually stored in the memory of the

electronic unit as a fault code.

Most system faults will also generate a warning.

https://www.truck-manuals.net/

UPEC

1-2

200438

UPEC fault codes

DAVIE XD diagnostics manual

1.2 EXPLANATORY NOTES TO UPEC FAULT CODES

Fault code Fault code description with possible cause Symptom

11-1 Internal communication fault in ECU - Engine stalls and/or engine starts but does

not fire

11-2 Internal communication fault in ECU - Engine stalls and/or engine starts but does

not fire

12-1 Internal fault in ECU due to:

- defective EEPROM

- No noticeable system limitation in UPEC

13-1 Internal fault in ECU during the checking

procedure after the ignition was switched off

- No noticeable system limitation in UPEC

13-2 Internal fault in ECU during the checking

procedure after the ignition was switched off

- No noticeable system limitation in UPEC

13-4 Internal fault in ECU during the checking

procedure after the ignition was switched off

- No noticeable system limitation in UPEC

13-8 Internal fault in ECU during the checking

procedure after the ignition was switched off

- No noticeable system limitation in UPEC

14-1 Voltage on pin B15 but no voltage on pins B3 and

B4 of the ECU due to:

- faulty relay G126

- no activation of relay G126

- no supply voltage on relay G126

- open connection to pin B27

- short circuit to supply on pin B27

- Engine stalls and/or engine starts but does

not fire

- Communication fault with DAVIE so that

fault code cannot be read out

- Several systems will output error messages

in connection with the CAN communication

15-1 Internal fault in ECU - No noticeable system limitation

21-8 Voltage on pins B3 and B4, with no voltage being

applied anymore on pin B15 of the ECU due to:

- faulty relay G126

- short circuit to earth on pin B27

- short circuit to supply on pin B3 and/or B4

- Engine starts but will not fire

- Communication fault with DAVIE so that

fault code cannot be read out

- Several systems will output error messages

in connection with the CAN communication

22-1 Voltage on pins B3, B4 and B15 of the ECU is too

high (>30 V) due to:

- excessive alternator/battery voltage

- inductive voltage of external component

- System response depending on voltage

level

22-2 Voltage on pins B3, B4 and B15 of the ECU is too

low (<14 V) due to:

- insufficient supply voltage, for example

during starting

- contact resistance in power supply circuit

- System response depending on voltage

level

22-4 Internal supply voltage fault in ECU - System response depending on internal

supply voltage fault

31-1 Short circuit to supply on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

https://www.truck-manuals.net/

200438 1-3

UPEC fault codes

UPEC

DAVIE XD diagnostics manual

31-2 Short circuit to earth or interruption in the pump

unit (B131) on pin A35 of the ECU, causing the

pump unit of cylinder 1 to be switched off

- Engine running on 5 cylinders

- Reduced engine output

Short circuit to earth on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

Short circuit to supply of the pump unit (B131) on

pin A35 of the ECU

- Engine stalls and/or engine starts but does

not fire

Interruption in the pump unit (B131) on pin A24 of

the ECU, causing the pump unit of cylinders 1, 2

and 3 to be switched off

- Engine running on 3 cylinders

- Engine does not supply power

31-4 The valve inside the pump unit (B131) does not

close due to:

- jammed valve

- internal contamination

- internal wear

- Engine running on 5 cylinders

- Reduced engine output

The valve inside the pump unit (B131) does not

close fast enough due to:

- internal contamination

- internal wear

- Reduced engine output

31-8 The valve inside the pump unit (B131) does not

open fast enough due to:

- mechanical problems

- internal contamination

- No noticeable system limitation in UPEC

32-1 Short circuit to supply on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

32-2 Short circuit to earth or interruption in the pump

unit (B135) on pin A26 of the ECU, causing the

pump unit of cylinder 5 to be switched off

- Engine running on 5 cylinders

- Reduced engine output

Short circuit to earth on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

Short circuit to supply of the pump unit (B135) on

pin A26 of the ECU

- Engine stalls and/or engine starts but does

not fire

Interruption in the pump unit (B135) on pin A25 of

the ECU, causing the pump unit of cylinders 4, 5

and 6 to be switched off

- Engine running on 3 cylinders

- Engine does not supply power

32-4 The valve inside the pump unit (B135) does not

close due to:

- jammed valve

- internal contamination

- internal wear

- Engine running on 5 cylinders

- Reduced engine output

The valve inside the pump unit (B135) does not

close fast enough due to:

- internal contamination

- internal wear

- Reduced engine output

32-8 The valve inside the pump unit (B135) does not

open fast enough due to:

- mechanical problems

- internal contamination

- No noticeable system limitation in UPEC

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

UPEC

1-4

200438

UPEC fault codes

DAVIE XD diagnostics manual

33-1 Short circuit to supply on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

33-2 Short circuit to earth or interruption in the pump

unit (B133) on pin A34 of the ECU, causing the

pump unit of cylinder 3 to be switched off

- Engine running on 5 cylinders

- Reduced engine output

Short circuit to earth on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

Short circuit to supply of the pump unit (B133) on

pin A34 of the ECU

- Engine stalls and/or engine starts but does

not fire

Interruption in the pump unit (B133) on pin A24 of

the ECU, causing the pump unit of cylinders 1, 2

and 3 to be switched off

- Engine running on 3 cylinders

- Engine does not supply power

33-4 The valve inside the pump unit (B133) does not

close due to:

- jammed valve

- internal contamination

- internal wear

- Engine running on 5 cylinders

- Reduced engine output

The valve inside the pump unit (B133) does not

close fast enough due to:

- internal contamination

- internal wear

- Reduced engine output

33-8 The valve inside the pump unit (B133) does not

open fast enough due to:

- mechanical problems

- internal contamination

- No noticeable system limitation in UPEC

34-1 Short circuit to supply on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

34-2 Short circuit to earth or interruption in the pump

unit (B136) on pin A27 of the ECU, causing the

pump unit of cylinder 6 to be switched off

- Engine running on 5 cylinders

- Reduced engine output

Short circuit to earth on pump unit connections,

pin A24 and/or pin A25 of the ECU

- Engine stalls and/or engine starts but does

not fire

Short circuit to supply of the pump unit (B136) on

pin A27 of the ECU

- Engine stalls and/or engine starts but does

not fire

Interruption in the pump unit (B136) on pin A25 of

the ECU, causing the pump unit of cylinders 4, 5

and 6 to be switched off

- Engine running on 3 cylinders

- Engine does not supply power

34-4 The valve inside the pump unit (B136) does not

close due to:

- jammed valve

- internal contamination

- internal wear

- Engine running on 5 cylinders

- Reduced engine output

The valve inside the pump unit (B136) does not

close fast enough due to:

- internal contamination

- internal wear

- Reduced engine output

Fault code Fault code description with possible cause Symptom

https://www.truck-manuals.net/

+ 243 hidden pages