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

...

DAVIE XD diagnostics manual

Structure

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

200438

ECAS-3

AGS

ZF INTARDER EST42

DAVIE XD diagnostics manual

STRUCTURE

ALS-S

ECS-DC3

IMMOBILISER

CDM

200438

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

Contents

200438 1

EBS

Contents

DAVIE XD diagnostics manual

200438

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.

EBS fault codes

200438 1-1

EBS

EBS fault codes

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.

DAVIE XD diagnostics manual

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

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

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

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

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

- ABS on front axle deactivated

- ASR brake control deactivated

- EBS pressure control on front axle and drawn vehicle deactivated

- ABS on front axle deactivated

- ASR brake control deactivated

- EBS pressure control on front axle and drawn vehicle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

- 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.

1-2

200438

EBS

DAVIE XD diagnostics manual

Fault code Fault code description with possible cause Symptom

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

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

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

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

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

- No noticeable system limitation in EBS

- ASR brake/engine control deactivated

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

EBS fault codes

16-12 Configuration parameters in the electronic unit

incorrect due to:

- incorrect programming

- retrofitted components without identification card (oxford) change

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

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

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%

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

wheel speed sensor (F513)

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- ASR brake/engine control deactivated

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

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

200438 1-3

EBS

EBS fault codes

Fault code Fault code description with possible cause Symptom

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

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

EBS unit, wheel speed sensor (F513)

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

EBS unit, wheel speed sensor (F513)

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

wheel speed sensor (F513)

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

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 and rear axles deactivated

- ASR brake/engine control deactivated

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

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

DAVIE XD diagnostics manual

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

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

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

wheel speed sensor (F512)

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

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

EBS unit, wheel speed sensor (F512)

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

EBS unit, wheel speed sensor (F512)

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

wheel speed sensor (F512)

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

- ABS on front axle, right deactivated

- ASR brake/engine control deactivated

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

1-4

200438

EBS

DAVIE XD diagnostics manual

Fault code Fault code description with possible cause Symptom

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

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

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

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

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

- ABS on front axle, left deactivated

- ASR brake/engine control deactivated

EBS fault codes

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

modulator (D879), wheel speed sensor (F515)

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

rear axle modulator (D879), wheel speed sensor (F515)

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

rear axle modulator (D879), wheel speed sensor (F515)

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

axle modulator (D879), wheel speed sensor (F515)

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

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

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

200438 1-5

EBS

EBS fault codes

Fault code Fault code description with possible cause Symptom

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

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

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

C1 and C2 of the rear axle modulator (D879)

24-41 Short circuit to earth in wheel speed sensor

(F514) on pins C1 and C2 of the rear axle modulator (D879)

24-42 Short circuit to supply in wheel speed sensor

(F514) on pins C1 and C2 of the rear axle modulator (D879)

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

axle modulator (D879), wheel speed sensor (F514)

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

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

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, right deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, right deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

DAVIE XD diagnostics manual

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

1-6

- ABS on rear axle, left deactivated

- ASR brake/engine control deactivated

200438

EBS

DAVIE XD diagnostics manual

Fault code Fault code description with possible cause Symptom

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

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

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

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

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

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

- 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

- No noticeable system limitation in EBS

- 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.

- No noticeable system limitation in EBS

- 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.

EBS fault codes

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

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

200438 1-7

EBS

EBS fault codes

Fault code Fault code description with possible cause Symptom

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

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

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

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

- No noticeable system limitation in EBS

- ASR brake/engine control deactivated

DAVIE XD diagnostics manual

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

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

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

specified period of time from the gearbox (AS Tronic) if the drive line is activated

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

1-8

- No noticeable system limitation in EBS

200438

EBS

DAVIE XD diagnostics manual

Fault code Fault code description with possible cause Symptom

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)

41-71 No CAN message received from VIC within a

specified period of time

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

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

43-61 CAN communication problem with the drawn

vehicle ECU via pins B3 and B6 of the EBS unit

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

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

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

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

- No noticeable system limitation in EBS

EBS fault codes

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

supply on pin A18 of the EBS unit

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

ABS valve (B256)

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

ABS valve (B256)

200438 1-9

- No noticeable system limitation in EBS

- ABS on front axle, left deactivated

- ABS on front axle deactivated

EBS

EBS fault codes

Fault code Fault code description with possible cause Symptom

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

valve (B256)

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

valve (B256)

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

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

valve (B256)

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

ABS valve (B256)

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

ABS valve (B256)

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

ABS valve (B257)

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

ABS valve (B257)

- ABS on front axle, left deactivated

- ABS on front axle deactivated

- EBS pressure control on front axle and drawn vehicle deactivated

- ABS on front axle, left deactivated

- ABS on front axle deactivated

- ABS on front axle, right deactivated

- ABS on front axle deactivated

DAVIE XD diagnostics manual

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

(B257)

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

(B257)

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

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

(B257)

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

ABS valve (B257)

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

ABS valve (B256)

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

unit, ABS valve (B256 or B257)

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

EBS unit, ABS valve (B256 or B257)

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

55-31 Interruption in redundancy valve (B306),

measured via pin B12 of the EBS unit

- ABS on front axle, right deactivated

- ABS on front axle deactivated

- EBS pressure control on front axle and drawn vehicle deactivated

- ABS on front axle, right deactivated

- ABS on front axle deactivated

- No noticeable system limitation in EBS

- ABS on front axle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- 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

1-10

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

200438

EBS

DAVIE XD diagnostics manual

Fault code Fault code description with possible cause Symptom

55-33 Short circuit to supply in redundancy valve

(B306), measured via pin B12 of the EBS unit

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

57-31 Interruption on pin C6 of the EBS unit, ASR cut-

off valve (B309)

57-32 Short circuit to earth on pin C6 of the EBS unit,

ASR cut-off valve (B309)

57-33 Short circuit to supply on pin C6 of the EBS unit,

ASR cut-off valve (B309)

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

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

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

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

- ABS on front axle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- ASR brake control deactivated

- No noticeable system limitation in EBS

- EBS pressure control on front axle deactivated

- Open circuit in EBS pressure control, front axle

EBS fault codes

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

63-32 Short circuit to earth on pin D1 of the EBS unit,

front axle modulator (B307)

200438 1-11

- Brake remains applied to front axle

- EBS pressure control on front axle deactivated

EBS

EBS fault codes

Fault code Fault code description with possible cause Symptom

63-33 Short circuit to supply on pin D1 of the EBS unit,

front axle modulator (B307)

63-34 Short circuit to earth on pin D2 of the EBS unit,

front axle modulator (B307)

63-35 Short circuit to supply on pin D2 of the EBS unit,

front axle modulator (B307)

63-36 Interruption on pin D1 and/or D2 of the EBS unit,

front axle modulator (B307)

64-13 The EBS unit parameters for the rear axle

modulator type do not correspond with the parameters in the rear axle modulator (D879)

64-16 Fault in the solenoid valves of the rear axle

modulator (D879)

64-51 Output pressure of the rear axle modulator

(D879) is too high

64-52 Brake pressure signal difference between both

pressure sensors in rear axle modulator (D879) is too high

64-54 No pressure sensor signal in rear axle modulator

(D879) or signal is incorrect (too high/too low)

64-64 CAN communication problem of the EBS unit with

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

- EBS pressure control on front axle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

- ABS on rear axle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- Open circuit in EBS pressure control, rear axle

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

DAVIE XD diagnostics manual

Supply voltage on pin B7 of the EBS unit interrupted

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

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

1-12

- 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

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

- EBS pressure control on rear axle deactivated

- ABS on front and rear axles deactivated

- ASR brake/engine control deactivated

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

200438

EBS

DAVIE XD diagnostics manual

Fault code Fault code description with possible cause Symptom

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

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

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

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

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

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

68-32 Short circuit to earth on pin B10 of the EBS unit,

drawn vehicle control valve (B308)

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

- Open circuit in EBS pressure control, drawn vehicle

- Brake remains applied to drawn vehicle

- EBS pressure control on drawn vehicle deactivated

EBS fault codes

68-34 Short circuit to earth on pin B11 of the EBS unit,

drawn vehicle control valve (B308)

68-35 Short circuit to supply on pin B11 of the EBS unit,

drawn vehicle control valve (B308)

68-36 Interruption on pin B10 and/or B11 of the EBS

unit, drawn vehicle control valve (B308)

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.

200438 1-13

- EBS pressure control on drawn vehicle deactivated

EBS

EBS fault codes

DAVIE XD diagnostics manual

1-14

200438

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.

EBS customer parameters

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.

200438 2-1

EBS

EBS customer parameters DAVIE XD diagnostics manual

drawn vehicle when braking is started.

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

Maximum value to

be set:

Minimum value to

be set:

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

Explanation Dependences: Notes

determines the pulsing "P-inshot" to the drawn

vehicle.

2.2 EXPLANATORY NOTES TO EBS CUSTOMER PARAMETERS

2-2

EBS Customer

parameter code

3-01 This is a comfort parameter setting which

200438

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 reprogrammed.

System inspection with DAVIE XD

200438 3-1

EBS

System inspection with DAVIE XD

DAVIE XD diagnostics manual

3-2

200438

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

Contents

200438 1

UPEC

Contents

DAVIE XD diagnostics manual

200438

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.

UPEC fault codes

200438 1-1

UPEC

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

13-1 Internal fault in ECU during the checking

procedure after the ignition was switched off

13-2 Internal fault in ECU during the checking

procedure after the ignition was switched off

13-4 Internal fault in ECU during the checking

procedure after the ignition was switched off

13-8 Internal fault in ECU during the checking

procedure after the ignition was switched off

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

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

- No noticeable system limitation in UPEC

- 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

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

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

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

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

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

pin A24 and/or pin A25 of the ECU

- 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

- System response depending on voltage level

supply voltage fault

- Engine stalls and/or engine starts but does not fire

1-2

200438

UPEC

DAVIE XD diagnostics manual

Fault code Fault code description with possible cause Symptom

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

Short circuit to earth on pump unit connections, pin A24 and/or pin A25 of the ECU

Short circuit to supply of the pump unit (B131) on pin A35 of the ECU

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

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

close due to:

- jammed valve

- internal contamination

- internal wear

The valve inside the pump unit (B131) does not close fast enough due to:

- internal contamination

- internal wear

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

open fast enough due to:

- mechanical problems

- internal contamination

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

pin A24 and/or pin A25 of the ECU

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

Short circuit to earth on pump unit connections, pin A24 and/or pin A25 of the ECU

- Engine running on 5 cylinders

- Reduced engine output

- Engine stalls and/or engine starts but does not fire

- Engine running on 3 cylinders

- Engine does not supply power

- Engine running on 5 cylinders

- Reduced engine output

- No noticeable system limitation in UPEC

- Engine stalls and/or engine starts but does not fire

- Engine running on 5 cylinders

- Reduced engine output

- Engine stalls and/or engine starts but does not fire

UPEC fault codes

Short circuit to supply of the pump unit (B135) on pin A26 of the ECU

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

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

close due to:

- jammed valve

- internal contamination

- internal wear

The valve inside the pump unit (B135) does not close fast enough due to:

- internal contamination

- internal wear

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

open fast enough due to:

- mechanical problems

- internal contamination

200438 1-3

- Engine stalls and/or engine starts but does not fire

- Engine running on 3 cylinders

- Engine does not supply power

- Engine running on 5 cylinders

- Reduced engine output

- No noticeable system limitation in UPEC

UPEC

UPEC fault codes

Fault code Fault code description with possible cause Symptom

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

pin A24 and/or pin A25 of the ECU

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

Short circuit to earth on pump unit connections, pin A24 and/or pin A25 of the ECU

Short circuit to supply of the pump unit (B133) on pin A34 of the ECU

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

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

close due to:

- jammed valve

- internal contamination

- internal wear

The valve inside the pump unit (B133) does not close fast enough due to:

- internal contamination

- internal wear

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

open fast enough due to:

- mechanical problems

- internal contamination

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

pin A24 and/or pin A25 of the ECU

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

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

- Engine running on 5 cylinders

- Reduced engine output

- Engine stalls and/or engine starts but does not fire

- Engine running on 3 cylinders

- Engine does not supply power

- Engine running on 5 cylinders

- Reduced engine output

- No noticeable system limitation in UPEC

- Engine stalls and/or engine starts but does not fire

- Engine running on 5 cylinders

- Reduced engine output

- Engine stalls and/or engine starts but does not fire

DAVIE XD diagnostics manual

Short circuit to supply of the pump unit (B136) on pin A27 of the ECU

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

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

close due to:

- jammed valve

- internal contamination

- internal wear

The valve inside the pump unit (B136) does not close fast enough due to:

- internal contamination

- internal wear

1-4

- Engine stalls and/or engine starts but does not fire

- Engine running on 3 cylinders

- Engine does not supply power

- Engine running on 5 cylinders

- Reduced engine output

200438

+ 243 hidden pages

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

Specifications and Main Features

Frequently Asked Questions

User Manual

1 EBS

1. EBS FAULT CODES

1.1 INTRODUCTION

1.2 EXPLANATORY NOTES TO EBS FAULT CODES

2. EBS CUSTOMER PARAMETERS

2.1 INTRODUCTION

2.2 EXPLANATORY NOTES TO EBS CUSTOMER PARAMETERS

3. SYSTEM INSPECTION WITH DAVIE XD

3.1 GENERAL

2 UPEC

1. UPEC FAULT CODES

1.1 INTRODUCTION

1.2 EXPLANATORY NOTES TO UPEC FAULT CODES