DAF CF65, CF75, CF85 Series . Manual - part 3

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Contents

EBS

DAVIE XD diagnostics manual 

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1 EBS

CONTENTS

Page

Date

1.

1.2

2.

2.2

3.

EBS

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Contents

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DAVIE XD diagnostics manual

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1-1

EBS fault codes

EBS

DAVIE XD diagnostics manual 

1

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

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EBS fault codes

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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.