DAF LF45, LF55 Series. Manual — part 44

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1-5

ABS-D and ABS/ASR-E fault codes

ABS-D AND ABS/ASR-E

DAVIE XD diagnostics manual

10

4-10

Unacceptable wheel speed sensor signal
frequency (F515) on pins B17 and B18 of the
ECU due to:
-

loose pole ring

-

wrong assessment by ECU

-

ABS on rear axle, right deactivated

-

ASR brake/engine control deactivated

4 -12

Frequency of wheel speed sensor signal (F515)
on pins B17 and B18 of the ECU is too high due
to:
-

unstable contact in wheel speed sensor
wiring

-

ABS on rear axle, right deactivated

-

ASR brake/engine control deactivated

7-1

Interruption in ABS valve (B256) on pins B6 and
B3 of the ECU

-

ABS on front axle, left deactivated

7-3

Short circuit to supply in ABS valve (B256) on
pins B6 and B3 of the ECU

-

ABS on front and rear axles deactivated

-

ASR brake control deactivated

7-5

Interruption in ABS valve (B256) on pin B6 or B3
of the ECU

-

ABS on front axle, left deactivated

7-6

Short circuit to earth in ABS valve (B256) on pins
B6 and B3 of the ECU

-

ABS on front axle, left deactivated

8-1

Interruption in ABS valve (B257) on pins B4 and
B1 of the ECU

-

ABS on front axle, right deactivated

8-3

Short circuit to supply in ABS valve (B257) on
pins B4 and B1 of the ECU

-

ABS on front and rear axles deactivated

-

ASR brake control deactivated

8-5

Interruption in ABS valve (B257) on pin B4 or B1
of the ECU

-

ABS on front axle, right deactivated

8-6

Short circuit to earth in ABS valve (B257) on pins
B4 and B1 of the ECU

-

ABS on front axle, right deactivated

9-1

Interruption in ABS valve (B258) on pins B5 and
B2 of the ECU

-

ABS on rear axle, left deactivated

9-3

Short circuit to supply in ABS valve (B258) on
pins B5 and B2 of the ECU

-

ABS on front and rear axles deactivated

-

ASR brake control deactivated

9-5

Interruption in ABS valve (B258) on pin B5 or B2
of the ECU

-

ABS on rear axle, left deactivated

9-6

Short circuit to earth in ABS valve (B258) on pins
B5 and B2 of the ECU

-

ABS on rear axle, left deactivated

10-1

Interruption in ABS valve (B259) on pins B9 and
B8 of the ECU

-

ABS on rear axle, right deactivated

10-3

Short circuit to supply in ABS valve (B259) on
pins B9 and B8 of the ECU

-

ABS on front and rear axles deactivated

-

ASR brake control deactivated

10-5

Interruption in ABS valve (B259) on pin B9 or B8
of the ECU

-

ABS on rear axle, right deactivated

10-6

Short circuit to earth in ABS valve (B259) on pins
B9 and B8 of the ECU

-

ABS on rear axle, right deactivated

13-3

Short circuit to supply in wire "switch off exhaust
brake when ABS is active" on pin A14 of the ECU

-

"Exhaust brake control" deactivated

13-5

Interruption in wire "switch off exhaust brake
when ABS is active" on pin A14 of the ECU, or
interrupted resistance (B402) in fuse box

-

"Exhaust brake control" deactivated

Fault code

Fault code description with possible cause

Symptom

ABS-D AND ABS/ASR-E

1-6

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ABS-D and ABS/ASR-E fault codes

10

DAVIE XD diagnostics manual

13-6

Short circuit to earth in wire "switch off exhaust
brake when ABS is active" on pin A14 of the ECU

-

"Exhaust brake control" deactivated

14-4

Interruption or voltage "Diagonal 1" too low on pin
A8 of the ECU

-

ABS on front and rear axles, right
deactivated

-

ASR brake/engine control deactivated

14-5

Interruption "Diagonal 1" on pin A4 and/or A9 of
the ECU

-

ABS on front and rear axles, right
deactivated

-

ASR brake/engine control deactivated

18-3

Short circuit to supply in ASR valve (B237) on pin
B16 of the ECU

-

ASR brake control deactivated

18-5

Interruption in ASR valve (B237) on pin B7 and/or
B16 of the ECU

-

ASR brake control deactivated

18-6

Short circuit to earth in ASR valve (B237) on pin
B7 and/or B16 of the ECU

-

ASR brake control deactivated

23-5

Interruption or short circuit to earth in ABS
warning indicator on pin A15 of the ECU

-

No noticeable system response

231-5

No communication possible via V-CAN on pins
A1 and A3 of the ECU due to:
-

open connection

-

ASR brake/engine control deactivated

231-6

No communication possible via V-CAN on pins
A1 and A3 of the ECU due to:
-

short circuit to earth

-

ASR brake/engine control deactivated

231-9

CAN communication error on pins A1 and A3 due
to:
-

time-out

-

ASR engine control deactivated

231-12

CAN communication error on pins A1 and A3 due
to:
-

internal ECU fault

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

253-1

Incorrect ASR configuration due to:
-

unconnected (or incompletely connected)
ASR components

-

incorrectly connected ASR components

-

ASR brake/engine control deactivated

253-2

Incorrect ASR configuration due to:
-

internal ECU fault

-

ASR brake/engine control deactivated

253-12

Incorrect ASR configuration due to:
-

internal ECU fault

-

ASR brake/engine control deactivated

254-2

Internal ECU fault

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

254-5

Interruption in central earth (G520), ABS valves

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

254-8

Increased slip due to:
-

vehicle on test bench

-

ABS on front and rear axles deactivated

254-9

ABS valve activated too long

-

ABS on front and rear axles deactivated
during the time that error is active

254-12

Internal ECU fault

-

ABS on front and rear axles deactivated

-

ASR brake/engine control deactivated

Fault code

Fault code description with possible cause

Symptom

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2-1

System inspection with DAVIE XD

ABS-D AND ABS/ASR-E

DAVIE XD diagnostics manual

10

2. SYSTEM INSPECTION WITH DAVIE XD

2.1 GENERAL

If DAVIE is being used to communicate with the

ABS/ASR electronic unit, the following points

need to be taken into account:

If ABS valve failures occur while driving, the fault

lamp will go out after switching the vehicle ignition

off and on if the fault is no longer active.

Should faults occur with the wheel speed sensors

while driving, switch the vehicle ignition off and

on; the fault lamp should then remain on if the

fault is no longer present.

The fault lamp will not go out until the vehicle has

reached a speed of at least 7 km/h.

If DAVIE XD has been used to erase faults from

the memory of the electronic unit, the fault lamp

will go out when the vehicle has reached a speed

of at least 7 km/h.

In some "direct test" functions, it is possible to

drive the vehicle while communications are taking

place between DAVIE XD and the ABS/ASR unit.

With the remaining "direct test" functions,

communications between DAVIE XD and the

electronic unit will be interrupted.

If a new ABS/ASR electronic unit is fitted, the unit

will "recognise" whether the vehicle has an ASR

system when the vehicle ignition is switched on.

If an electronic unit is subsequently fitted in a

vehicle that does not have an ASR system, the

unit will always output ASR error messages.

Whenever an ABS/ASR electronic unit is

replaced, it is therefore important to reset the unit

using DAVIE/XD.

ABS-D AND ABS/ASR-E

2-2

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System inspection with DAVIE XD

10

DAVIE XD diagnostics manual