DAF 95XF. Manual - part 163

 

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DAF 95XF. Manual - part 163

 

 

©

 200438

1-5

UPEC fault codes

UPEC

DAVIE XD diagnostics manual 

2

34-8

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

mechanical problems

-

internal contamination

-

No noticeable system limitation in UPEC

35-1

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

35-2

Short circuit to earth or interruption in the pump 
unit (B132) on pin A33 of the ECU, causing the 
pump unit of cylinder 2 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 (B132) on 
pin A33 of the ECU

-

Engine stalls and/or engine starts but does 
not fire

Interruption in the pump unit (B132) 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

35-4

The valve inside the pump unit (B132) 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 (B132) does not 
close fast enough due to:
-

internal contamination

-

internal wear

-

Reduced engine output

35-8

The valve inside the pump unit (B132) does not 
open fast enough due to:
-

mechanical problems

-

internal contamination

-

No noticeable system limitation in UPEC

36-1

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

36-2

Short circuit to earth or interruption in the pump 
unit (B134) on pin A28 of the ECU, causing the 
pump unit of cylinder 4 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 (B134) on 
pin A28 of the ECU

-

Engine stalls and/or engine starts but does 
not fire

Interruption in the pump unit (B134) 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

36-4

The valve inside the pump unit (B134) 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 (B134) does not 
close fast enough due to:
-

internal contamination

-

internal wear

-

Reduced engine output

Fault code

Fault code description with possible cause

Symptom

UPEC

1-6

©

 200438

UPEC fault codes

2

DAVIE XD diagnostics manual

36-8

The valve inside the pump unit (B134) does not 
open fast enough due to:
-

mechanical problems

-

internal contamination

-

No noticeable system limitation

41-1

Voltage level of crankshaft sensor (F552) sine-
wave signal on pins A1 and A13 of the ECU is too 
low due to:
-

too large an air gap between flywheel and 
crankshaft sensor

-

contact resistance in connection points

-

short circuit or interruption

-

No engine speed signal on pin B5 of the 
ECU

Excessive oscillation of crankshaft sensor (F552) 
sine-wave signal on pin A1 of the ECU due to:
-

irregularity in flywheel circumference

-

faulty fitting of the flywheel

-

No noticeable system limitation in UPEC

41-2

Too low a voltage level of camshaft sensor (F558) 
sine-wave signal on pins A2 and A14 of the ECU 
due to:
-

too large an air gap between pulse disc and 
camshaft sensor

-

contact resistance in connection points

-

short circuit or interruption

-

Longer start time before engine fires

Excessive oscillation of camshaft sensor (F558) 
sine-wave signal on pins A2 and A14 of the ECU 
due to:
-

irregularity in pulse disc circumference

-

faulty fitting of the pulse disc

-

Longer start time before engine fires

41-8

Incorrect or unacceptable sine-wave signals of 
both the crankshaft sensor (F552) and camshaft 
sensor (F558) due to:
-

contact resistance in connection points

-

defective ECU

-

interruption or short circuit in crankshaft 
sensor and camshaft sensor

-

Engine stalls and/or engine starts but does 
not fire

42-1

Signal of crankshaft sensor (F552) on pins A1 en 
A13 of ECU fails due to:
-

poor connection/bad contact

-

faulty sensor

-

No engine speed signal on pin B5

42-2

Synchronisation of crankshaft sensor signal and 
camshaft sensor signals is not correct due to:
-

loose pulse disc

-

incorrect timing setting

-

signal disturbance caused by external 
influences

-

Engine starts but will not fire

42-4

Missing or unacceptable sine-wave signal of 
crankshaft sensor (F552) due to:
-

interruption on pin A1 and/or A13 of the ECU

-

short circuit to earth on pin A1 of the ECU

-

short circuit to supply on pin A1 of the ECU

-

short circuit between pins A1 and A13 of the 
ECU

-

No engine speed signal on pin B5 of the 
ECU

Fault code

Fault code description with possible cause

Symptom

©

 200438

1-7

UPEC fault codes

UPEC

DAVIE XD diagnostics manual 

2

42-8

Unacceptable sine-wave signal of crankshaft 
sensor (F552) due to:
-

missing hole in flywheel, for example due to 
fouling

-

No noticeable system limitation in UPEC

43-1

Interruption or short circuit/short circuit to supply/
short circuit to earth in the camshaft sensor 
(F558) on pin A2 and/or A14 of the ECU

-

Longer start time before engine fires

43-2

Unacceptable sine-wave signal of camshaft 
sensor (F558) due to:
-

loose pulse plate

-

Longer start time before engine fires

43-4

Missing or unacceptable sine-wave signal of 
camshaft sensor (F558) due to:
-

interruption on pin A2 and/or A14 of the ECU

-

short circuit to earth on pin A2 of the ECU

-

short circuit to supply on pin A2 of the ECU

-

short circuit between pins A2 and A14 of the 
ECU

-

Longer start time before engine fires

43-8

Synchronisation signal from camshaft sensor 
(F558) faulty or missing under dynamic 
conditions due to:
-

contact resistance in connection points of 
camshaft sensor

-

faulty camshaft sensor

-

mechanical damage of the pulse plate or 
camshaft sensor

-

interruption on pin A14 of the ECU

-

too low a voltage level of camshaft signal

-

Longer start time before engine fires

44-1

Excessive engine speed caused by:
-

downhill driving

-

incorrect changing down into a lower gear

-

No noticeable system limitation in UPEC

45-1

Signal measurement via coolant temperature 
sensor (F566) not correct due to:
-

interruption on pin A22 and/or A5 of the ECU

-

Thermometer gives no reading

-

ECU switches to default replacement value 
for engine coolant temperature

45-2

Signal measurement via coolant temperature 
sensor (F566) not correct due to:
-

short circuit to earth on pin A22 of the ECU

-

short circuit between pins A22 and A5 of the 
ECU

-

Thermometer gives no reading

-

ECU switches to default replacement value 
for engine coolant temperature

45-4

No signal measurement via coolant temperature 
sensor (F566) due to:
-

internal ECU fault

-

Thermometer gives no reading

-

ECU switches to default replacement value 
for coolant temperature

46-1

Boost pressure signal measurement via inlet air 
boost pressure/temperature sensor (F649) not 
correct due to:
-

short circuit to supply on pin A12 and/or A23 
of the ECU

-

Reduced engine output

-

ECU switches to default replacement value 
for boost pressure

46-2

Boost pressure signal measurement via inlet air 
boost pressure/temperature sensor (F649) not 
correct due to:
-

interruption on pin A23 and/or A12 of the 
ECU

-

short circuit to earth on pin A23 and/or A12 
of the ECU

-

Reduced engine output

-

ECU switches to default replacement value 
for boost pressure

Fault code

Fault code description with possible cause

Symptom

UPEC

1-8

©

 200438

UPEC fault codes

2

DAVIE XD diagnostics manual

46-4

No boost pressure signal measurement via inlet 
air boost pressure/temperature sensor (F649) 
due to:
-

internal ECU fault

-

Reduced engine output

-

ECU switches to default replacement value 
for boost pressure

47-1

Inlet air temperature signal measurement via inlet 
air boost pressure/temperature sensor (F649) not 
correct due to:
-

interruption on pin A21 and/or A17 of the 
ECU

-

ECU switches to default replacement value 
for inlet air temperature

47-2

Inlet air temperature signal measurement via inlet 
air boost pressure/temperature sensor (F649) not 
correct due to:
-

short circuit to earth on pin A21 of the ECU

-

short circuit between pins A21 and A17 of 
the ECU

-

ECU switches to default replacement value 
for inlet air temperature

47-4

No inlet air temperature signal measurement via 
inlet air boost pressure/temperature sensor 
(F649) due to:
-

internal ECU fault

-

ECU switches to default replacement value 
for inlet air temperature

48-1

Signal measurement via fuel temperature sensor 
(F565) not correct due to:
-

interruption on pin A6 and/or A11 of the ECU

-

ECU switches to default replacement value 
for fuel temperature

48-2

Signal measurement via fuel temperature sensor 
(F565) not correct due to:
-

short circuit to earth on pin A11 of the ECU

-

short circuit between pins A11 and A6 of the 
ECU

-

ECU switches to default replacement value 
for fuel temperature

48-4

No fuel temperature signal measurement via fuel 
temperature sensor (F565) due to:
-

internal ECU fault

-

ECU switches to default replacement value 
for fuel temperature

51-1

Signal measurement on potentiometer in 
accelerator pedal sensor (F672) not correct due 
to:
-

short circuit to supply on pin B23 of the ECU

-

interruption on pin B35 of the ECU

-

short circuit between pin B16 and pin B23 of 
the ECU

-

moisture in connector connection

-

Indistinct response to accelerator pedal

-

Engine runs at increased idling speed

51-2

Signal measurement on potentiometer in 
accelerator pedal sensor (F672) not correct due 
to:
-

interruption on pin B16 and/or pin B23 of the 
ECU

-

short circuit to earth on pin B16 and/or pin 
B23 of the ECU

-

short circuit between pin B16 and pin B35 of 
the ECU

-

short circuit between pin B23 and pin B35 of 
the ECU

-

moisture in connector connection

-

Indistinct response to accelerator pedal

-

Engine runs at increased idling speed

51-4

No signal measurement on potentiometer in 
accelerator pedal sensor (F672) due to:
-

internal ECU fault

-

Indistinct response to accelerator pedal

-

Engine runs at increased idling speed

Fault code

Fault code description with possible cause

Symptom

 

 

 

 

 

 

 

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