DAF 95XF. Manual — part 162

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200438

1-1

UPEC fault codes

UPEC

DAVIE XD diagnostics manual

2

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

1-2

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UPEC fault codes

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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

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UPEC fault codes

UPEC

DAVIE XD diagnostics manual

2

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

UPEC

1-4

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UPEC fault codes

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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