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DAF 95XF. Manual - part 162

200438

1-1

UPEC fault codes

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

1-2

200438

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

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

200438

1-3

UPEC fault codes

UPEC

DAVIE XD diagnostics manual

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

200438

UPEC fault codes

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

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