DAF LF45, LF55 Series. Manual — part 12
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1-15
UPEC fault codes
UPEC
DAVIE XD diagnostics manual
2
65-2
No CAN message received from transmission
ECU due to:
-
communication problem with transmission
ECU
-
No noticeable system limitation in UPEC
Communication problem via V-CAN on pin B11 or
pin B12 of the ECU due to:
-
interruption on pin B11 or B12 of the ECU
-
short circuit to supply on pin B11 or B12 of
the ECU
-
Rev counter gives no reading
-
Thermometer gives no reading
Communication problem via V-CAN on pin B12 of
the ECU due to:
-
short circuit to earth on pin B12 of the ECU
-
Rev counter gives no reading
66-2
No CAN message received from transmission
ECU due to:
-
communication problem with transmission
ECU
-
No noticeable system limitation in UPEC
Communication problem via V-CAN on pin B11 or
pin B12 of the ECU due to:
-
interruption on pin B11 or B12 of the ECU
-
short circuit to supply on pin B11 or B12 of
the ECU
-
Rev counter gives no reading
-
Thermometer gives no reading
Communication problem via V-CAN on pin B12 of
the ECU due to:
-
short circuit to earth on pin B12 of the ECU
-
Rev counter gives no reading
67-2
No CAN message received from transmission
ECU due to:
-
communication problem with transmission
ECU
-
No noticeable system limitation in UPEC
Communication problem via V-CAN on pin B11 or
pin B12 of the ECU due to:
-
interruption on pin B11 or B12 of the ECU
-
short circuit to supply on pin B11 or B12 of
the ECU
-
Rev counter gives no reading
-
Thermometer gives no reading
Communication problem via V-CAN on pin B12 of
the ECU due to:
-
short circuit to earth on pin B12 of the ECU
-
Rev counter gives no reading
68-1
No CAN message received from transmission
ECU due to:
-
communication problem with transmission
ECU
-
No noticeable system limitation in UPEC
Communication problem via V-CAN on pin B11 or
pin B12 of the ECU due to:
-
interruption on pin B11 or B12 of the ECU
-
short circuit to supply on pin B11 or B12 of
the ECU
-
Rev counter gives no reading
-
Thermometer gives no reading
Communication problem via V-CAN on pin B12 of
the ECU due to:
-
short circuit to earth on pin B12 of the ECU
-
Rev counter gives no reading
Fault code
Fault code description with possible cause
Symptom
UPEC
1-16
©
UPEC fault codes
2
DAVIE XD diagnostics manual
69-1
No communication with immobiliser when
switching on the ignition, or immobiliser code
does not correspond with UPEC code due to:
-
defective immobiliser
-
ignition key not adjusted to the immobiliser
-
immobiliser not matched to UPEC ECU
-
voltage on pin B15 but no voltage on pins B3
and B4 of the ECU
-
Engine starts but will not fire
Communication problem via V-CAN on pin B11
and/or pin B12 of the ECU due to:
-
interruption on pin B11 and/or pin B12 of the
ECU
-
short circuit to supply on pin B11 of the ECU
-
Engine starts but will not fire
-
Several systems will output error messages
in connection with the CAN communication
Communication problem via V-CAN on pin B12 of
the ECU due to:
-
short circuit to supply on pin B12 of the ECU
-
Several systems will output error messages
in connection with the CAN communication
71-1
Short circuit to supply of glow relay (G014) on pin
B10 of the ECU
-
Glow function cannot be activated
71-2
Short circuit to earth of glow relay (G014) on pin
B10 of the ECU
-
Glow function permanently activated
71-8
Interruption in glow relay (G014) on pin B10 of the
ECU
-
Glow function cannot be activated
73-1
Short circuit to supply of exhaust brake solenoid
valve (B192) on pin B9 of the ECU
-
Exhaust brake cannot be activated
73-2
Short circuit to earth of exhaust brake solenoid
valve (B192) on pin B9 of the ECU
-
Exhaust brake permanently activated
No supply voltage on glow relay, exhaust brake
and DEB due to faulty fuse
-
Glow function cannot be activated
-
Exhaust brake cannot be activated
-
DEB cannot be activated
73-8
Interruption in exhaust brake solenoid valve
(B192) on pin B9 of the ECU
-
Exhaust brake cannot be activated
74-1
Short circuit to supply of connection point for DIP
stop indicator on pin B6 of the ECU
-
No noticeable system limitation in UPEC
74-2
Short circuit to earth of connection point for DIP
stop indicator on pin B6 of the ECU
-
No noticeable system limitation in UPEC
74-8
Interruption in connection point for DIP stop
indicator on pin B6 of the ECU
-
No noticeable system limitation in UPEC
75-1
Short circuit to supply of DEB solenoid valve
(B247) on pin B18 of the ECU
-
Reduced braking power of DEB
75-2
Short circuit to earth of DEB solenoid valve
(B247) on pin B18 of the ECU
-
DEB permanently activated
-
Irregular engine running
75-8
Interruption in DEB solenoid valve (B247) on pin
B18 of the ECU
-
Reduced braking power of DEB
77-1
Short circuit to supply of DEB solenoid valve
(B248) on pin A8 of the ECU
-
Reduced braking power of DEB
77-2
Short circuit to earth of DEB solenoid valve
(B248) on pin A8 of the ECU
-
DEB permanently activated
-
Irregular engine running
77-8
Interruption in DEB solenoid valve (B248) on pin
A8 of the ECU
-
Reduced braking power of DEB
Fault code
Fault code description with possible cause
Symptom
©
1-17
UPEC fault codes
UPEC
DAVIE XD diagnostics manual
2
78-1
Short circuit to supply of electronically controlled
fan clutch (B335) on pin A9 of the ECU
-
Fan speed too high
78-2
Short circuit to earth of electronically controlled
fan clutch (B335) on pin A9 of the ECU
-
Fan speed too low
78-8
Speed of electronically controlled fan clutch
(B335) cannot be controlled due to:
-
interruption on pin A9 and/or A16 of the ECU
-
interruption on pins A9 and B30 of the ECU
-
Fan speed is no longer controlled and
increases to maximum
81-8
When the steering column switch is operated,
several input signals are present at the ECU at
the same time due to:
-
short circuit to supply on pin B34 of the ECU
-
Cruise control function cannot be activated
-
At the steering column switch the "RES"
function is overruled by the "Set+" function
When the steering column switch is operated,
several input signals are present at the ECU at
the same time due to:
-
short circuit to supply on pin B32 of the ECU
-
Cruise control function cannot be activated
-
At the steering column switch the "RES"
function is overruled by the "Set-" function
When the steering column switch is operated,
several input signals are present at the ECU at
the same time due to:
-
short circuit to supply on pin B33 of the ECU
-
"RES" function at the steering column switch
cannot be activated
When the steering column switch is operated,
several input signals are present at the ECU at
the same time due to:
-
short circuit to supply on pin B24 of the ECU
-
Cruise control function cannot be activated
-
Control function for engine speed control
cannot be activated
82-4
Input signal, via clutch pedal proximity switch
(E575), on pin B20 of the ECU remains present,
despite the fact that the vehicle has already
reached a certain speed. This is due to:
-
defective proximity switch
-
short circuit to supply on pin B20
-
towing the vehicle with the engine running
-
No system response when operating the
clutch pedal
83-1
Short circuit to supply on pin B28 of the ECU
-
Engine speed/torque limiting control cannot
be activated
83-8
Unacceptable load on pin B28 of the ECU due to:
-
excessive contact resistance on connection
point
-
Engine speed/torque limiting control cannot
be activated
Fault code
Fault code description with possible cause
Symptom
UPEC
1-18
©
UPEC fault codes
2
DAVIE XD diagnostics manual
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