DAF 95XF. Manual — part 173

©

200438

1-17

AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual

3

3155

Main range does not switch in selected gear:
-

insufficient air pressure available

-

internal modulator fault (D954); selector
valves Y6/Y7 are not actuated correctly

-

mechanically defective gearbox

-

Gearbox does not disengage from the
neutral position within a certain period of
time or the selected gear is not reached
within a certain period of time

-

If the above fault occurs when driving or
during standstill, the gearbox will
automatically shift to the neutral position

-

Automatic mode not available

3156

Main range engages a gear which does not
correspond with the position sensor signal from
the main range

-

When driving and at standstill the gearbox is
automatically shifted to the neutral position If
the neutral position cannot be reached, the
clutch will remain open.

-

Automatic mode not available

3157

Gate selection sensor signal changes when
driving, without a new gear being selected

-

Main valve Y10 and selector valve Y4 or Y5
for gate selection are actuated cyclically to
ensure the position of the engaged gear

-

Automatic mode available

3158

Main range sensor signal changes when driving,
without a new gear being selected

-

Main valve Y10 and selector valve Y6 or Y7
for main range are actuated to ensure the
position of the engaged gear

-

If the last selected gear can no longer be
engaged mechanically, a gear
corresponding with the current vehicle
speed is shifted

-

Automatic mode available

3159

The rear-mounted range box sensor signal
changes when driving, without a new gear being
selected

-

Main valve Y10 and selector valve Y8 or Y9
for rear-mounted range box are actuated to
ensure the position of the engaged gear

-

If the last selected gear can no longer be
engaged mechanically, a gear
corresponding with the current vehicle
speed is shifted

-

Automatic mode available

3160

The splitter range sensor signal changes when
driving, without a new gear being selected

-

Main valve Y10 and selector valve Y2 or Y3
for splitter range and Y6 or Y7 for main
range are actuated to ensure the position of
the engaged gear

-

If the last selected gear can no longer be
engaged mechanically, a gear
corresponding with the current vehicle
speed is shifted

-

Automatic mode available

3163

Incorrect or missing engine speed increase signal
via message on CAN network

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

driving off from a stationary position is
possible, although the clutch and shifting
comfort will be affected

Fault code

Fault code description with possible cause

Symptom

AS TRONIC

1-18

©

200438

AS Tronic fault codes

3

DAVIE XD diagnostics manual

3166

Incorrect accelerator pedal potentiometer signal
via message on CAN network:
-

accelerator pedal position exceeds
stationary position and stationary signal is
active

When driving:
-

shifting is possible

-

automatic mode not available

At standstill:
-

driving off from a stationary position and
shunting are not possible

-

system is not available

3169

Post-switch function for supply voltage of
modulator (D954) does not switch off:
-

pins A11 and B18 of modulator (D954) will
still receive supply voltage after the ignition
has been switched off

-

modulator outputs cannot be switched

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3170

Incorrect modulator supply voltage or incorrect
post-switch function for modulator supply voltage
during self-test:
-

pin A4/A5 of modulator (D954) without
supply voltage when ignition is switched on
and off

-

pins A11 and B18 of modulator (D954)
without supply voltage when the ignition is
switched on

-

When driving and at standstill all modulator
and clutch unit switching is blocked

-

Current shifting and clutch positions are
maintained

-

System not available

3175

Incorrect supply voltage on modulator, power
supply after ignition, with ignition turned on and
idling engine:
-

pin A1 of modulator (D954)

When driving:
-

no more gear changes possible

-

automatic mode not available

At standstill:
-

if the engine is idling, the drive-off gears
(forward and reverse) can be engaged

-

if the engine is not running, the gearbox
automatically shifts to the neutral position
and the modulator switches off

-

when switching the ignition off and on, the
self-test will not be finished successfully and
the system will not be available

3177

No CAN communication possible between any
vehicle systems due to problems with the V-CAN:
-

short circuit to earth, short circuit to supply or
interruption on pin A8/A12 and/or pin A13/
A14 of modulator

-

defective modulator (D954)

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

Fault code

Fault code description with possible cause

Symptom

©

200438

1-19

AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual

3

3178

Warning CAN communication between all vehicle
systems possibly not OK

-

When driving:

-

no gear changes possible

-

automatic mode not available

-
-

At standstill:

-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3179

Overloaded CAN communication system
between all vehicle systems. Not all CAN
messages can be sent in the same cycle.

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3180

No CAN message received from engine
management (UPEC) due to:
-

communication problem with the engine
management (UPEC)

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3181

No CAN message received from engine
management (UPEC) due to:
-

communication problem with the engine
management (UPEC)

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3182

Incorrect or missing cruise control vehicle speed
signal received via CAN message due to:
-

communication problem with the engine
management (UPEC)

-

Wheel speed signals are missing

-

Automatic mode not available

-

When the vehicle is coasting, the clutch will
be opened at a vehicle speed exceeding
1.5 km/h.

3183

Incorrect or missing engine brake signal received
via CAN message from engine management
(UPEC) due to:
-

communication problem with the engine
management (UPEC)

-

If the engine brake is active, this may affect
the shifting quality when shifting is started

-

No further system limitation

-

Automatic mode not available

Fault code

Fault code description with possible cause

Symptom

AS TRONIC

1-20

©

200438

AS Tronic fault codes

3

DAVIE XD diagnostics manual

3184

No CAN message received from the intarder
(EST 42) due to:
-

communication problem with intarder
(EST 42)

-

No noticeable system limitation

-

Automatic mode not available

3188

Internal modulator fault (D954) due to:
-

missing or defective basic program(s)

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3189

Internal modulator fault (D954) due to:
-

missing or defective basic program(s)

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3190

Internal modulator fault (D954) due to:
-

missing or defective basic program(s)

-

fault recognised during self-test

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3191

Internal modulator fault (D954) due to:
-

missing or defective basic program(s)

-

fault recognised during self-test

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch will
open and the gearbox is automatically
shifted to the neutral position

-

driving off from a stationary position is not
possible

-

system is not available

3192

Internal modulator fault (D954) due to:
-

communication problem between
processors in modulator

-

If the fault still occurs after the ignition has
been switched off and on, an average drive-
off gear will be selected when driving off
from a stationary position

-

No noticeable system limitation

-

Automatic mode not available

Fault code

Fault code description with possible cause

Symptom