Content .. 171 172 173 174 ..

DAF 95XF. Manual - part 173

200438

1-17

AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual

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

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

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

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

Content .. 171 172 173 174 ..