VDO DTCO 4.0 Instruction Manual page 100

Messages
Message
8
! time conflict
! DSRC commu-
nication mal-
function
! driving
without valid
card
!1 Insert
while driving
!1 Time over-
lap
!1 Card invalid
100
Possible causes
There is a difference of more than one minute between the
time of the internal clock of the DTCO 4.0 and the time in-
formation from the GNSS signal.
A communication error has occurred between the
DTCO 4.0 and the external DSRC-CAN module.
Driving commenced without a driver card or without a valid
driver card in card drawer 1. The message is also displayed
if an unauthorised card combination is inserted before or
after the journey.
The driver card was inserted after driving has begun.
The set UTC time of this tachograph is behind the UTC
time of the previous tachograph. This produces a negative
time difference.
The tachograph card has either expired, is not yet valid, or
the authentication has failed.
An inserted driver card which has become invalid after a
change of day will be automatically written to and ejected
(without request) after the vehicle becomes stationary.
Overview of possible events
Measure
Confirm message.
Confirm message.
In case of repeated occurrences, consult
an authorised specialist workshop.
Confirm message.
Stop vehicle and insert valid driver card.
If necessary, remove inserted company
card/control card from the DTCO 4.0.
Confirm message.
Confirm message.
Confirm message.Identify the tacho-
graph with the incorrect UTC time and
make sure that an authorised specialist
workshop inspects and corrects the
tachograph.
Confirm message.
Check tachograph card and insert it
again.
Operating instructions DTCO 4.0 - Edition 11.2018 - A2C19916900