Version 5.0 DUT-E Installation Manual
© 2007-2011, JV Technoton 23 of 30
3. Diagnosis and troubleshooting
If there are any failures during DUT-E operation, first of all, pay attention to electric wiring
of the vehicle, if the fuel tank is clean and electric connectors.
ATTENTION!
Strong oxidation of the ground switch contacts or its failure can lead to a
distortion of the DUT-E output signal.
ATTENTION!
DUT-E indications will be incorrect if DUT-E tubes are closed with current-
conductive dirt or water!
3.1 Diagnosis and troubleshooting of analog DUT-E
The efficiency of the
analog
DUT-E can be checked with a voltmeter by means of
measuring the output voltage and verifying it with the data from Table 8.
Table 8. Malfunction of
analog
DUT-E
Output voltage, V
Malfunction reason
Troubleshooting
From 0.65 to 4.6 for DUT-E
А
5
From 0.65 to 9.2 for DUT-E
А
10
No failures, normal
operation
Check the recording and
display devices
More than 4.6 for DUT-E
А
5
More than 9.2 for DUT-E
А
10
Tubes of the measuring
part are
"
closed
"
;
particles, dirt or water in
the tank
Clean the DUT-E and the fuel
tank of the vehicle
Less than 0.65
for DUT-E
А
5 and DUT-E
А
10
No contact of the
measuring part with the
electronic board; failures
in the electronic board;
cutting for more than
30%; no power
Give power supply to DUT-E
Contact a regional service
center