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23/04/2019
Rev 3
36
2) If the probe is disconnected, the message remains active:
Check the flow with a flow meter.
If the flow is between the minimum flow and the nominal flow, it is necessary for Maintenance to
open the machine to check the pressure switch and if necessary calibrate it using a pressure
sensor at a trigger pressure of 160 mbar, or even to replace it.
If on the other hand the flow is outside the acceptable range indicated at the rear of the machine,
it is necessary to open the machine to check what, in the pneumatic circuit, is reducing flow. If no
flexible tube seems twisted, kinked or plugged, check the electro valves and finally replace the
pump diaphragms if necessary.
.
II.6.9.HC residue in gas inlet
When a measurement is carried out on ambient air, if the CO
2
concentration is below 2% by
volume for more than twenty seconds while the HC measurement gives more than 20 ppm, it is
assumed that hydrocarbon residues are present in the inlet tract.
These residues may also be in the ambient air. One must therefore ensure that the work area is
well ventilated. It may be necessary to clean the probe. If the problem appears again, clean the
separator.
If the HC measurement drops back to a level below 20 ppm for more than 20 seconds, this
message disappears, a zero operation is carried out and the message “measurement in progress”
appears.
II.6.10.Error com. (bench)
Check that the device is grounded. Extensions for the power supply cable are absolutely required
to include a ground connector as well as the power supply plug.
Communication between the main card and the test set is defective. First, check that the power
supply and communication cables are correctly connected and that the “happy LEDs” are blinking.
Connect the infrared set to a computer and check that it is communicating correctly with the
maintenance program. Next, check that at the Tx pin of the main card, a signal is regularly
transmitted. Depending on the problem encountered, replace the defective component..
II.6.11.Adjustment necessary
Call Maintenance: adjustment with the help of a calibration gas is necessary. This message
indicates excessive drift in the machine.
Содержание EOBD
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Страница 7: ...23 04 2019 Rev 3 4 I 2 Overview I 2 1 The Station ...
Страница 10: ...23 04 2019 Rev 3 7 I 2 4 Smoke meter Exhaust probe ...
Страница 13: ...23 04 2019 Rev 3 10 CAP4XXX RPM via the EOBD Allows to measure the RPM from the vehicle embedded computer ...
Страница 23: ...23 04 2019 Rev 3 20 II 1 3 Gas flow circuit diagram ...
Страница 63: ...23 04 2019 Rev 3 60 ...