EElleeccttrriiccaal l ssyysstteemm 1100..1111
CChhaassssiiss AATTLLEET T SSEERRVVIICCE E MMAANNUUAALL
1100..33 CChhaassssiiss
0
0
1010.3.3.1.1 ChChececkiking tng the Ahe ATC - cTC - chhasassisis cos connnnecectitionon
(This is performed in combination with service and replacing of the ATC).(This is performed in combination with service and replacing of the ATC).
1.1. This This shshoulould be d be chcheckecked ed usiusing ng a caa caliblibratrated ed DMM DMM in in ordorder ter too
determine whether the determine whether the AATC makes good contact with TC makes good contact with the rest ofthe rest of
the chassis. Set the digital multimeter the chassis. Set the digital multimeter to resistanceto resistance
measumeasuremenrement, met, measurasuremenement rangt range 2e 200 Oh00 Ohm.m. . T. Touch ouch thethe
measurement probes together and read off the display. The valuemeasurement probes together and read off the display. The value
ougought tht to bo be 0.e 0.0 to 0 to appapproxrox. 0. 0.6 .6 OhmOhm.. ..
2.2. ConConnecnect one ot one of the mef the measuasureremenment prot probes tbes to one of to one of the bhe brigright scht screw hrew headeads ons on
the ATC box and the other probe to the screw for the chassis connection,the ATC box and the other probe to the screw for the chassis connection,
(located on the (located on the battery wall battery wall under the Aunder the ATC connection green/yellow cable).TC connection green/yellow cable).
The value read off should not be more than max. 0.5 Ohm higher than theThe value read off should not be more than max. 0.5 Ohm higher than the
read off value under point 1.read off value under point 1.
3.3. If the vIf the valualue is hie is highegher make r make a chea check on sck on some ome of thof the othe other scer screwrews on ths on the Ae ATCTC
box. If this does not help the screw for box. If this does not help the screw for the chassis connection must bethe chassis connection must be
checked. First check by measuring this across another clean metal surface, checked. First check by measuring this across another clean metal surface, ifif
the value is also too high the thread for the value is also too high the thread for the chassis connection should bethe chassis connection should be
cleaned using a plug tap and a new check should be performed.cleaned using a plug tap and a new check should be performed.
Important!Important!
Chassis faults should always be rectified during the serviciChassis faults should always be rectified during the servicing.ng.
1010.3.3.2.2 PPototenenttiaial l memeasasururememeentnt
The potential measurement on the chassis is The potential measurement on the chassis is performed with a voltage dividerperformed with a voltage divider
connected between B+ and B-, with connected between B+ and B-, with the centre outlet connected to the the centre outlet connected to the chassis. Thechassis. The
voltage divider has sufficiently large voltage divider has sufficiently large resistances to comply with EU's insulationresistances to comply with EU's insulation
requirements at the same time requirements at the same time as potential changes can be measured via as potential changes can be measured via an analoguean analogue
input on the ATC.input on the ATC.
If voltage is discovered on the chassis an error code is displayed. The error code isIf voltage is discovered on the chassis an error code is displayed. The error code is
stored together with the time and date in tstored together with the time and date in the error log.he error log.
ΩΩ
ΩΩ
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