In order to prevent damage or short-circuiting of the on-board electronic control units, the following operations must be always carried out before starting any welding operation on the chassis. - If electric welding has to be done on the vehicle, 112514 isolate the electric system as follows: a) disconnect the power lead from the battery positive terminal and connect it to the chassis earth; b) disconnect the power lead from the battery negative terminal; c) disconnect the electronic control unit connectors, taking care to avoid touching the control unit connector pins. - Moreover:
a) should it be necessary to carry out welding operations close to the control unit, remove it from its location. b) whenever possible, earth the welding machine directly to the piece that has to be welded. In the caseofvehiclesequipped witha DTCO digital tachograph, donot disconnect the battery leads andthen connect them by jumpers to reset the electronic systems. This operation should be avoided, as it could cause permanent damage to the DTCO tachograph CARD or other on-board electronic systems. To reset the electronic system without running risks, disconnect the vehicle battery and wait for 10 minutes.
It is strictly forbidden to carry out any modificationsor connections to the electronic control unitwiring; in particular, the line interconnecting data between the control units (CAN line) must be considered as untouchable. Diagnostic and maintenance operations can only be carried out by authorised personnel with IVECO approved equipment. Print 603.93.641 Base - November 2006 VII