ROD AS 2621922 - Caterpillar

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Digital MultimeterUse 181 980.2 Digital Multimeter or equivalent for making continuity checks or voltage measurements. 365 747.0 Cable Probe Group is used to make measurements at connectors without disconnecting them.Caterpillar Electronic Technician (ET)The Caterpillar Electronic Technician (ET) is a software program that can be used on an IBM compatible personal computer. CAT ET has the capability of downloading software into the electronic control modules (EMC, RHC and CCM). Also, CAT ET provides the same diagnostics that are available through the EMC, as detailed in this service manual. CAT ET connects to the machine at the Diagnostic And Maintenance (DAM) connector. The DAM connector is located next to the main fuse panel.The necessary items for using CAT ET on the Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors are:
A Personal Computer. Which is: IBM PC compatible with a 386 25MHz SL or SXL processor, 4 Mb of RAM, 10 Mb of available hard disk space, 3.5 inch 1.44 Mb diskette drive, MS or PC DOS 5.0 or greater, Microsoft Windows version 3.1, RS232 port not used by mouse/printer.
360 270.0 Challenger To PC For more information please see separate service information.