TM 9-2350-261-20-1(1) Vehicle test meter (VTM). The VTM is the diagnostic meter of STE/ICE-R used for testing electrical andmechanical components of the M113A2, M577A2, M106A2, M125A2, M741A1, M901A1, or M1059engine. The VTM consists of 3 switches, a readout display, flip cards and 4 cable connectors.(a) Switches. The three switches are a PUSH ON/PULL OFF switch, TEST SELECT switch and TESTbutton. The PUSH ON/PULL OFF’ switch is used to control power to the VTM from the power source.The TEST SELECT switch are two ten-position switches used to select the test to be performed. TheTEST button has two functions: (1) when pressed and rebased it initiates selected test; (2) pressedand held it initiates an offset test.(b) Readout display. The readout display gives five different types of messages during testing and up to amaximum of four characters per message. The types of messages are:l errorl statusl numericall promptingl confidence test errorReadout display messages can be found on page 3-3.(c) Flip cards. The flip cards, attached to the front of the VTM, provide a quick but limited reference forthe operator. These flip cards list test numbers, messages, and some procedures. Test limits are alsoprovided for some vehicles.3-238 Change 1
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