INTRODUCTION STE/ICER (SIMPLIFIED TEST EQUIPMENT FOR INTERNAL
COMBUSTION ENGINES-REPROGRAMMABLE) PROCEDURESContinued
Vehicle Test Meter (VTM)
The VTM is the diagnostic meter of STE/ICER used for testing electrical and mechanical components of the M548A1 or
M548A3 engine. The VTM consists of three switches, a readout display, flip cards, and four cable connectors.
The three switches are a PUSH ON/PULL OFF switch, TEST SELECT switch and
TEST button. 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. The TEST button has two
functions: (1) when pressed and released, it initiates selected test; (2) when pressed
and held, it initiates an offset test.
b. READOUT DISPLAY.
The readout display gives five different types of messages during testing and up to a
maximum of four characters per message. The readout display messages can be
found on (WP 0107 00). The types of messages are:
confidence test error.
c. FLIP CARDS.
The flip cards, attached to the front of the VTM, provide a quick but limited
reference for the operator. These flip cards list test numbers, messages, and some
procedures. Test limits are also provided for some vehicles.