TM 5-3810-305-23
FIELD MAINTENANCE
MSD-ICE TROUBLESHOOTING AND TEST PROCEDURE
INITIAL SETUP:
References (cont.)
Tools and Special Tools
Tool Kit, General Mechanic's (WP 0171, Table 1,
Item 17)
Test Set, Electronic Systems (MSD) (WP 0171,
Table 1, Item 7)
References
TM 9-4910-571-12&P
GENERAL
To troubleshoot a vehicle problem, the technician can use MSD-ICE VTM (Vehicle Test Meter and transducer).
DATA ENTRY TESTS
For information regarding Data Entry, Cylinder Entry, and Data Display Tests, refer to TM 9-4910-571-12&P.
OFFSET TESTS
The MSD-ICE VTM performs a test by setting the TEST SELECT switches to the test number and then pressing the
TEST button. For some tests, an offset test is required before the test itself can be performed. This is done by
selecting the number of the desired test and holding the TEST button down for several seconds. The offset test nulls
characteristic differences in the VTM, test leads, and transducer. It zeros the meter. Once the offset is performed,
the VTM automatically corrects for the offset before displaying measured values. The displayed offset value should
be checked against limits given in the test procedures. If the displayed value is outside these limits, either the
transducer or the test cable is faulty and must be replaced. This is a form of a self-test. Perform the offset test when
each transducer is connected. The offset test is performed with the test probe cable in TK mode or the DCA plug
connected to the VTM. Ensure that no stimulus is applied to the transducer in TK mode. Test probe cable leads
should be shorted together. To perform an offset test, dial the test number into the TEST SELECT switches. Press
and hold the TEST button, until the prompting message CAL appears on the display. A few seconds after the TEST
button is released, a number will appear. This is the measured offset value associated with the test probe cable or
transducer and cable.
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