Vehicle Testing

Troubleshoot The High Mobility Multi- Purpose Wheeled Vehicle (HMMWV)
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Confidence Tests. The VTM has two built in self-test features.

The first of these is the confidence test.

The confidence test

provides an overall performance check of the VTM and includes

programmed isolation to assist in IDS maintenance.

The confidence

test should be run immediately after power has been applied to the

VTM.

To run the confidence test, the following procedures must be

observed and/or performed.

First, ensure that the VTM is correctly connected to the vehicle to

be tested and that sufficient operating power is available.

The

display should show .8.8.8.8, then change to four dashes (- - - -).

Next, set the TEST SELECT switches to 66 and press and release the

TEST button. The display should show 0066. When 0066 appears on the

display, set the TEST SELECT switches to 99 and again press and

release the TEST button. Observe the displayed readout. The display

should show 0099 and then go blank.

When performing this step,

observe the