Table 2-13. Prompting Messages

TM 9-2320-279-20-1

Instructions (Cent)

2-16.

TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINES

(2) Prompting Message. A prompting message is an operator action message. It is a signal to do

something, such as crank the engine. UEH, for example, is the prompt to enter the vehicle type

action is

the test will automatically

identification number into the VTM. After the

continue. Prompting messages are listed in

2-13.

Numerical Readout. A numerical readout is the measured value in units of the measurement

being made. For example, if measuring O-45 volts DC, 12.7 is volts DC. If measuring O-25 PSIG pressure,

12.7 is

The units for each test are listed on the

cards. The numbers displayed on the VTM are

negative.

always positive unless there is a minus shown to make

2-13. Prompting Messages

Interpretation

VTM Readout

Signal to operator to enter vehicle type identification number

on the test

UEH

SELECT switches. Vehicle ID numbers are found under TEST DATA on the flip

cards, on the vehicle test cards, or GO1 of the appropriate GO Chain in this manual.

M977 series vehicle VID is 18.

Signal to operator to enter number of CYLinders or cylinder pairs on the TEST

CYL

SELECT switches. These numbers are found under TEST DATA on the flip cards.

Signal to operator to crank engine in compression balance or first peak tests.

power test.

Signal to operator to apply full throttle in a

Signal to operator to stop cranking in compression balance test or to release the

OFF

power test.

accelerator in the

Signal to the operator to release the TEST button during an offset test.

CAL

Numbers are used for prompting messages in several tests. They are as follows; in

confidence test 66, signals the operator to dial in 99. In

the operator to shut off fuel.

power test No. 12, the first numerical readout

2-280