INTRODUCTION STE/ICER (SIMPLIFIED TEST EQUIPMENT FOR INTERNAL
COMBUSTION ENGINES-REPROGRAMMABLE) PROCEDURESContinued
Error in entry of power test constants.
Status messages keep the operator informed of what is happening.
There is power to the VTM, and the display is working properly. This appears only
for a short period after power is turned on.
VTM is reading a test value beyond its range.
Unit under test has passed test, or VTM has accepted a control function entry.
Unit under test has failed test.
Accepted control function input.
Numerical display is an average value.
Engine speed below 1600 rpm during SI power test indicates the engine failed the
VTM is busy.
Units of measurement (psi, rpm, Volts, etc.) are not displayed. Numerical readouts indicate the measured value in units of the
measurement being made. For example, if you are measuring 045 volts dc, 12.7 is volts dc. If you are measuring 025 psig
pressure, 12.7 is psig. The units for each test are listed on the flip cards. Also, the readout will alternate between displaying
values and displaying vehicle identification data (VID).
Prompting messages tell the operator to do something. After the operator action is completed, testing will continue. Some of
the prompting messages and their meanings are as follows:
Tells the operator to enter VID on the TEST SELECT switches.
Tells the operator to enter the number-of-cylinders into the VTM.
Tells the operator to crank engine.
Tells the operator to set TEST SELECT switches to 99 during confidence test.
Tells the operator to release the TEST button during an offset test.
Tells the operator to apply full throttle in a CI power test.
Confidence Test Error Messages
Confidence test messages are displayed either as PASS or by a C followed by three numbers (#). A C### is an error message
used by VTM repair personnel as an aid in troubleshooting.
If a C### message appears during confidence test or during normal operation, go to confidence test fault isolation, TM
9-4910-571-12&P, for the necessary corrective action.