TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0016 00 0016 00-6 SIMPLIFIED TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINE—REPROGRAMMABLE (STE/ICE-R) TROUBLESHOOTING INTRODUCTION (Contd) Readout Display During testing, the Readout Display will show different types of messages to inform the user of the status and results of the test being performed. The messages can be up to four characters long. Described below are the different types of messages that the VTM will display. STATUS READOUT: A status readout keeps the technician informed of what is happening. For example, .8.8.8.8 is displayed each time the power switch is pushed on. It means that power is applied, and that all elements of the display are operative. It changes to four dashes 1.5 seconds later, indicating that the VTM is ready to be used for testing. The status readout displays are described in table 1. PROMPTING MESSAGE: A prompting message is a technician action message. It is a signal for the operator to do something, such as crank the engine. For example, UEH tells the operator to enter the vehicle identification number into the VTM. After technical action is performed, the test will automatically continue. Prompting messages are listed in table 2. NUMERICAL READOUT: A numerical readout is the measured value in units of measurement being made. For example, if 0 to 45 volts DC are being measured and the display shows 12.7, then there are 12.7 VDC present. Units for each test are listed on the test cards. ERROR READOUT: There are 26 different error readouts. All error readouts start with an E. E001 is a typical error readout. An error readout is a warning that the technician omitted a necessary step or otherwise made an error, such as forgot to connect the transducer, selected a wrong test number, failed to start the engine, etc. All error messages must be corrected prior to continuing the test procedures. Error messages are described in table 3. If an error message does not disappear after corrective action, refer to TM 9-4910-571-12&P. CONFIDENCE ERROR READOUTS: Confidence test messages are displayed either as PASS or as a C followed by three numbers. A confidence error is an error message used by VTM repair personnel as an aid in troubleshooting. If a confidence error message appears, refer to TM 9-4910-571-12&P for troubleshooting procedures.