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TM-9-2320-361-24-1 Page 284

TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks

Page 284 of 1176


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TM 9-2320-361-24-1 0017 00 0017 00-2 SIMPLIFIED TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINE—REPROGRAMMABLE (STE/ICE-R) GO CHAIN TROUBLESHOOTING (Contd) GO TEST NUMBER TEST TITLE WORK PACKAGE-PAGE NUMBER GO1 VTM connections and checkout 0017 00-3 GO2 First peak test 0017 00-8 GO3 Pulse tachometer installation 0017 00-10 GO4 Engine start-lubrication check 0017 00-11 GO5 Charging circuit and battery voltage test 0017 00-14 GO6 Engine warm up/coolant check 0017 00-16 GO7 Governor check/power test 0017 00-18 GO8 Idle speed/governor check 0017 00-20 GO9 Compression unbalance test 0017 00-21 TEST DESCRIPTIONS (Contd) Control Test 3 Maximum Value, (Test 03), displays maximum value measured during a test.To initiate a maximum value display, dial 03 into TEST SELECT switches and press and release TEST button. The prompting message PASS will signal the technician to dial in the desired test number and again press and release TEST button. The maximum value is displayed and updated whenever a higher maximum value is measured. Entering 03 and test number again will reset process and new maximum value will be displayed. Control Test 4 Peak-to-Peak Value, (Test 04), displays peak-to-peak value of dwell (test 16), alternator output volts (test 82), 45-volts DC (test 89), 1500 amps DC (test 90), and battery volts (test 67). Electrical peak-to- peak is for measuring dwell variation. To start peak-to-peak measurement, dial 04 into TEST SELECT switches and press TEST button. The prompting message PASS will signal the operator to dial in one of five test numbers (16, 82, 89, 90, 67) and again press TEST button. Control Test 5 Test 05 differs from the previous four control tests in several ways. First, it must be preceded by a number-of-cylinders entry (test 58) or Vehicle Identification Number (VID) entry (test 60). After the number of cylinders or VID has been entered, and engine is warm and idling, 05 is dialed into the TEST SELECT switches, and the TEST button is pressed. The prompting message SIP will signal the operator to press accelerator to the floor. The VTM will monitor engine speed during acceleration, and at approximately 3500 RPM, the VTM will begin full power simulation. Simulation will continue until the operator releases accelerator. PASS message is displayed when simulation starts. A measurement can now be made during power simulation by dialing desired test number and pressing TEST button. New test and control functions can be selected until accelerator is released. The 05 control feature provides a more accurate indication of engine performance than does testing under unloaded conditions. GO CHAIN FLOWCHARTS NOTE Test GO1, VTM connections and checkout, must be performed before running any other STE/ICE-R test. The next section of this Work Package (WP) contains Go Chain flowcharts, which will assist the technician in diagnosing problems with STE/ICE-R. Table 1, lists the Go Chain along with the page the flowchart can be found. Table 1. Go Chain Index, TK Mode.