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TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download

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TM 9-2320-280-20-1 ENGINE RPM (Average) TEST #10 Description: This procedure measures engine speed in the range 50 to 5000 RPM. At speeds below 50 RPM the VTM will display 0. At speeds above 5000 RPM the display may give a false reading. Test requires DCA hookup only. Typical Applications: Check Engine Speed Pre-Test Procedures Run Confidence Test. Possible Error Messages E014 Incorrect # of cylinders entered Test Procedure: 1. Set TEST SELECT switches to 10 2. Press and release TEST button 3. Start engine 4. Observe displayed value (RPM). 2-734