TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 Description: CURRENT FlRST PEAK TEST #72 This procedure measures the overall condition of the complete starting system. Test requires DCA hookup only. Typical Applications: Check conditon of starting system on C1 engines with VTM trdngpowered from battery of vehicle tested. Test Procedure: 1. 2. 3. 4. 5. 6. 7. 8. Pre-Test Procedures: Run Confidence Test. Warm up engine to operating temperature. Turn off ail electrical accessories. Possible Error Messages: E002 Transducer not connected. E005 Offset not performed. E008 VTM does not detect battery voltage. E013 VTM cannot use data received. E020 No first peak information was detected by the VTM. E021 VTM cannot calculate result because current is over current probe’s range. DiscABonnect fuel solenoid wire 54A to prevent NOTES: starting. Make sure all vehicle accessories are off. Set TEST SELECT switches to 72. If .9.9.9.9 is displayed, current first peak was too high and cannot be measured with VTM. Press and hold TEST button until CAL appears on display. If E013 is displayed, then check battery Release TEST button and wait for offset value connections and correct as necessary. Repeat to appear on display. If offset is within the range Step 6. If E013 persists after 3 tests, VTM -150 to 150, proceed. If not, go to DCA cannot perform test. Troubteshooting Procedure. Press and release TEST button. When GO appears on display, crank engine for 2 seconds or until one of the following appears on the display OFF .9.9.9.9 A number An error measage Observe displayed value (amps). 2-745