TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 1196 of 1275
TM9-2350-311-20-1 - Set TEST SELECT switches to 01, press and release TEST button. - When Con appears, set TEST SELECT switches to 67 and release TEST button. VTM will alternately display battery voltage and rpm. SET ENGINE RPM. . 1 - Adjust engine speed to 1000 to 1200 rpm. - Turn vehicle headlights and accessories on to load charging system. If VTM does not display engine speed, refer to MEASURE BATTERY VOLTAGE . pulse tachometer fault isolation procedure in TM 9-4910-571-12&P. 2 Watch display and verify that battery voltage is within 27.5 to 28.5 Vdc. I Is battery voltage within limits? After completing repair, rerun GO CHAIN tests to verify problem has been fixed and that no other problems exist. Start at GO 2 (Figure 2, sheet 8) if VTM is already connected. Otherwise start at GO 1 (Figure 2, sheet 1). I See Chapter 3 for further electrical troubleshooting. I Is battery voltage within limits? I Go to Figure 2, sheet 14. - Turn off headlights and accessories. - Turn vehicle engine off. Figure 2, Sheet 13 of 20 I-19 NOTE NOTE