TM 5-3895-373-20 REFERENCE INFORMATION BATTERY/STARTER CIRCUIT BATTERY INTERNAL RESISTANCE - STE/ICE-R TEST 73 DESCRIPTION TEST PROCEDURES Evaluates    battery    condition    by    measuring    battery voltage and current simultaneously. 1. Set ENGINE CRANK switch on DCA housing to TEST. Shunt: 12258937-1 2. Make   sure   all   accessory   drive   functions   are   turned OFF. DCA Test Pins: X, Y, V, and W 3. Set TEST SELECT switches to 73. Measurement Range: 0 to 999.9 milliohms 4. Press   and   hold   TEST   button   until   CAL   appears   on display. PRE-TEST PROCEDURES Run confidence test per TM 9-4910-571-12&P. 5. Release   TEST   button   and   wait   for   offset   value   to appear on display.  If offset value is within -150 to +150 milliohms, proceed.  If not, refer to DCA troubleshooting POSSIBLE ERROR  MESSAGES in TM 9-4910-571-12&P. E002 Transducer not connected. 6. Press and release TEST button. E005 Offset not performed. 7. When   GO   appears   on   display,   engage   starter   for   2 seconds or until one of the following appears on the E008 VTM does not detect battery voltage. display: OFF E013 VTM cannot use data received. .9.9.9.9 E020 No first peak information was detected by the VTM. A valid resistance reading An error message E021 VTM  cannot  calculate  result  because  current is over current probe’s range. 8. Observe   displayed   value.      Displayed   values   are   in milliohms.  Expected value is 5 to 17 milliohms. NOTE: If  .9.9.9.9  is  displayed,  battery  internal  resistance  is  more  than  the  range  of  the  VTM  and  cannot  be measured.  If E013 is displayed, then check battery connections and correct as necessary.  Repeat test procedures.  If E013 persists after 3 tests, VTM cannot perform test. BATTERY RESISTANCE CHANGE - STE/CE-R TEST 75 DESCRIPTION TEST PROCEDURES Measures  the  rate  of  change  of  battery  resistance  as an indicator of battery condition. 1. Set ENGINE CRANK switch on DCA housing to TEST. Shunt: 12258937-1 2. Make   sure   all   accessory   drive   functions   are   turned OFF. DCA Test Pins: X, Y, V, and W 3. Set TEST SELECT switches to 75. Measurement Range: 0 to 999.9 milliohms per second 4. Press   and   hold   TEST   button   until   CAL   appears   on display. PRE-TEST  PROCEDURES Run confidence test per TM 9-4910-571-12&P. 5. Release   TEST   button   and   wait   for   offset   value   to appear on display.  If offset value is within - 150 to +150 milliohms  per  second,  proceed.    If  not,  refer  to  DCA troubleshooting in TM 9-4910-571-12&P. POSSIBLE  ERROR  MESSAGES 6. Press and release TEST button. E002 Transducer not connected. E005 Offset not performed. E008 VTM does not detect battery voltage. 7. When   GO   appears   on   display,   engage   starter   for   2 seconds or until one of the following appears on the E013 VTM cannot use data received. Display: OFF E020 No first peak information was detected by the VTM. .9.9.9.9 A valid resistance reading E021 VTM  cannot  calculate  result  because  current is over current probe’s range. An error message 8. Observe   displayed   value.      Displayed   values   are   in milliohms per second.  Expected maximum value is 25 milliohms per second. NOTE: If   .9.9.9.9   is   displayed,   battery   resistance   change   is   more   than   the   range   of   the   VTM   and   cannot   be measured.    If  E013  is  displayed,  then  check  battery  connections  and  correct  as  necessary.    Repeat  test procedures.  If E013 persists after 3 tests, VTM cannot perform test. 2-123