TM 5-3810-305-23
0020
MSD-ICE TESTS - Continued
15.
Operate engine between 1,000 to 1,200 rpm. Change TEST SELECT switches to read 01. Push TEST button.
VTM will display PASS. Change TEST SELECT switches to read 82. Push TEST button. Refer to test card for
alternator voltage test limits. If alternator voltage falls outside test limits, replace or repair alternator, refer to
Alternator and Mounting Assembly Bracket Maintenance (WP 0062).
16.
Engine must be within the normal temperature range. With engine at idle, change TEST SELECT switches to
read 12. Push TEST button. When VTM displays CIP, push accelerator pedal to floor and hold until VTM
displays power test percent full power value. Return engine to idle. Refer to test card for power test percent
full power test limits.
17.
Shut engine OFF. Turn fuel switch OFF. Change TEST SELECT switches to read 14. Push TEST button. When
VTM displays O, crank engine. Stop cranking engine when VTM displays OFF or E013. If the cranking is
incorrect, VTM will display E013. If E013 is displayed, batteries could be discharged, cranking speed could be
low, or cranking was interrupted during test. Correct problem and repeat test. After VTM displays OFF, it will
display either FAIL or the compression unbalance test value. If FAIL appears, the compression unbalance
value is too far unbalanced for VTM to measure. Refer to test card for compression unbalance test limits. If
compression unbalance test falls outside test limits, replace engine, refer to Engine Assembly Maintenance
18.
Change TEST SELECT switches to read 72. Push TEST button until VTM displays CAL, then release button.
Refer to test card for current first peak test offset limits. Push TEST button again. VTM will display GO. Crank
engine. When VTM displays OFF, stop cranking engine. VTM will display amperage value. Refer to test card
for current first peak test limits. If amperage falls outside test limits, service batteries, refer to Battery Assembly
and Cables Maintenance (WP 0076).
19.
Start engine. Check vehicle engine temperature gage. Refer to test card for engine temperature test limits. If
temperature falls outside test limits, replace thermostat, refer to Thermostat Maintenance (WP 0056). If
temperature is still outside test limits, replace water pump, refer to Water Pump Maintenance (WP 0058).
20.
Shut engine OFF. Turn fuel switch ON. Change TEST SELECT switches to read 01. Push TEST button. VTM
will display PASS. Operate engine between 1,000 to 1,200 rpm. Change TEST SELECT switches to read 84.
Push TEST button. Refer to test card for alternator negative cable voltage drop test limits. If voltage falls outside
test limits, clean and inspect battery and ground connections.
21.
Turn fuel switch OFF. Change TEST SELECT switches to read 80. Push TEST button until VTM displays CAL
then release button. Refer to TEST card for starter motor current average offset hits. Push TEST button again.
Crank engine. Stop cranking engine. VTM will display amperage value. Refer to test card for starter motor
current average test limits. If amperage falls outside test limits, clean and inspect battery, starter, and
ground connections.
22.
Change TEST SELECT switches to read 73. Push TEST button until VTM displays CAL, then release button.
Refer to TEST card for battery internal resistance offset limits. Push TEST button again. VTM will display GO.
Crank engine. When VTM displays OFF, stop cranking engine. VTM will display milliohm value. Refer to test
card for battery internal resistance test limits. If milliohms fall outside test limits, service batteries, refer to
Battery Assembly and Cables Maintenance (WP 0076).
23.
Change TEST SELECT switches to read 74. Push TEST button until VTM displays CAL, then release button.
Refer to TEST card for starter current resistance offset limits. Push TEST button again. VTM will display GO.
Crank engine. When VTM displays OFF, stop cranking engine. VTM will display milliohm value. Refer to test
card for starter current resistance test limits. If milliohms fall outside test limits, check starter connections. If
test limits are still exceeded, replace or repair starter, refer to Starter Motor Maintenance (WP 0063).
24.
Change TEST SELECT switches to read 75. Push TEST button until VTM displays CAL, then release button.
Refer to TEST card for battery resistance charge offset limits. Push TEST button again. VTM will display GO.
Crank engine. When VTM displays OFF, stop cranking engine. VTM will display milliohm value. Refer to test
card for battery resistance charge test limits. If milliohms fall outside test limits, service batteries, refer to Battery
Assembly and Cables Maintenance (WP 0076).
0020-5
03/15/2011Rel(1.8)root(tswp)wpno(T00025)
