TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 310 of 1417
NG80: STARTER CIRCUIT TESTS - Continued
STEP
7.
Perform starter current test.
a.
Dial 90 into TEST SELECT and press TEST.
Table
3.
Starter Circuit Tests.
Test NO.
Test
89
0-45 VOLTS DC
90
0–1,500 AMPS DC
b.
Crank engine for a few seconds with fuel off.
CONDITION/INDICATION
Is starter current above 100 AMPS?
DECISION
YES - Go to Step (8).
NO - Go to NG81: Battery Tests (WP
0203).
STEP
8.
Perform repairs.
a.
Error message E013, displayed in Step (3), indicates short circuit, frozen starter, or tight engine.
b.
Check wiring to starter for short circuits. Repair as necessary.
CONDITION/INDICATION
Were repairs made?
DECISION
YES - Rerun GO-Chain tests to verify problem is solved and no other problem exists.
NO - Go to NG130: Engine Tightness Test (WP
0205).
TM 9-2320-272-23-2
0202
0202-5
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