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 263 of 1417
G02: FIRST PEAK TEST– STARTER CURRENT
STEP
1.
Condition current probe – do offset.
a.
Connect P1 of transducer cable W4 to J2 on VTM.
b.
Connect P2 of cable W4 to connector on the current probe.
c.
Clamp current probe around positive battery cable number 6 connected to starter.
d.
Point arrow on the probe toward starter.
NOTE
If engine does not crank, go to NG20: No Crank No Start (WP
0198).
e.
Crank engine for several cycles with fuel shut off.
f.
Turn off all vehicle electrical accessories.
g.
Dial 72 into TEST SELECT.
h.
Press and hold TEST until CAL message appears on display.
T0007DAA
Figure 1.
CAL Prompt Message.
i.
Release TEST.
j.
Wait for offset to appear.
CONDITION/INDICATION
Is offset value within limits of -225 to +225?
DECISION
YES - Go to Step (2).
NO - Proceed to TM 9-4910-571-12&P for offset fault isolation.
TM 9-2320-272-23-2
0189
0189-2
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