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 240 of 1417
ABS - NO DATA (BLANK SCREEN ON HALDEX INFO-CENTER) - Continued
CONDITION/INDICATION
IS BATTERY VOLTAGE PRESENT AT ABS ECU?
DECISION
YES - Notify supervisor. It is possible another troubleshooting work package applies.
NO - Go to Step (4).
STEP
4.
IS BATTERY VOLTAGE PRESENT AT BOTH SIDES OF 3 AMP AND 15 AMP FUSES?
a.
Turn battery switch ON.
b.
Turn start switch to RUN position.
c.
Connect multimeter red lead to 3 amp fuse connector terminal. Refer to point to point schematics.
d.
Connect multimeter black lead to a known good ground.
e.
Meter reading should be between 21 and 24 VDC. Note reading.
f.
Connect multimeter red lead to 3 amp fuse connector other terminal.
g.
Connect multimeter black lead to a known good ground.
h.
Meter reading should be between 21 and 24 VDC. Note reading.
i.
Connect multimeter red lead to 15 amp fuse connector terminal.
j.
Connect multimeter black lead to a known good ground.
k.
Meter reading should be between 21 and 24 VDC. Note reading.
l.
Connect multimeter red lead to 15 amp fuse connector other terminal.
m.
Connect multimeter black lead to a known good ground.
n.
Meter reading should be between 21 and 24 VDC. Note reading.
o.
Turn start switch to OFF position.
p.
Turn battery switch OFF.
CONDITION/INDICATION
IS BATTERY VOLTAGE PRESENT AT BOTH SIDES OF 3 AMP AND 15 AMP FUSES?
DECISION
NO - No voltage at 3 amp fuse (both sides). Go to Step (5).
NO - No voltage at one side of 3 amp fuse. Replace 3 amp fuse (Volume 3, WP
0463). Go to Step (7) to verify
problem is solved.
NO - No voltage at 15 amp fuse (both sides). Go to Step (6).
NO - No voltage at one side of 15 amp fuse. Replace 15 amp fuse (Volume 3, WP
0464). Go to Step (7) to verify
problem is solved.
YES - Replace ABS wiring harness (Volume 3, WP
0467). Go to Step (7) to verify problem is solved.
TM 9-2320-272-23-2
0185
0185-3
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