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 127 of 1417
ABS - CODE S2A 13 (LEFT SIDE - BLUE CHANNEL)
STEP
1.
IS LEFT WHEEL SPEED SENSOR OUTPUT VOLTAGE OK?
a.
Ensure battery and start switches are in the OFF position.
b.
Cage left rear-rear wheel brakes.
c.
Raise left rear-rear wheels until they are off the ground M939 (Volume 3, WP
0484),
M939A1/A2 (Volume 3, WP
0485). Support vehicle with jack stand.
T0943DAA
Figure 1.
Wheel Speed Sensor Connector.
d.
Disconnect the left rear-rear wheel speed sensor.
e.
Set multimeter to measure VAC.
NOTE
Battery does not need to be connected to perform this test. ABS wheel speed sensors
generate a voltage signal when sensored wheels are in motion.
TM 9-2320-272-23-2
0164
0164-2
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