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 148 of 1417
ABS - CODE SLW 42 (LEFT SIDE - BLUE CHANNEL) - Continued
STEP
3.
IS MODULATOR VALVE FAULTY?
Check modulator valve at front relay valve for proper operation by cycling battery and start switches ON
and OFF while listening for modulator valve to cycle. Refer to point to point schematics.
T0846DAA
FRONT
SOLENOIDS
MODULATOR
VALVE
Figure 2.
Front Modulator Valve.
CONDITION/INDICATION
IS MODULATOR VALVE FAULTY?
DECISION
YES - Replace front relay valve (Volume 3, WP
0458). Go to Step (6) to verify problem is solved.
YES - Go to Step (4).
TM 9-2320-272-23-2
0168
0168-3
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