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 65 of 1417
TROUBLESHOOTING ABS WITHOUT DIAGNOSTIC TOOLS - Continued
STEP
1.
ARE BOTH WHEEL SPEED SENSOR LEADS OK?
Check both left and right wheel speed sensor leads for damage, corrosion, and soundness. Refer to point
to point schematics.
T0859DAA
SENSOR LEAD
SENSOR LEAD
WHEEL SPEED SENSOR
LEAD CONNECTORS
Figure 1.
Wheel Speed Sensor Leads.
CONDITION/INDICATION
ARE BOTH WHEEL SPEED SENSOR LEADS OK?
DECISION
NO - Replace damaged wheel speed sensor (Volume 3, WP
0468). Go to Step (15) to verify problem is solved.
YES - Go to Step (2).
STEP
2.
ARE BOTH FRONT AND REAR ABS SOLENOID VALVE CONNECTIONS OK?
Check both the front and rear solenoid valve connections for corrosion, damage, and sound connection.
Refer to point to point schematics.
TM 9-2320-272-23-2
0156
0156-2
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