TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 1261 of 1313
CONTROL PANEL LIGHTS WORK, SYSTEM FAILS TO INFLATE OR DEFLATE - Continued
STEP
7.
DOES CTIS SYSTEM OPERATE CORRECTLY AFTER THE ELECTRICAL LEAD IS PROPERLY
CONNECTED TO PRESSURE SWITCH ON WET TANK?
a.
Turn battery switch to OFF position.
b.
Refer to point to point schematics.
T0903DAA
WET
TANK
Figure 6.
Wet Tank.
c.
Remove electrical lead from pressure switch at wet tank.
d.
Clean the connectors, then reconnect the lead.
e.
Check CTIS operation.
CONDITION/INDICATION
DOES CTIS SYSTEM OPERATE CORRECTLY AFTER THE ELECTRICAL LEAD IS PROPERLY
CONNECTED TO PRESSURE SWITCH ON WET TANK?
DECISION
YES - Go to Step (11) to verify problem is solved.
NO - Go to Step (8).
STEP
8.
IS THERE CONTINUITY BETWEEN PRESSURE SWITCH AND CTIS WIRING HARNESS CANNON PLUG
AT ECU?
a.
Refer to point to point schematics.
b.
Turn battery switch to OFF position.
TM 9-2320-272-23-1
0149
0149-8
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