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 1212 of 1313
FOUR PRESSURE MODE LIGHTS FLASHING - Continued
STEP
9.
IS THE PNEUMATIC CONTROLLER IN GOOD CONDITION?
Listen for clicking noise while changing CTIS mode.
T0420DAA
PNEUMATIC
CONTROLLER
(CAB)
Figure 9.
Pneumatic Controller.
CONDITION/INDICATION
IS THE PNEUMATIC CONTROLLER IN GOOD CONDITION?
DECISION
YES - Replace electronic control unit (Volume 5, WP
0813). Go to Step (10) to verify problem is solved.
NO - Replace pneumatic controller (Volume 5, WP
0810). Go to Step (10) to verify problem is solved.
STEP
10.
IS YOUR ORIGINAL PROBLEM STILL PRESENT?
a.
Ensure vehicle is returned to normal operating condition.
b.
Check to see if your original problem still exists.
CONDITION/INDICATION
IS YOUR ORIGINAL PROBLEM STILL PRESENT?
DECISION
YES - Notify supervisor.
NO - Problem fixed.
END OF WORK PACKAGE
TM 9-2320-272-23-1
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