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 261 of 1417
G01: VTM CONNECTION AND CHECKOUT (Part 1) - Continued
STEP
10.
Perform DCA transducer offset test.
a.
Engine must be off.
b.
Refer to table below.
Table
3.
Offset Test.
DCA OFFSET TEST
Test Number
24
Offset
45
Table
4.
Fuel Pressure Test.
TEST NO.
TEST
24
Fuel Supply Pressure
c.
Dial test number listed into TEST/SELECT switches.
d.
Press and hold TEST each time until message CAL appears on display.
T0006DAA
Figure 10.
Calibration Prompt Message.
e.
When CAL appears, release TEST.
f.
Compare results on VTM for vehicle being tested with specification listed for each DCA offset.
CONDITION/INDICATION
Is transducer offset below its limit?
DECISION
YES - Go to GO2: First Peak Test - Starter Current. (WP
0189)
NO - Refer to TM9-4910-571-12&P to troubleshoot DCA harness. Repeat offset test. If no fault is found, notify
supervisor.
END OF WORK PACKAGE
TM 9-2320-272-23-2
0188
0188-10
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