TM-9-2320-260-20

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

APRIL 1995
TM-9-2320-260-20

  TM-9-2320-260-20 - Page 283 of 1337

TM 9-2320-260-20
2-21. VEHICLE TESTING (Contd)
c. Control Tests.
These tests are used to change (or control) the way a vehicle test is displayed, or the
way it is run. There are four (4) control tests:
01 Interleave (displays RPM with next test).
02 Display minimum value for next test.
03 Display maximum value for next test.
04 Display peak-to-peak value for next test.
Control tests 01, 02, 03, and 04 specify the action to be taken by the next test only.
A subsequent test will reset the control.
(1) Interleave (Test 01).
This test alternately measures engine speed and a second parameter such
as fuel pressure or alternator voltage. To initiate interleave, dial 01 into TEST SELECT switches and press
and release TEST button. The prompting message PASS will signal the technician to dial in second test
number and again press and release TEST button.
(2) Minimum Value (Test 02).
This test displays minimum value measured during a test. To
initiate a minimum value display, dial 02 into TEST SELECT switches and press and release TEST button.
The prompting message PASS will signal technician to dial in desired test number and again press and
release TEST button. The minimum value is displayed and updated whenever a lower minimum value is
measured. Entering 02 and test number again will reset process and a new minimum value will be
displayed.
(3) Maximum Value (Test 03).
This test displays maximum value measured during a test. To
initiate a maximum value display, dial 03 into TEST SELECT switches and press and release TEST button.
The prompting message PASS will signal technician to dial in desired test number and again press and
release TEST button. The maximum value is displayed and updated whenever a higher maximum value
is measured. Entering 03 and test number again will reset process and a new maximum value will be
displayed.
(4) Peak-to-Peak Value (Test 04).
This test displays peak-to-peak value of dwell (test 16),
alternator/generator output volts (test 82), 45-volts DC (test 89), 1500 amps DC (test 90), and battery volts
(test 67). Electrical peak-to-peak is for measuring dwell variation. To start a peak-to-peak measurement,
dial 04 into TEST SELECT switches and press TEST button. The prompting message PASS will signal
operator to dial in one of five test numbers (16, 82, 89, 90, 67) and again press TEST button.
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