TM-5-2350-378-24-P
HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
TM-5-2350-378-24-P - Page 491 of 790
TM 5--2350--378--24&P
0022 00--8
APPARENT HDC SYSTEM PROBLEM -- Continued
0022 00
11
Is vehicle transmission in neutral with parking
brake fully engaged (parking brake light in vehicle
is illuminated?
YES
NO
from block 4
12
Is 28 VDC present between umbilical cable
connector W4P1 pins A and B?
Disconnect umbilical cable connector W4P1
from HDC control box connector J1.
NO
NO
13
Continue with HDC system functional
check--out.
Place vehicle transmission in neutral and fully
engage parking brake (parking brake light in
vehicle should illuminate).
NO
NO
YES
To block 15
14
Replace HDC control box.
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