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 495 of 790

TM 5--2350--378--24&P

0022 00--12

APPARENT HDC SYSTEM PROBLEM -- Continued

0022 00

YES

YES

from block 15

18

Does a short circuit exist in umbilical cable W4

a

tW4P1-

-AorW4P4-

-A?

Check cable W4P1--A and W4P4--A pins for

short circuit to cable W4 connector pin B or to

W4 connector shell.

YES

19

Replace umbilical cable W4.

NO

NO

17

Replace umbilical cable W4.

NO

NO

16

Does continuity exist between umbilical cable

connector W4P1--A and connector W4P4--A,

and between W4P1--B and W4P4--B?

Perform continuity check between umbilical

cable connector W4P1--A, and connector

W4P4--A, and between W4P1--B and W4P4--B.

20

Reconnect umbilical cable W4, tighten all HDC

system connectors securely, and check vehicle

28 VDC power circuits.

Power off HDC system.