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 527 of 790

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

0022 00--44

APPARENT HDC SYSTEM PROBLEM -- Continued

0022 00

YES

NO

from block 76

NO

NO

79

Substitute a spare (good) pressure transducer

for the “CIRCUIT FAULT” pressure transducer

identified during the BIT and repeat the test.

78

Perform continuity test and check for short circuit

to cable (connector case/shell) for the two

pins/wires in the W4 cable that go from either

connector W4P2 or W4P3 (as applicable),

normally connected to the HDC control box, to the

W4P5 or W4P6 connector (as applicable)

normally connected to the umbilical disconnect

bracket.

Disconnect umbilical cable W4 connector W4P2 on

W4P3 (from HDC control box connector J2 or J3,

as applicable) associated with designated

“CIRCUIT FAULT” pressure transducer.

Does an open circuit or short circuit exist for the

umbilical cable assembly W4 wiring circuit

(”CIRCUIT FAULT” pressure transducer 15 VDC

referenced voltage circuit) being checked?

YES

NO

80

Replace HDC control box.

81

Replace the original “CIRCUIT

FAULT” pressure transducer

identified by the BIT (WP 0031 00,

WP 0032 00, WP 0035 00)

Are the results the same?

Resume the HDC system

functional check--out.

82

Replace umbilical cable assembly W4.

Resume the HDC system functional

check--out.