TM-5-2350-378-23-P

ARMORED COMBAT EARTHMOVER (ACE), M9; HYDRAULIC DIAGNOSTIC CENTER

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JUNE 2012

TM-5-2350-378-23-P - Page 342 of 644

APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued

c.

Disconnect umbilical cable connector W4P5 or W4P6 (as applicable) associated with "CIRCUIT FAULT"

pressure transducer from cable assembly W2J1 or cable assembly W3J1 (as applicable) connector on

umbilical disconnect bracket (Figures 30 and 31).

T01930HDC

PLUG

SOCKET

Figure 30.

Pin Locations for W2J1 and W3J1 Connectors.

PLUG

T01931HDC

Figure 31.

Upper Cable Assembly W2 and Lower Cable Assembly W3 Electrical Connections.

d.

Perform continuity test and check for short circuit to cable ground (connector case/shell) for two pins/

wires in embedded cables assembly (W2J1 or W3J1, as applicable) that route 15 VDC reference voltage

from HDC control box to pressure transducer associated with "CIRCUIT FAULT" message. (15 VDC

reference voltage is applied between pins 1 and 2 on 5-pin hydraulic pressure transducer electrical

connector J1 on all pressure transducers. The DC voltage representing hydraulic pressure measured by

pressure transducer is returned to HDC control box between pins 4 and 5 on transducer electrical

connector J1).

Refer to FP-19 Hydraulic Pressure Transducer Electrical Wiring Diagram.

TM 5-2350-378-23&P

0021

0021-30