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 338 of 644
APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued
STEP
35.
Check for an open or short circuit in cable assembly W4.
a.
Disconnect umbilical cable W4 connector W4P2 or W4P3 (Figures 26, 27, and 28) (from HDC control
box connector J2 or J3, as applicable) associated with designated "CIRCUIT FAULT" solenoid valve.
CONTROL BOX
CONNECTOR J3
UMBILICAL CABLE
CONNECTOR W4P1
UMBILICAL CABLE
CONNECTOR W4P2
HDC
CONTROL BOX
T01926HDC
CONTROL BOX
CONNECTOR J1
UMBILICAL CABLE
CONNECTOR W4P3
CONTROL BOX
CONNECTOR J2
Figure 26.
Umbilical Cable Assembly W4P2 and W4P3 Connections to Hydraulic Diagnostic Center (HDC) Control
Box.
b.
Perform continuity test and check for short circuit to cable (connector case/shell) for two pins/wires in
W4 cable that go from connector W4P2 or W4P3 (as applicable) normally connected to HDC control box,
to W4P5 or W4P6 connector (as applicable) normally connected to umbilical disconnect bracket.
TM 5-2350-378-23&P
0021
0021-26
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