TM 5-2350-378-23&P
0021
APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued
STEP
11.
Check cable W4P1-A and W4P4-A pins for short circuit to cable W4 connector pin B or to W4 connector shell
(Figures 12 and 13).
HDC
CONTROL BOX
CONTROL BOX
CONNECTOR J3
CONTROL BOX
CONNECTOR J1
CONTROL BOX
CONNECTOR J2
UMBILICAL CABLE
CONNECTOR W4P1
UMBILICAL CABLE
CONNECTOR W4P2
UMBILICAL CABLE
T01912HDC
CONNECTOR W4P3
Figure 12.
Umbilical Cable Assembly W4 Connections to Hydraulic Diagnostic Center (HDC) Control Box.
W3J1
W2J1
W4P6
W1J1
UMBILICAL CABLE
DISCONNECT
PANEL
W4P4
UMBILICAL CABLE
W4P5
ASSEMBLY W4
T01913HDC
Figure 13. Umbilical Cable Assembly W4 Connection to Umbilical Cable Disconnect Bracket.
CONDITION/INDICATION
Does a short circuit exist in umbilical cable W4 at W4P1-A or W4P4-A?
DECISION
YES - Replace umbilical cable W4.
NO - Reconnect umbilical cable W4, tighten all HDC system connectors securely, and check vehicle 28 VDC
power circuits.
03/15/2011Rel(1.8)root(tswp)wpno(T00019)
