APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued
Check for continuity across umbilical cables.
Power off HDC system.
Perform continuity check between umbilical cable connector W4P1-A, and connector W4P4-A, and
between W4P1-B and W4P4-B (Figure 11).
Figure 11. Pin Layout for Connectors W4P1 and W4P4.
Does continuity exist between umbilical cable connector W4P1-A and connector W4P4-A, and between
W4P1-B and W4P4-B?
YES - Go to Step (11).
NO - Replace umbilical cable W4.