APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued
Is HDC control box and umbilical cable W4 installed properly with all cable connectors tight? Is HDC system
ground connection in vehicle clean and secure?
YES - Go to Step (3).
NO - Install HDC control box and umbilical cable W4 properly, and tighten all cable W4 connectors and HDC
system ground connection in vehicle. Go to Step (3).
Check for indication that power is applied to HDC control box (Figure 4, Item 1).
Does red POWER ON led on HDC control box illuminate indicating power is applied to control box, when POWER
ON button is pressed?
Figure 4. Hydraulic Diagnostic Center (HDC) Control Box Front Panel.
YES - Go to Step (4).
NO - Go to Step (7).