APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued
Check if HDC system powers up after normal startup delay and performs start up BIT (Built-In-Test).
Does HDC system appear to power up after normal start-up delay and perform start-up BIT (Built-In-Test)?
YES - Go to Step (5).
NO - Go to Step (6).
Check if HDC displays pass message after BIT.
Does HDC system perform a start-up BIT (Built-In-Test) and display a PASS message on HDC control box LCD
YES - Go to Step (20).
NO - Go to Step (23).
Power off HDC system. Wait a few moments, then power up HDC system again.
Does same problem still exist?
YES - Replace HDC control box.
NO - Continue with HDC system functional check out (WP 0025).