Figure 2
The diagram centers on a large rectangle labeled “Traction Control System”, containing stacked rounded rectangles for “A D Signal”, “Digital Signal Collect”, and “I C U”, and a smaller inner box labeled “Diagnostic Device”, which includes two rectangles for “R A M” and “F L A S H” connected by a rightward arrow marked “Trig”. Arrows flow from the topmost external rectangle, “External Sensors”, downward to “A D Signal” and from the leftmost “Contactor Status” rightward to “Digital Signal Collect”, which then points into “R A M”. “A D Signal” branches into two arrows pointing to “R A M” with L V D S and to “I C U” positioned rightmost, which sends a pulse control signal with L V D S to “R A M” into “Diagnostic Device”.Metro fault diagnosis device architecture. Source: Authors’ own work