I understand you're looking for an English manual for the . However, "Carrozzeria" is Pioneer’s Japan-exclusive brand, and most of these units (including the AVIC-RZ501) were never officially released with an English manual—only Japanese.
: Accesses the main source and settings screen. Navigation (ナビ) : Opens the map and destination entry. pioneer carrozzeria avicrz501 english manual exclusive
Since the dedicated English manual is a unicorn, here is the exclusive workaround method used by JDM importers: "Carrozzeria" is Pioneer’s Japan-exclusive brand