DTC B2600: DRL Error: Notes
CAUTION:
Body Function Controller (BFC) Pink 24-pin connector C3 contains power and ground sources. When removing BFC, always disconnect connector C3 first before disconnecting connectors C1 and C2. When installing BFC, always reconnect connectors C1 and C2, then connector C3 last.
NOTE:
All other Daytime Running Lights (DRL) DTCs must be diagnosed before DTC B2600. See BFC DTC DEFINITIONS
table under SELF-DIAGNOSTIC SYSTEM.