Test D: Scan Tool Does Not Communicate With Class 2 Device: Notes
WARNING: This page is about a different car, the 2001 GMC Safari and 2001 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
BCM Brown 24-pin connector C1 contains power and ground sources. When removing BCM, always turn ignition switch to OFF position. Always disconnect connector C1 first before disconnecting connectors C2 (Light Blue) and C3 (Purple). When installing BCM, always reconnect connectors C2 and C3, then connector C1 last.