Normal Operation

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The instrument cluster communicates interactively with other electronic modules using the controller area network (CAN). High speed CAN communication is through an unshielded, twisted pair cable data bus line, circuits 1908 (WH) and 1909 (BK). Medium speed CAN communication is through an unshielded, twisted pair cable data bus line, circuits 1847 (WH/OG) and 1848 (PK/OG). With the ignition switch in the START or RUN position, the instrument cluster receives voltage from the smart junction box (SJB) through circuit 3049 (BK/LG). When the ignition switch is in the RUN or ACC position, voltage is received from the SJB through circuit 1002 (BK/PK). With the ignition switch in the OFF position, the instrument cluster receives its keep-alive memory voltage from the SJB through circuit 956 (OG/LG). The instrument cluster grounding is through circuit 570 (BK/WH) and the indicators are grounded through circuit 57 (BK).