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Multiplexing Implementation

Currently Ford Motor Company uses two different types of communication language protocols to communicate with the Powertrain Control Module (PCM). These protocols are Standard Corporate Protocol (SCP) and Controller Area Network (CAN). Starting with the 2003 model year, Ford will phase-in High Speed-CAN (HS-CAN) for PCM communication with the following vehicles:

The LS and Thunderbird will use HS-CAN between the Data Communication Link (DCL) connector and the PCM for scan tool to PCM diagnostics only. Inter communication (PCM to other network modules) for the LS and Thunderbird will continue to use SCP. The Focus 2.3L PZEV will use HS-CAN for PCM and instrument cluster (IC) module communication and for scan tool diagnostics.

All other vehicles for model year 2003 will continue to use SCP as its communication media for the PCM.

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