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). For the 2004 model year the following vehicles will utilize the High Speed -CAN (HS-CAN) protocol for PCM communication:

• 2.3L Focus PZEV (partial zero emission vehicle)
• LS6
• LS8
• Taurus/Sable
• Thunderbird
• Explorer/Mountaineer
• 4.6L 2V and 5.4L 3V F150 (Non-Heritage)

The LS and Thunderbird will use HS-CAN between the DCL (Data Communication Link) 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 other CAN vehicles will use HS-CAN for PCM to network module communication and for scan tool diagnostics.

All other vehicles for model year 2004 will continue to use SCP as its communication media for the PCM. For more information about the entire communication network refer to the appropriate MODULE COMMUNICATION NETWORK .