Description & Operation

WARNING: This page is about a different car, the 2002 Ford RV Cutaway, 2002 Ford Econoline, 2002 Ford E450 Super Duty, and 2002 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This article includes Cutaway and RV Cutaway.

NOTE: Diesel vehicles are identified by "F" as eighth VIN character. Natural gas vehicles are identified by "M" as eighth VIN character. Gasoline vehicles are identified by various other eighth VIN characters.

Vehicle has 2 module communications networks. The module communications network provides the ability for module-to-module communication by sharing inputs and outputs instead of each component having an input and output wired directly to each module. A Standard Corporate Protocol (SCP) network or SCP bus, consists of a pair of twisted wires used to transfer information between each module. The SCP bus consists of plus (+) circuit No. 914 and minus (-) circuit No. 915. The SCP bus is routed throughout the vehicle to the Powertrain Control Module (PCM) and, if equipped, the Auxiliary PCM (APCM) on vehicles with diesel engines, or the Natural Gas Vehicle (NGV) module on natural gas vehicles.

The air bag diagnostic monitor, also referred to as the Electronic Crash Sensor (ECS), and the 4-Wheel Anti-Lock Brake System (4WABS) control module do not use the SCP bus to communicate with other modules. The ECS module and 4WABS control module are connected to the International Standards Organization (ISO) 9141 diagnostic communications network through a single wire (circuit No. 70). Both networks are connected to the Data Link Connector (DLC). This article is used to diagnose SCP bus and ISO 9141 communications network circuit faults. For module locations, see COMPONENT LOCATIONS .