Overview
Multiplexing is a method of sending 2 or more signals simultaneously over a single circuit. Multiplexing is used to allow 2 or more electronic modules (nodes) to communicate simultaneously over a twisted-wire pair [data (+) and data (-)] network. The information or messages that can be communicated on these wires consists of commands, status or data. The advantage of using multiplexing is to reduce the weight of the vehicle by reducing the number of redundant components and electrical wiring.
Note. The Infotainment Controller Area Network (I-CAN) goes to the DLC, but the Infotainment Controller Area Network (I-CAN) modules communicate with the scan tool over the Medium Speed Controller Area Network (MS-CAN). The IPC is used as a gateway module for the messages to transfer between the scan tool and the modules on the Infotainment Controller Area Network (I-CAN).
The vehicle has 3 module communication networks which are connected to the Data Link Connector (DLC), and are located under the instrument panel
- High Speed Controller Area Network (HS-CAN)
- Medium Speed Controller Area Network (MS-CAN)
- Infotainment Controller Area Network (I-CAN)
Normal CAN Operation
The data (+) and data (-) circuits are each regulated to approximately 2.5 volts during neutral or rested network traffic. As messages are sent on the data (+) circuit, voltage is increased by approximately 1.0 volt. Inversely, the data (-) circuit is reduced by approximately 1.0 volt when a message is sent.
Successful communication of a message can usually be identified by the slight spike at the end of a message transmission. Any signals that are significantly different than the normal CAN waveform may cause network DTCs (U-codes) to set or may cause a complete network outage.
Diagnostic Overview
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS , Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS , Electronic Engine Controls - 1.6L for additional information.
Refer to SYSTEM WIRING DIAGRAMS , Electronic Engine Controls - 2.0L for additional information.
Refer to SYSTEM WIRING DIAGRAMS , Electronic Engine Controls - 2.5L for additional information.
Normal Operation and Fault Conditions
The PCM communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). An IDS session cannot be established if the PCM communication fails when attempting to identify the vehicle.
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Vehicle Dynamic Systems for additional information.
The ABS module communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Grounds for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Distribution/BCM for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
The Body Control Module (BCM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN) and communicates with the other modules through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Instrument Cluster for additional information.
The Instrument Panel Cluster (IPC) communicates with the scan tool and other network modules on the Medium Speed Controller Area Network (MS-CAN) and communicates with other network modules through the Infotainment Controller Area Network (I-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Steering Controls for additional information.
The Power Steering Control Module (PSCM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Supplemental Restraint System for additional information.
The Restraints Control Module (RCM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Supplemental Restraint System for additional information.
The Occupant Classification System Module (OCSM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Cruise Control for additional information.
The Steering Angle Sensor Module (SASM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Parking Aid for additional information.
The Parking Aid Module (PAM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Remote Keyless Entry and Alarm for additional information.
The Remote Function Actuator (RFA) module communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Audio System/Navigation for additional information.
The Accessory Protocol Interface Module (APIM) communicates with the scan tool and other network modules on the High Speed Controller Area Network (HS-CAN) and Infotainment Controller Area Network (I-CAN) (4.2-inch screen). The APIM also communicates with other network modules on the Medium Speed Controller Area Network (MS-CAN) (8-inch touchscreen).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Audio System/Navigation for additional information.
The Audio Front Control Module (ACM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). The IPC is used as a gateway module.
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Audio System/Navigation for additional information.
The Front Controls Interface Module (FCIM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). The IPC is used as a gateway module.
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Audio System/Navigation for additional information.
The Front Control/Display Interface Module (FCDIM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). The IPC is used as a gateway module.
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Audio System/Navigation for additional information.
The Global Positioning System Module (GPSM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Vehicle Emergency Messaging System for additional information.
The Side Obstacle Detection Control Module - Left (SOD-L) and Side Obstacle Detection Control Module - Right (SOD-R) communicate with the scan tool through an extended Medium Speed Controller Area Network (MS-CAN) to the BCM. The BCM translates the messages to the scan tool.
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Memory Seats for additional information.
The Driver Seat Module (DSM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Manual Climate Control System for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Automatic Climate Control System for additional information.
The HVAC module communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Audio System/Navigation for additional information.
The audio Digital Signal Processing (DSP) module communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). The IPC is used as a gateway module.
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Cornering Lamps for additional information.
The Headlamp Control Module (HCM) communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Heated Window for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Windows for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Door Locks for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Mirrors for additional information.
The Driver Door Module (DDM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Heated Window for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Windows for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Door Locks for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Mirrors for additional information.
The Passenger Door Module (PDM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Power Liftgate for additional information.
The Liftgate/Trunk Module (LTM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Parking Aid for additional information.
The IPM-B communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to SYSTEM WIRING DIAGRAMS - Trailer/Camper Adapter for additional information.
The TRM communicates with the scan tool through the High Speed Controller Area Network (HS-CAN).
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to COMMUNICATIONS NETWORK .
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to COMMUNICATIONS NETWORK .
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
Refer to COMMUNICATIONS NETWORK .
Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.
Refer to SYSTEM WIRING DIAGRAMS - Module Communications Network for additional information.
The scan tool is connected to the Data Link Connector (DLC) to communicate with modules on the High Speed Controller Area Network (HS-CAN), Medium Speed Controller Area Network (MS-CAN) and Infotainment Controller Area Network (I-CAN).