Module Communications Network System: Other Ford Freestyle I

Audio Unit

The audio unit uses the medium speed CAN for communication with the diagnostic tool. For additional information, refer to AUDIO UNIT .

Navigation System Module

The navigation system module (if equipped) is integrated into the audio unit. The navigation system module uses the medium speed CAN for communication with the diagnostic tool. The navigation system module controls the display of vehicle global positioning information. For additional navigation system information, refer to NAVIGATION .

Differential Electronic Module (DEM)

The DEM (if equipped) uses the high speed CAN for communication with the diagnostic tool. The DEM controls the amount of torque to be applied from the engine to all wheels. For additional information, refer to DIFFERENTIAL ELECTRONIC MODULE (DEM) .

Digital Versatile Disc (DVD) Player

The DVD player (if equipped) uses the medium speed CAN for communication with the diagnostic tool. For additional information, refer to DVD PLAYER .

Dual Automatic Temperature Control (DATC) Module

The DATC module (if equipped) is located in the instrument panel below the audio unit. The DATC module uses the medium speed CAN to control automatic climate functions that maintain the vehicle interior temperature at a constant setting. For additional information, refer to DUAL-ZONE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL .

Driver Seat Module (DSM)

The DSM module (if equipped) uses the medium speed CAN for communication with the diagnostic tool. The power driver seat, the power outside rear view mirrors, and the adjustable pedals are controlled by the DSM. For additional information, refer to DRIVER SEAT MODULE (DSM) .

Instrument Cluster

The instrument cluster uses the high speed CAN and the medium speed CAN. The instrument cluster displays a variety of information. For additional information, refer to INSTRUMENT CLUSTER .

Parking Aid Module (PAM)

The PAM (if equipped) is the only module on the international standards organization (ISO) 9141 communications network. The PAM controls the reverse parking aid system. For additional information, refer to PARKING AID MODULE .

Powertrain Control Module (PCM)

The PCM uses the high speed CAN for communication with the diagnostic tool. The PCM controls the engine for better fuel economy, emissions control, failure mode detection and storage. For additional information, refer to INTRODUCTION - GASOLINE article for diagnosis and testing of the PCM.

Restraint Control Module (RCM)

The RCM uses the high speed CAN for communication with the diagnostic tool. The RCM controls the deployment of the air bags based on sensor input. For additional information, refer to RESTRAINTS CONTROL MODULE (RCM) .

Smart Junction Box (SJB)

The SJB uses the medium speed CAN. The SJB is equipped on all vehicles. The SJB is a combination of a multifunction module and an interior power junction box. For additional information, refer to SMART JUNCTION BOX (SJB) .

Transmission Control Module (TCM) - 6-Speed Transaxle

The TCM (if equipped) uses the high speed CAN for communication with the diagnostic tool. The TCM controls transaxle shifting, the electronic pressure control solenoid, and the torque converter clutch. For additional information, refer to TRANSMISSION CONTROL MODULE (TCM) CONTROL FUNCTION .

TCM - Continuously Variable Transaxle (CVT)

The TCM (if equipped) uses the high speed CAN for communication with the diagnostic tool. For additional information, refer to TRANSMISSION CONTROL MODULE (TCM) .

Refer to SYSTEM WIRING DIAGRAMS - FIVE HUNDRED , SYSTEM WIRING DIAGRAMS - FREESTYLE or SYSTEM WIRING DIAGRAMS - MONTEGO for schematic and connector information.

SPECIAL TOOLS REFERENCE TABLE Worldwide Diagnostic System (WDS) Vehicle Communication Module (VCM) with appropriate adapters, or equivalent diagnostic tool 73111 Automotive Meter 105-R0057 or equivalent Flex Probe Kit 105-R025B or equivalent

High Speed Controller Area Network (CAN)

The high speed CAN has an unshielded twisted pair cable, data plus circuit 1908 (WH) and data minus circuit 1909 (BK). The high speed CAN is a high speed communications network used for the anti-lock brake system (ABS) module, the differential electronic module (DEM) (if equipped), the transmission control module (TCM) - 6-speed transaxle, TCM - continuously variable transaxle (CVT), the instrument cluster, the powertrain control module (PCM) and the restraint control module (RCM) communication.

On the high speed CAN, there are 2 terminating modules which are composed of the PCM and the instrument cluster.

Medium Speed Controller Area Network (CAN)

The medium speed CAN has an unshielded twisted pair cable, data plus circuit 2180 (WH/BK) and data minus circuit 2181 (BK/YE). The medium speed CAN is used for the audio unit or audio navigation unit (if equipped), the driver seat module (DSM) (if equipped), the dual automatic temperature control (DATC) module (if equipped), the digital versatile disc (DVD) player (if equipped), the instrument cluster, and the smart junction box (SJB) communications.

On the medium speed CAN, there are 2 terminating modules which are composed of the smart junction box (SJB) and the instrument cluster.

International Standards Organization (ISO) 9141 Communications Network

The ISO 9141 communications network does not permit intermodule communication. When the diagnostic tool communicates to modules on the ISO 9141 communications network, the diagnostic tool must ask for all information; the modules cannot initiate communications. The ISO 9141 communications network does not function if the circuit is shorted to ground or battery voltage. Also, if one of the modules on the ISO 9141 communications network loses power or shorts internally, communications to that module fail.

The ISO 9141 communication network is a single wire network. The ISO 9141 communications network communicates with the parking aid module (PAM).

Possible Causes

1. high speed CAN circuit 1908 (WH) or 1909 (BK) open
2. DEM C3269
3. DEM

1. high speed CAN circuit 1908 (WH) or 1909 (BK) open
2. ABS module C135
3. ABS module

1. high speed CAN circuit 1908 (WH) or 1909 (BK) open
2. TCM C199
3. TCM

1. high speed CAN circuit 1908 (WH) or 1909 (BK) open
2. TCM C168
3. TCM

1. high speed CAN circuit 1908 (WH) or 1909 (BK) open
2. medium speed CAN circuit 2180 (WH/BK) or 2181 (BK/YE) open
3. instrument cluster C220
4. instrument cluster

1. high speed CAN circuit 1908 (WH) or 1909 (BK) open
2. PCM C175b
3. PCM

1. high speed CAN circuit 1908 (WH) or 1909 (BK) open
2. RCM C310b
3. RCM

1. medium speed CAN circuit 2180 (WH/BK) or 2181 (BK/YE) open
2. audio unit or audio navigation unit (if equipped) C240c
3. audio unit or audio navigation unit (if equipped)

1. medium speed CAN circuit 2180 (WH/BK) or 2181 (BK/YE) open
2. DSM C341c
3. DSM

1. medium speed CAN circuit 2180 (WH/BK) or 2181 (BK/YE) open
2. DATC module C228a
3. DATC module

1. medium speed CAN circuit 2180 (WH/BK) or 2181 (BK/YE) open
2. DVD player C9029
3. DVD player

1. ISO 9141 communications network circuit 70 (LB/WH) open, short to ground, or short to voltage
2. DLC C251
3. PAM C3267
4. PAM

1. high speed CAN circuits 1908 (WH) and 1909 (BK) open, short to ground, or short to voltage
2. DLC C251
3. ABS module
4. DEM (if equipped)
5. instrument cluster
6. PCM
7. RCM
8. TCM - 6-speed transaxle
9. TCM - CVT

1. medium speed CAN circuits 2180 (WH/BK) and 2181 (BK/YE) open, short to ground, or short to voltage
2. DLC C251
3. audio unit or audio navigation unit (if equipped)
4. DATC module (if equipped)
5. DSM (if equipped)
6. DVD player (if equipped)
7. instrument cluster
8. SJB

1. fuse
2. DLC C251
3. diagnostic tool
4. circuit 40 (LB/WH) open
5. circuit 1203 (BK/LB) open
6. circuit 1205 (BK) open