Ford FCSD TECHNICAL TRAINING FCS-14000-DL Manuel d'utilisateur télécharger pdf (Page 108)

LESSON 4: ELECTRICAL

Communication Protocols

The 2005 Expedition and Navigator feature the following comunication protocols:

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Medium Speed Controller Area Network (MS-CAN)

The MS-CAN has an unshielded twisted pair cable. The MS-CAN is used for the Vehicle Dynamics Module

(VDM), the Dual Climate Control Seat Module (CCSM), the Dual Automatic Temperature Control (DATC)

module, the instrument cluster, the Parking Aid Module (PAM), Liftgate/Trunk Module (LTM), and the Vehicle

Security Module (VSM) communications. The MS-CAN remains operational even with the severing of one of the

MS-CAN circuits. Communication also continues if one of the MS-CAN circuits are shorted to ground or

voltage, or if some, but not all, termination resistors are lost.

•

High Speed Controller Area Network (HS-CAN).

The HS-CAN has an unshielded twisted pair cable. The HS-CAN is a high speed communications network used

for the Anti-lock Brake System (ABS) module, the instrument cluster, the Transmission Control Module (TCM)

and the Powertrain Control Module (PCM) communication. The HS-CAN remains operational even with the

severing of one of the HS-CAN circuits. Communication also continues if one of the HS-CAN circuits are shorted

to ground or voltage, or if some, but not all, termination resistors are lost.

•

ISO9141 Network.

The ISO 9141 communications network is a single circuit 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 request all information, or initiate

module commands. 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 will fail.

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Standard Corporate Protocol (SCP) Network.

The SCP communications network (Navigator with navigation system only) remains operational even if one of

the SCP communications network circuits are severed. Communications also continue if one of the SCP

communications network circuits are shorted to ground or voltage, or if some, but not all termination resistors are

lost. The SCP communications network allows inter-module communication.

Module Programability

•

Many of the Body Modules on the 2005 Expedition/Navigator are flash capable at the dealership level. Body

module flash capability will be coming to dealerships in the Fall of 2005. These modules are the Global

Driver’s Seat Module, the Dual Climate Control Seat Module, the Vehicle Security Module, and the

Instrument Cluster. Delivery methods for module updates will be the same as those used currently - CDs and

FORDSTAR.

2005 Expedition/Navigator New Model Technician Training02-SEP-044-8

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Ford FCSD TECHNICAL TRAINING FCS-14000-DL Manuel d'utilisateur Page 108