Escape 2WD V6-3.0L (2009)
Information Bus: Initial Inspection and Diagnostic Overview
Special Tools Used With Diagnostics
Communications Network
Principles Of Operation
Communications Network
Principles of Operation
Vehicle communication utilizes both International Standards Organization (ISO) 9141 and Controller Area Network (CAN) communications. ISO 9141
is used for diagnostic use only, and CAN is a method for transferring data among distributed electronic modules via a serial data bus.
The vehicle is equipped with 3 module communication networks:
-
ISO 9141
-
Medium Speed Controller Area Network (MS-CAN)
-
High Speed Controller Area Network (HS-CAN)
ISO 9141 Communications Network
The ISO 9141 communications network is a single wire network. The ISO communications network does not permit intermodule communication and is
only used for the Parking Aid Module (PAM). When the scan tool communicates with the parking aid module, the scan tool must request all information,
the module cannot initiate communications.
The ISO network operates at a maximum data transfer speed of 10 Kbps for bus messages and is designed for scan tool to module diagnostic use only.
The following fault chart describes the specific ISO 9141 network failures and their resulting symptom:
