Gm Global Technolgoy Operations, Inc.

Natalie Ann Wienckowski

Xinyu Du

Shengbing Jiang

Yilu Zhang

Joseph E Ploucha

Cheryl A Williams

Atul Nagose

Michael A Sowa

Alaeddin Bani Milhim

Hamed Kazemi

Anthony Anderson

Kenneth M Hromada

Hadyan Sani Ramadhan

Jacob Andrew Gerrit Kuiper

A method for determining a two wire open fault on a two wire communications bus including determining a threshold in response to a first data from a first electronic control unit and a second data received from a second electronic control unit via the two wire communications bus, wherein the first data includes a first plurality of dominant bits and a first plurality of recessive bits and the second data includes a second plurality of dominant bits and a second plurality of recessive bits, determining a current network health indicator in response to a third data from the first electronic control unit having a third plurality of dominant bits and a third plurality of recessive bits, and generating a double wire open fault error report in response to the current network health indicator exceeding the threshold.

Double open CAN bus wire fault identification

In exemplary embodiments, methods, systems, and vehicles are provided, with the vehicle including vehicle systems, a communication bus, a first processor, and a communication bus transceiver. The first processor is configured to at least facilitate: determining whether a potential safety concern is present pertaining to control the vehicle systems; and providing communications along the communication bus of the vehicle, the communications including an indication of the potential safety concern. The communication bus transceiver is coupled to the first processor and configured to at least facilitate: recognizing the indication of the potential safety concern; and inhibiting the control for the vehicle systems when the indication of the potential safety concern is recognized by the communication bus transceiver.

Eliminatinon of safety enable hardware through use of can transceiver wakeup functions

A system for providing privileged access to an internal vehicle communication network is provided. The system includes a presentation network bus configured to provide listen-only access to a subset of in-vehicle networks, a security system configured to enable access to the presentation network bus by verifying access credentials, and a diagnostic service system configured to control access to the presentation network bus. The diagnostic service system is configured to receive a diagnostic service request after the access credentials have been verified to enable the presentation network busses for listen-only access to the subset of the in-vehicle networks. The presentation network busses may be enabled for the listen-only access after credential verification by the security system and in response to receipt of a diagnostic service request from the diagnostic service system requesting that the presentation network busses be enabled.

Privileged, diagnostic link connector based network monitoring capabilities within a vehicle employing a gateway module used to isolate and secure vehicle networks

A controller area network (CAN) includes a CAN bus having a CAN-H wire, a CAN-L wire, and a pair of CAN bus terminators located at opposite ends of the CAN bus. The CAN further includes a plurality of nodes including controllers wherein at least one of the controllers is a monitoring controller. The monitoring controller includes a CAN monitoring routine for detecting a wire short fault in the CAN bus and its location.

Method and apparatus for short fault detection in a controller area network

A controller area network (CAN) includes a CAN bus with a CAN-H wire, a CAN-L wire, a pair of CAN bus terminators located at opposite ends of the CAN bus, each terminator having a corresponding known terminator resistance value, a plurality of nodes including controllers wherein at least one of said controllers is a monitoring controller. The monitoring controller includes a detection control routine for detecting the presence of a wire-open fault on the CAN bus, including determining a CAN bus resistance, and determining a wire-open fault on the CAN bus based upon the determined CAN bus resistance and the terminator resistance values.

Method and apparatus for open-wire fault detection and diagnosis in a controller area network

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Sterling Heights, MI, United States of America

Natalie Ann Wienckowski