VIDEO

Informace

Chevrolet

Chevrolet P1431

See the basic definition of a diagnostic error. This will help you to clarify the main causes of the fault code. You will understand the program of the control unit
Basic DTC analysis according to OBD2 protocol standard.

OBD2 or On-Board Diagnostics displays messages for basic group styles. More comprehensible code composition has been standard since 2000. The DTC code consists of five characters and its composition will be shown in this video

Insight into programming

The basic unit for the operation of any computer is the bit. Logic 0 and 1 are expressed by a single bit. Diagnostics The error code is composed of 16 bits. The first two bits define one of the four basic circuits. The video will show you a comprehensive overview of the composition of the error report

A diagnostically understandable description of the Diagnostic Trouble Code

Chevrolet P1431

Basic error definition

Loss of ATC Class 2 Communication

Cause of DTC

Key on or engine running; and a module detected that it could not communicate with the ATC controller for 1 second. Modules connected to the Class 2 circuit monitor for data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module that sent the message for State of Health monitoring (Node Alive messages). Once a module learns an identification number, it will monitor for that modules Node Alive message. Each module on the Class 2 circuit that is powered and performing functions that require detection of a communications malfunction is required to send a Node Alive message every two seconds. When no message is detected from a learned identification number for five seconds, a DTC U1xxx (XXX is equal to the 3-digit identification number) is set.