VIDEO

Informace

Chevrolet

Chevrolet P02A1

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 P02A1

Basic error definition

Class 2 Circuit Short to Battery

Cause of DTC

Key on or engine running; system voltage supplied to the module is in the normal operating voltage range, vehicle power mode requires serial data communication to occur, and the ECM did no detect any valid messages on the Class 2 circuit, or the voltage condition detected on the Class 2 circuit was low for 3 seconds. Modules connected to the Class 2 circuit check for data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. In addition, each module transmits Node Alive messages on the Class 2 data circuit once every 2 seconds. If the module detects a high voltage condition on the Class 2 serial data circuit for 3 seconds, it sets U1300. Note: This code is set by loss of communication. Look in All of the modules for this trouble code - the one without it has a problem.