VIDEO

Informace

Chevrolet

Chevrolet P1B8F

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 P1B8F

Basic error definition

Battery Voltage. Algorithm Based Failures. Signal Compare Failure

Cause of DTC

The Trailer module (TRM) checks its own system voltage by comparing the direct voltage with the system voltage in Central electronic module (CEM). The information about the system voltage in Central electronic module (CEM) is sent via CAN to Trailer module (TRM). The diagnostic trouble code (DTC) is stored if the control module detects that: The system voltage differs by more than 2.0 V. Incorrect value runs longer than 1 second. The control modules test for the diagnostic trouble code (DTC) starts in the event of: Starting the control modules CAN communication. Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.