VIDEO

Informace

Mazda

Mazda B2937

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

Mazda B2937

Basic error definition

HO2S Heater (Bank 1 Sensor 1) Circuit Low Input

Cause of DTC

Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, the exhaust system must be properly sealed between the catalytic converter and the cylinder head, the coolant temperature must be 80 degrees Celsius, and the oxygen sensor heater for oxygen sensor before the catalytic converter must be properly functioning. The DME detected the HO2S signal was in a negative voltage range referred to as character shift downward. This code sets when the HO2S signal remains in a low state. In effect, it does not switch properly in the closed loop operation. The HO2S (before the three-way catalytic converter) has a short circuit to ground that has lasted longer than 200 seconds.