VIDEO

Informace

Mazda

Mazda B1144

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 B1144

Basic error definition

Problem in 1st Clutch and 1st Clutch Hydraulic Circuit (1st gear incorrect ratio)

Cause of DTC

The Powertrain Control Module (PCM) computes the ratio of the input shaft (mainshaft) speed to the output shaft (countershaft) speed. When the ratio is not the 1st gear ratio, it is detected as a malfunction of the hydraulic circuit or the 1st clutch. (Symptom 1) The actual gear ratio must match one of these conditions for at least 12 seconds with the 1st gear command: Actual gear ratio is greater than the 1st gear ratio by a factor of 1.2 Actual gear ratio is less than the 1st gear ratio by a factor of 0.75 (Symptom 2) The actual gear position is neutral for at least 3 seconds and then the gear up-shifted from 2nd to 3rd, even though 1st gear shift is commanded. NOTE: Before you troubleshoot, record all freeze data and any on-board. snapshot,