VIDEO

Informace

Nissan

Nissan B1129

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

Nissan B1129

Basic error definition

Evaporative Emission System Vent Control Circuit

Cause of DTC

Engine started, engine running at a steady cruise speed, canister vent solenoid enabled, and the PCM detected an unexpected voltage condition on the Canister Vent solenoid circuit. Note: To verify normal functioning, monitor the Evaporative Emission (EVAP) CV solenoid signal PID EVAPCV and the signal voltage on the PCM control side. With the valve open, the EVAPCV PID indicates 0% duty cycle and a voltage approximately equal to battery voltage. When the valve is commanded fully closed, the EVAPCV PID indicates 100% duty cycle, and a minimum voltage drop of 4 volts is normal. Output Test Mode (OTM) may be used to switch the output on and off to verify function.