VIDEO

Informace

Mitshubishi

Mitshubishi B1484

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

Mitshubishi B1484

Basic error definition

Fuel Pump Control Module Open Circuit To Fuel Pump

Cause of DTC

GENERAL OPERATION: When the Powertrain Control Module (PCM) receives a ‘Start’ or ‘Run’ signal, it energizes the Fuel Pump Relay which sends a continuous 12.0 volt supply to the Fuel Pump Control Module (FPCM). Depending on vehicle configuration, the Fuel Pump Relay can be either a removable component or be part of the Printed Circuit Board inside the Power Distribution Center (PDC) and not separately replaceable. The PCM sends commands to the FPCM through a Pulse Width Modulated (PWM) control signal. The FPCM in turn regulates the PWM voltage output to the Fuel Pump Assembly based on inputs from the Fuel Rail Pressure (FRP) Sensor and other engine demands. The PWM signal will vary from 10-100% to maintain the proper fuel pressure in the system. This is a Constant Pressure Fuel system which means any fuel pressure test performed on the Fuel Pump should show a continuous pressure (regardless of the changes in PWM).