VIDEO

Informace

Hummer

Hummer B1004

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

Hummer B1004

Basic error definition

Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit Low Voltage

Cause of DTC

With the engine running, engine speed a minimum of 4,800 rpm (Variable that is depending on the engine load). The rocker arm oil control solenoid is ON, the rocker arm oil pressure switch remains ON. The execution time is once per driving cycle and DTCs P2648, P2649 are not active. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.