VIDEO

Informace

Mercedes-Benz

Mercedes-Benz P1178

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

Mercedes-Benz P1178

Basic error definition

Gauge Control Module Lost Communication With ACC Unit (ACC message)

Cause of DTC

Poor communication between the Gauge Control Module and ACC Unit. NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. If the HDS does not communicate with the ACC unit, the ACC indicator stay on, and no ACC DTCs are stored, go to symptom troubleshooting for ACC indicator does not go off, and no DTCs are stored.