General Information

Component Location





General Description

The purpose of RBD (Ring Break diagnosis) Test is localizing a fatal error in the network. The RBD-Test check a ring break position.
The XdB-Test is a process which analyzes the transmission quality of every optical segment on the MOST network Also, Head unit test the component status by Wake up line diagnosis.

DTC Description

This code is set when Head unit detects wake up line circuit short to battery.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data




FIG. 1) Normal waveform of wake up line during wake up line test