General Information

Head Unit

U1540 Wakeup Line Test Failed at Amplifier Unit - 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 does not receive response signal from the Amplifier after sending wake up line signal to Amplifier.

DTC Detecting Condition





Diagnostic Circuit Diagram