CD0487
CriticalCD0487 — FlexRay Bus Failed to Start in BCP ZGM
Description
What the Code Means
Code CD0487 records that the central gateway module ZGM (Body Domain Controller) failed to start the FlexRay bus. FlexRay is a high-speed communication bus that critical vehicle systems use to exchange data. Until the bus starts, the modules connected to it can't communicate with each other or with the ZGM.
Possible causes are a faulty ZGM itself, a wiring problem on the bus (short or open circuit), or a software fault.
Symptoms
Symptoms
- Multiple warning lights on the instrument cluster
- loss of communication with individual control units
- possible handling and driveability problems
Causes and fixes
Diagnosis and Repair
- Check the FlexRay wiring for shorts and opens.
- Run diagnostics through ISTA.
- Update the ZGM software.
- If the fault is confirmed, replace the ZGM.
Possible secondary damage
Secondary Problems
- Loss of FlexRay communication can shut down critical systems: ABS, DSC, and engine management;
- driving in this state is unsafe — don't put off diagnosis.