Operation CHARM: Car repair manuals for everyone.

Self-Diagnostics

The EBCM performs system self-diagnostics. The EBCM can detect and often isolate system malfunctions. When a malfunction is detected, the EBCM sets a DTC. The DTC represents the malfunction. The EBCM may disable any of the following functions as necessary for the duration of the ignition cycle:
- Antilock Brake System (ABS)
- Traction Control System (TCS)
- Vehicle Stability Enhancement System (VSES)
- Variable Effort Steering (YES)
The EBCM uses class 2 serial data messages to tell the instrument cluster to turn on the indicators or messages associated with the systems.