Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Brake Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The control modules exchange information over a network via a standardized serial communication interface - CAN (Controller Area Network). Control modules transmit and receive information. The diagnostic trouble code (DTC) is stored if the control module registers that communication is subject to interference or missing.

Substitute Value 

• CAN communication blocked.
• Anti-spin function blocked.

Possible Source 

• Defective control module.

Fault symptom[s] 

• ABS warning lamp lit.
• Anti-spin warning lamp lit.
• Brake circuit not functioning, warning lamp lit.
• No vehicle speed displayed (because of missing signal to the combined instrument panel).