Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information SRS-U002800

Condition
The control modules transmit and receive information via a standardized serial communication method - CAN (Control Area Network). The Supplemental Restraint System Module (SRS) also has an internal CAN network with one or several systems connected (market dependent).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Communication on the internal CAN interrupted by another control module or one of the control module's own messages causes interruptions on the internal CAN.
- Incorrect value runs longer than 2.5 seconds.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Starting the control module's CAN communication.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met. In the event of system communication problems, it is not possible to communicate with the control module. Therefore it will only be possible to read off the fault if it is intermittent.





Substitute value
- Control module shuts itself off ("bus-off").

Hint: The control module is off until the power supply has been broken. When the power supply is connected the control module will make a new attempt to communicate.

Possible source
- Short-circuit between the internal CAN wiring.
- Open-circuit in the internal control area network (CAN) wiring.
- Internal fault in another control module in the internal control area network (CAN).
- Damaged supplemental restraint system module (SRS).

Fault symptom[s]
- Warning lights and chimes/Supplemental Restraint System (SRS) indication/no indication
- Text window and warning symbol/Yellow symbol and text message