Manufacturer Code Charts: 2817

[8] No or incorrect CAN message from control unit Instrument cluster: Signal faulty

Test 1: Check component CAN bus.

1. Check component CAN bus.
If several fault codes regarding CAN communication have occurred, the following causes of the fault are likely

- Open circuit in voltage supply to the control modules involved
- Short circuit or open circuit of CAN wires
- Connector sleeves of the CAN bus
If CAN communication between control module CDI 3 and at least one other control module is fault-free, there is no fault at the CAN element of the control module CDI 3.In this case proceed as follows:

- Read fault memory of control module to which there is a fault in the communication.If a CAN fault regarding communication with control module CDI 3 is present in this control module, then first of all test CAN lines between the two control modules.
End of test