Fault Code 5520

Fault Code 5520

CAN data bus
Entire CAN drive communication disturbed

Diagnostic conditions
- Ignition on

Possible cause of fault
- Short circuit to B+/ground/with respect to each other or open circuit or incorrect allocation in CAN drive
- One or several control units faulty, which are connected directly to the CAN drive
- ABS control unit faulty

Affected pins
Pin 24 and pin 40

Diagnosis/troubleshooting for vehicles with manual transmission.

NOTE: Before troubleshooting, read out the fault memory of the DME and the instrument cluster and, if necessary, remedy faults.

Part 1:

Part 2:

Part 3:

Diagnosis/troubleshooting for vehicles with Tiptronic transmission

NOTE: Before troubleshooting, read out the fault memory of the DME, Tiptronic and the instrument cluster and, if necessary, remedy faults.

Part 1:

Part 2:

Part 3:

Part 4: