Fault Code 5520

Fault Code 5520

CAN data bus (drive)

Diagnostic conditions
- Ignition on
- Battery positive voltage > 10 V
- Electrical test of CAN bus

Possible cause of fault
- Short circuit between the two CAN leads (CAN high and CAN low)
- Short circuit between CAN high and ground
- Short circuit between CAN low (drive) and B+
- A control module connected to the CAN bus is faulty

Affected terminals
PSM 5.3 Terminals 61, 63
PSM 5.7: Terminals 24, 40

Diagnosis/troubleshooting PSM 5.3

NOTE: The following troubleshooting applies for PSM 5.3; 911 Carrera 4; model year 1999.

Work Instruction 1 - 5:

Work Instruction 6 - 10:

Work Instruction 11 - 13:

Diagnosis/troubleshooting PSM 5.7

NOTE: The following troubleshooting applies to PSM 5.7 as of model year 2001.

Work Instruction 1 - 2:

Work Instruction 3 - 7:

Work Instruction 8 - 13: