P0AA5

P0AA500

Diagnosis information - High-voltage battery control unit

Contactor / Pre-charging contactor

DANGER
High voltage.
Death or severe injuries due to high voltage or high current.

- De-energise the vehicle in accordance with the guidelines.
- Work must not be performed on parts carrying a high voltage.

--> Please observe the following document in the PIWIS information system:

- 2X00IN Activation/commissioning of the High-voltage vehicle network

Diagnostic conditions
The control unit must be active in order to test internal function sequences and diagnosable inputs/outputs.
In the event of a fault, check whether the fault is permanently >present<. To perform the check, erase the fault memory, meet the diagnostic conditions and read out the fault memory again.
- Ignition on

Possible fault causes
- does not close
- does not open

Fault effects
- Function not available or available only to a limited extent