Diagnosis instructions
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The Power Control Unit (PCU) assumes the following functions in addition to energy management:
- K-bus communication
- Self-test
- Monitoring the system
- Loading via a trickle charger
- Supporting the after-run when terminal 30B is active.
- Providing support in auxiliary heater operation and independent ventilation function (activation possible by timer, remote key and direct activation)
- If the vehicle has reached the bottom startability limit and an engine start is no longer possible: Prevention of a breakdown by reloading from the auxiliary battery to the system battery with a relevant Check Control message,