RCU family
RCU_a027_DIchassisCtrlChecksum
Not Available
What does the RCU_a027_DIchassisCtrlChecksum alert mean?
Drive Inverter (DI) chassis control message checksum is incorrect.
What you'll see in your Tesla
- Not Available
What triggers it
The RCU receives the DI_chassisControl CAN message with incorrect CRC for longer than 200 milliseconds.
When it clears
The Redundant Control Unit (RCU) receives the DI_chassisControl Controller Area Network (CAN) message with correct Cyclic Redundancy Check (CRC) for 200 milliseconds.
Potential impact
There may be an issue with the transmitting Electronic Control Unit (ECU).
Affected models
Model Y 2025+
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