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DTC › ACUB1 ACUB1 / 0221 2 variants

Communication error. The CAN-controller of the InterSAGA CAN bus has entered state bus-off. There might be a short circuit on the HCU CAN bus

â–¶ How to fix

No repair guidance recorded for this DTC.

What you'll see

No driver-visible symptom recorded.

System reaction

• Functions dependent on information on the SAGA B subCAN bus from ACUB1 might be degraded. Examples listed below. - Degraded autonomous function.

Diagnostic depth

Detection

The DTC is set to active if CAN controller of the InterSAGA CAN is in the state bus-off. The DTC is set to inactive if the CAN-controller is not in state bus-off for 1100 ms. The DTC is not validated (stored) if: • the ignition is turned off • first 2 seconds after ignition on • the supply voltage is below 22 volt • the supply voltage is above 32 volt

Possible cause

• Defect wiring of SAGA B subCAN-bus: - short circuit between CAN-high and CAN low. - short circuit between CAN-high and supply voltage. - short circuit between CAN-high and ground. - short circuit between CAN-low and supply voltage. - short circuit between CAN-low and ground. • Defect ECU unit(s) on the SAGA B subCAN bus.

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