Scania MBS DTC 546 #Not implemented. Electrical error on CAN bus 5

MBS Centralina MBS · Scania

Codice 546 (decimale). Alcuni strumenti di diagnosi lo mostrano in esadecimale come 0222.

In breve

The CAN-controller of CAN bus 5 has entered state bus-off, which indicates a communication error There is a short circuit on CAN bus 5.

Si applica a: MBS3 (MBS)

Cosa significa il codice di errore Scania MBS 546?

The CAN-controller of CAN bus 5 has entered state bus-off, which indicates a communication error There is a short circuit on CAN bus 5.

Cosa causa il DTC 546 di Scania?

• Defect wiring of CAN-bus 5: - 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 CAN-bus 5.

Come reagisce il sistema?

Functions dependent on information from CAN bus 5 are degraded, such as roof hatches and the HPAC.

Quali sono i sintomi?

If equipped with electrical roof hatches and/or a HPAC, these may not work as intended.

Come risolvere il codice di errore Scania MBS 546?

  1. The result of the receiving and transmitting messages is evaluated.
  2. Check connector for CAN bus 5 on MBS.
  3. Check wiring for CAN bus 5:
  4. Measure the resistance (with the battery disconnected) between CAN-high and CAN-low.
  5. It should be close to 60 ohm (one 120 ohm termination resistor in each end of the CAN-bus).
  6. Measure the resistance (with the battery disconnected) between CAN-high on MBS and CAN-high on any other unit (e.g.
  7. MBS_x) on CAN bus 5.
  8. It should be close to zero ohm.
  9. Measure the resistance (with the battery disconnected) between CAN-low on MBS and CAN-low on any other unit on CAN bus 5.
  10. It should be close to zero ohm.

Queste informazioni sono solo indicative. Segui sempre il manuale di officina del produttore e le procedure di sicurezza; in caso di dubbio, contatta un'officina autorizzata.

Codice 546 negli altri sistemi Scania

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