Scania MGU DTC 4864 Circuit for voltage class B.

MGU MGU control unit · Scania

Code 4864 (decimal). Some diagnostic tools show it in hexadecimal as 1300.

In short

Alternating voltage supply to the electric machine is missing.

Applies to: MGU2MGU2 (MGU2X)MGU2 (MGUC2)MGU2 (MGUC2X)

What does Scania MGU fault code 4864 mean?

Alternating voltage supply to the electric machine is missing.

What causes Scania DTC 4864?

- Fault in cable harness or connectors for voltage class B. - Fault in electric machine M33.

How does the system react?

- Yellow warning indication of an electric drive system fault is displayed. - No electric drive is possible.

What are the symptoms?

- Impaired performance when driving off. - Impaired performance when changing gears.

How to fix Scania MGU fault code 4864?

  1. Check the cable harness and connectors for alternating voltage between the electric machine and inverter (MGU).
  2. Renew the electric machine.
  3. When renewing the electric machine, run Calibrating electric machine rotor position.
  4. Renew the inverter.
  5. When renewing the inverter, run Calibrating rotor position on the electric machine.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 4864 in other Scania systems

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