Scania SC DTC 64779 No CAN message

SC SC control unit · Scania · 3 variants

Code 64779 (decimal). Some diagnostic tools show it in hexadecimal as FD0B.

In short

Fault in the CAN communication on the external CAN bus.

Variant 1

Applies to: SC1 (TCO)

What does Scania SC fault code 64779 mean?

Fault in the CAN communication on the external CAN bus.

What causes Scania DTC 64779?

Open circuit in the external CAN bus cable harness. Fault on tachograph.

How to fix Scania SC fault code 64779?

  1. Check the cable harness and harness-to-harness connectors.
  2. Check tachograph connection C.

Variant 2

Applies to: SC3 (TCO)

Detection

Open circuit in the external CAN bus.

Possible cause

- Fault in the cable harness. - Communication fault in CAN bus. - Fault in a unit connected to the external CAN network.

How to fix

  1. Check the cable harness connected to connection C in the tachograph.
  2. Check if any unit is connected to the external CAN bus.
  3. Remove any such unit and see if the fault code clears.

Variant 3

Applies to: SC5 (TCO)

Detection

Open circuit in the external CAN bus.

Possible cause

- Fault in the cable harness. - Communication fault in CAN bus. - Fault in a unit connected to the external CAN network.

How to fix

  1. Check the cable harness connected to tachograph connection C.
  2. Check harness-to-component connector C and harness-to-component connectors connected to C.
  3. Check if any unit is connected to the external CAN bus.
  4. Remove any such unit and see if the fault code clears.

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