Scania SC DTC 3 Voltage supply

SC SC control unit · Scania · 2 variants

Code 3 (decimal). Some diagnostic tools show it in hexadecimal as 0003.

In short

The voltage supply to the tachograph is missing or is too low.

Variant 1

Applies to: SC1 (TCO)SC3 (TCO)

What does Scania SC fault code 3 mean?

The voltage supply to the tachograph is missing or is too low.

What causes Scania DTC 3?

- Short circuit or open circuit in the tachograph power supply. - Low battery capacity. - The batteries have been disconnected.

How to fix Scania SC fault code 3?

  1. Note: When disconnecting the batteries: put a workshop card in the tachograph before disconnecting to avoid the fault code being set when the batteries are reconnected.
  2. Check the circuit for short circuits and open circuits.
  3. Check the battery capacity and alternator charging.

Variant 2: Voltage feed

Applies to: SC5 (TCO)

Detection

The voltage supply to the tachograph has been absent or too low.

Possible cause

- Short circuit or open circuit in the tachograph power supply. - Low battery capacity. - The batteries have been disconnected.

How to fix

  1. Note: When disconnecting the batteries: put a workshop card in the tachograph before disconnecting to avoid the fault code being set when the batteries are reconnected.
  2. Check whether there is a short circuit in the cable harness.
  3. Check whether there is an open circuit in the cable harness.
  4. Check the connectors.
  5. Check the battery capacity.
  6. Check the voltage supply voltage from the alternator.

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

Code 3 in other Scania systems

Compare code 3 in every system →