Scania COMMUNICATOR DTC 1025 High supply voltage

COMMUNICATOR Communicator (C200 / C300 / C400) · Scania

Code 1025 (decimal). Some diagnostic tools show it in hexadecimal as 0401.

In short

The supply of current to the control unit is too high. The fault code is activated when the supply voltage exceeds 33 V for less than 1 s and the ignition voltage is on.

Applies to: C200C300

What does Scania COMMUNICATOR fault code 1025 mean?

The supply of current to the control unit is too high. The fault code is activated when the supply voltage exceeds 33 V for less than 1 s and the ignition voltage is on.

What causes Scania DTC 1025?

The control unit is incorrectly connected to the 24 V supply voltage.

How to fix Scania COMMUNICATOR fault code 1025?

  1. Check all connections.
  2. Check that the cable harness for the supply voltage is connected as per the electrical diagram.
  3. Check the continuity in the cable harness with a multimeter.
  4. Check 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 1025 in other Scania systems

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