Scania AUS DTC 31 GPS antenna, short circuit

AUS Audio System · Scania · 2 variants

Code 31 (decimal). Some diagnostic tools show it in hexadecimal as 001F.

In short

Short circuit to ground.

Variant 1

Applies to: AUS4 (CUI)

What does Scania AUS fault code 31 mean?

Short circuit to ground.

What causes Scania DTC 31?

- Fault in harness-to-component connector. - Fault in cable harness. - Fault in antenna U26.

What are the symptoms?

GPS navigation and other GPS-related functions are not working, since no GPS signal can be received by the electronic control unit.

How to fix Scania AUS fault code 31?

  1. Disconnect the GPS cable harness (blue contact housing) from the antenna (U26).
  2. Turn the voltage off and on and reconnect the vehicle connection.
  3. Check whether any new circuit break fault codes occur.
  4. If this is the case, the fault is probably due to the antenna.
  5. Disconnect the antenna and leave the cable harness connected to the switched-on electronic control unit.
  6. Measure between earth and signal on the cable harness.
  7. The measurement result should be approximately 5 V.
  8. Check for any short circuiting on the rest of the cable harness between the antenna and the electronic control unit as described in step 2.
  9. Check that the control unit has the latest software.

Variant 2

Applies to: AUS4 (CUI)

Detection

Short circuit to ground.

Possible cause

Possible causes: - Fault on the harness-to-component connector - Fault in the cable harness - Fault in the antenna U26

System reaction

GPS navigation and other GPS-related functions are not working, since no GPS signal can be received by the electronic control unit.

How to fix

  1. Disconnect the GPS cable harness (blue contact housing) from the antenna (U26).
  2. Turn the voltage off and on and reconnect the vehicle connection.
  3. Check whether any new circuit break fault codes occur.
  4. If this is the case, the fault is probably due to the antenna.
  5. Disconnect the antenna and leave the cable harness connected to the switched-on electronic control unit.
  6. Measure between earth and signal on the cable harness.
  7. The measurement result should be approximately 5 V.
  8. Check for any short circuiting on the rest of the cable harness between the antenna and the electronic control unit as described in step 2.
  9. Check that the control unit has the latest software.

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

Code 31 in other Scania systems

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