LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saab >> 2011 >> 9-4X Aero >> Repair and Diagnosis >> Brakes >> Traction Control >> TCS/Esp >> Fault diagnosis, fault codes >> DTC C1255: Electronic Control Unit Performance Malfunction; DTC C1256: Control Module Programming Checksum Error Malfunction >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

  1. Switch ignition ON.
  2. Check that DTC C056D or C056E is not generated.
  3. If any of the specified DTCs has been triggered, see TSC/ESP DTC Index .
  4. Replace K17 electronic brake control module.
  5. Verify that DTCs C1255 or C1256 are not set when the vehicle is maneuvered as specified in "Conditions for running of DTCs" above.
  6. If any of these DTCs is generated:
  7. Replace the control device that set the DTC.
  8. If none of these DTCs are generated:
  9. All OK.
scientia non olet · About LEMON Manuals