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Home › Saab › 2010 › 9-5 › Repair and Diagnosis › Brakes › Anti-Lock Brakes › TCS/Esp › Fault diagnosis, fault codes › DTC C123C: Electronic Brake Control Module RAM Malfunction; DTC C1255: Electronic Control Unit Performance Malfunction; DTC C1256: Control Module Programming Checksum Error Malfunction › Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, verify that DTC C0569, C056D, or C056E is not present in the electronic brake control module (EBCM).
  2. If any listed DTC is present, refer to TCS/ESP DTC Index  to diagnose that DTC prior to this diagnostic.
  3. Replace the K17 Electronic Brake Control Module and verify the DTC does not reset.
  4. If the DTC resets, replace the module that set the DTC.
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