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DTC C1255 Or DTC C1256: EBCM Internal Malfunction

  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
  2. Install scan tool. Turn ignition on, with engine off. Using scan tool, clear DTCs, then perform automated test. Recheck DTCs. If DTC resets as a current DTC, go to next step. If DTC does not reset, problem is intermittent. See INTERMITTENTS & POOR CONNECTIONS  under DIAGNOSIS & TESTING.
  3. Replace EBCM. After replacing EBCM, go to next step.
  4. Using scan tool, clear DTCs, then perform automated test. Recheck DTCs. If DTC resets, go to step  2. If DTC does not reset, system is okay.
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