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Home >> Cadillac >> 2001 >> Catera >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 3.0L >> Diagnostic Tests >> DTC P0601: Control Module Read Only Memory (ROM) >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing powertrain diagnostic system check, go to next step.
  2. Using scan tool, clear DTCs. Turn ignition off and wait 60 seconds. Turn ignition on and check DTC information. If this DTC reset, go to next step. If this DTC did not reset, see DIAGNOSTIC AIDS  .
  3. Replace ECM. Program replacement ECM using required equipment. See ENGINE CONTROL MODULE  under PROGRAMMING. Ensure ECM is programmed with theft deterrent code currently on vehicle. After repairs, go to next step.
  4. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine and operate vehicle within code enable criteria. Check for DTCs. If this DTC resets, go to step  2 . If this DTC does not reset, go to next step.
  5. Using scan tool, observe stored information. If scan tool displays any DTCs that you have not diagnosed, see DIAGNOSTIC TROUBLE CODE DEFINITIONS  . If no DTCs are present, system is okay.
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