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Component Inspection

Check Knock sensor.
1. Substitute with a known - good Knock sensor and check for proper operation.
2. Is the signal normal?
  YES : --> Replace Knock sensor and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  
  NO : --> Substitute with a known - good ECM/PCM and check for proper operation.
  
  --> If the problem is corrected, replace ECM/PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.