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Home >> Mazda >> 2000 >> MX-5 Miata Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1609: Powertrain Control Module (Pcm) Knock Circuit Malfunction >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Check service bulletins. Go to next step.
  2. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Start engine. If same DTC is not present, go to next step. If same DTC is present, replace PCM. Go to next step.
  3. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. If any DTC is present, go to appropriate test. If no DTC is present, test is complete.
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