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Home >> Nissan-Datsun >> 2013 >> Sentra SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes & Symptom Tests) >> DTC/Circuit Diagnosis >> DTC P0420: Three Way Catalyst Function >> Component Function Check
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Component Function Check

  1. PERFORM COMPONENT FUNCTION CHECK 

    Without CONSULT

    1. Start engine and warm it up to the normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Restart engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
    4. Let engine idle for 1 minute.
    5. Open engine hood.
    6. Check the voltage between ECM harness connector terminals as per the following condition.
      ECM Condition Voltage (V)
      Connector + --
      Terminal
      F24 22 23 Keeping engine speed at 2500 rpm constant under no load The voltage fluctuation cycle takes more than 5 seconds.
      • 1 cycle: 0.6 - 1.0 → 0 - 0.3 → 0.6 - 1.0

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Proceed to "DIAGNOSIS PROCEDURE ".