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Home >> Nissan-Datsun >> 2017 >> Versa Note SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 3) >> DTC/Circuit Diagnosis >> DTC P0420: Three Way Catalyst Function >> Component Function Check >> Diagnostic Test
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Diagnostic Test

  1. PERFORM COMPONENT FUNCTION CHECK

    G-21Without 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 under the following condition.
      ECM Condition Voltage (V)
      Connector + -
      Terminal Terminal
      F11 50
      (HO2S2)      		 59 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 

    Go to DIAGNOSIS PROCEDURE .

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