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Home >> Nissan-Datsun >> 2018 >> NV200 S >> 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

Component Function Check

  1. PERFORM COMPONENT FUNCTION CHECK 

    SYMBOL 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

      F10

      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 .

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