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Home >> Nissan-Datsun >> 2020 >> Altima SL, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Pr25DD) (2 Of 2) >> Symptom Diagnosis >> ASCD Main Switch Does Not Turn On/Off >> Diagnosis Procedure >> PR25DD engine

PR25DD engine

  1. CHECK DTC WITH ECM 

    Check that DTC is not displayed.

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Perform trouble diagnosis relevant to DTC indicated.

  2. CHECK ASCD MAIN SWITCH 

    Refer to Component Function Check .

    Is the inspection result normal?

    YES

    Refer to Component Inspection .

    NO

    Repair or replace malfunctioning part.

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