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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (4 Of 4)) >> DTC/Circuit Diagnosis >> U1040 Eng Comm Circuit >> DTC Diagnosis Procedure >> PR25DD engine

PR25DD engine

WARNING: This page is about a different variant/trim than selected.
  1. CHECK ACTIVE GRILLE SHUTTER SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect active grille shutter harness connector.
    4. Check the continuity between ECM harness connector and active grille shutter harness connector.

      +

      -

      Continuity

      ECM

      Active grille shutter

      Connector

      Terminal

      Connector

      Terminal

      F90

      98

      E249

      2

      Existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace error-detected parts.

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