LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Engine Control System (DTCS) (5.6L) (3 Of 8)) >> DTC/Circuit Diagnosis >> U1040 Eng Comm Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  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.

      ECM

      Active grille shutter

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F79

      86

      E8

      3

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

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace error-detected parts.

scientia non olet · About LEMON Manuals