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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 220 (Engine Control System (DTCS) (5.6L) (6 Of 8)) >> DTC/Circuit Diagnosis >> P0603 ECM >> 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 ECM POWER SUPPLY AND GROUND CIRCUIT 

    Perform trouble diagnosis for ECM power supply and ground circuit. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 2 .

    NO

    Repair or replace error-detected parts.

  2. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Turn ignition switch ON.
    2. Erase DTC.
    3. Perform DTC confirmation procedure. Refer to DTC Description .

    Is the 1st trip DTC P0603 displayed again?

    YES

    Replace ECM. Refer to Removal and Installation .

    NO

    INSPECTION END

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