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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Drive Mode System (DTC/Circuit Diagnosis) >> Circuit Diagnosis >> Drive Mode Select Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK DRIVE MODE SELECT SWITCH SIGNAL CIRCUIT 
    1. Ignition switch OFF.
    2. Disconnect drive mode switch harness connector and chassis control module harness connector.
    3. Check the continuity between drive mode switch harness connector and chassis control module harness connector.
      Drive mode switch Chassis control module Continuity
      Connector Terminal Connector Terminal
      M321 3 M96 6 Existed
      7 5
    4. Also check harness for short to ground and to power.

    Is the inspection result normal?

    >>

    GO TO 2.

    >>

    Repair / replace harness or connector.

  2. CHECK DRIVE MODE SELECT SWITCH GROUND CIRCUIT 

    Check the continuity between drive mode switch harness connector and ground.

    Drive mode switch - Continuity
    Connector Terminal
    M321 4 Ground Existed

    Is the inspection result normal?

    >>

    GO TO 3.

    >>

    Repair / replace harness or connector.

  3. CHECK DRIVE MODE SELECT SWITCH 

    Check drive mode select switch. Refer to Component Inspection .

    Is the inspection result normal?

    >>

    INSPECTION END

    >>

    Replace drive mode select switch. Refer to Removal and Installation .