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Home >> Infiniti >> 2017 >> Q50 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 568 (Power Control System (Diagnostics)) >> Component Parts/Circuit Diagnosis >> Push-Button Ignition Switch >> Diagnosis Procedure >> VR30DDTT engine
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VR30DDTT engine

WARNING: This page is about a different car, the 2020 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 1 
    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch connector and IPDM E/R connector.
    3. Check voltage between push-button ignition switch harness connector and ground.

      (+)

      (-)

      Voltage

      Push-button ignition switch

      Connector

      Terminal

      M38

      8

      Ground

      9 - 16 V

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 1 
    1. Disconnect BCM connector.
    2. Check continuity between BCM harness connector and push-button ignition switch harness connector.

      BCM

      Push-button ignition switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M13

      1

      M38

      8

      Existed

    3. Check continuity between BCM harness connector and ground.

      BCM

      Ground

      Continuity

      Connector

      Terminal

      M13

      1

      Not existed

    Is the inspection result normal?

    YES

    Replace BCM. Refer to BCM : Removal & Installation .

    NO

    Repair or replace harness.

  3. CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 2 
    1. Disconnect BCM connector.
    2. Connect IPDM E/R connector.
    3. Check voltage between IPDM E/R harness connector and ground.

      (+)

      (-)

      Voltage

      IPDM E/R

      Connector

      Terminal

      E121

      38

      Ground

      6 - 16 V

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 4.

  4. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 2 
    1. Check continuity between IPDM E/R harness connector and push-button ignition switch harness connector.

      IPDM E/R

      Push-button ignition switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E121

      38

      M38

      8

      Existed

    2. Check continuity between IPDM E/R harness connector and ground.

      IPDM E/R

      Ground

      Continuity

      Connector

      Terminal

      E121

      38

      Not existed

    Is the inspection result normal?

    YES

    Replace IPDM E/R. Refer to IPDM E/R : Removal & Installation .

    NO

    Repair or replace harness.

  5. CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT 

    Check continuity between push-button ignition switch harness connector and ground.

    Push-button ignition switch

    Ground

    Continuity

    Connector

    Terminal

    M38

    4

    Existed

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace harness.

  6. CHECK PUSH-BUTTON IGNITION SWITCH 

    Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Replace push-button ignition switch. Refer to PUSH-BUTTON IGNITION SWITCH : Removal & Installation .

  7. CHECK INTERMITTENT INCIDENT 

    Refer to Inspection .

    INSPECTION END