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Home >> Infiniti >> 2021 >> QX50 Pure, 4WD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Distribution System >> DTC/Circuit Diagnosis >> Push-Button Ignition Switch >> Diagnosis Procedure >> Power Distribution System

Power Distribution System

  1. CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL (PUSH-BUTTON IGNITION SWITCH) 
    1. Ignition switch OFF.
    2. Disconnect push-button ignition switch connector and IPDM E/R connector.
    3. Check voltage between push-button ignition switch connector and ground.

      Push-button ignition switch

      --

      Voltage

      (Approx.)

      Connector

      Terminal

      M17

      5

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

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

      BCM

      Push-button ignition switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M19

      89

      M17

      5

      Yes

    3. Check continuity between BCM connector and ground.

      BCM

      --

      Continuity

      Connector

      Terminal

      M19

      89

      Ground

      No

    Is the inspection result normal?

    YES

    Replace BCM. Refer to Removal and Installation .

    NO

    Repair or replace harness or connectors.

  3. CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R) 

    Check voltage between IPDM E/R connector and ground.

    IPDM E/R

    --

    Voltage

    (Approx.)

    Connector

    Terminal

    E120

    32

    Ground

    Battery voltage

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 4.

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

      IPDM E/R

      Push-button ignition switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E120

      32

      M17

      5

      Yes

    3. Check continuity between IPDM E/R connector and ground.

      IPDM E/R

      --

      Continuity

      Connector

      Terminal

      E120

      32

      Ground

      No

    Is the inspection result normal?

    YES

    Refer to Intermittent Incident .

    NO

    Repair or replace harness or connectors.

  5. CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT 

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

    Push-button ignition switch

    --

    Continuity

    Connector

    Terminal

    M17

    4

    Ground

    Yes

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace harness or connectors.

  6. CHECK PUSH-BUTTON IGNITION SWITCH 

    Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Refer to Intermittent Incident .

    NO

    Replace push-button ignition switch. Refer to Removal and Installation .