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Home >> Nissan-Datsun >> 2017 >> 370Z Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 3) >> DTC / Circuit Diagnosis >> Power Supply And Ground Circuit (VVEL Control Module) >> Diagnosis Procedure >> Diagnostic Test
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Diagnostic Test

  1. CHECK GROUND CONNECTION

    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in CIRCUIT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace ground connection.

  2. CHECK VVEL CONTROL MODULE GROUND CIRCUIT FOR OPEN AND SHORT

    1. Disconnect VVEL control module harness connector.
    2. Check the continuity between VVEL control module harness connector and ground.
      VVEL control module Ground Continuity
      Connector Terminal
      E15 14 Ground Existed
    3. Also check harness for short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair open circuit, short to power in harness connectors.

  3. CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-I

    1. Reconnect VVEL control module harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between VVEL control module harness connector and ground.
      VVEL control module Voltage
      Connector + -
      Terminal Terminal
      E15 8 14 After turning ignition switch OFF, battery voltage will exist for a few seconds, then drop to approximately 0 V.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-II

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Disconnect VVEL control module harness connector.
    3. Disconnect IPDM E/R harness connector.
    4. Check the continuity between VVEL control module harness connector and IPDM E/R harness connector.
      VVEL control module IPDM E/R Continuity
      Connector Terminal Connector Terminal
      E15 8 E7 49 Existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    DIAGNOSIS PROCEDURE 

    NO 

    Repair open circuit, short to ground or short to power in harness or connectors.

  5. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    Replace IPDM E/R.

    NO 

    Repair open circuit, short to ground or short to power in harness or connectors.

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