LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2011 >> G25 x >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Engine Control System - G37 Convertible - Introduction (1 Of 2)) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit (VVEL Control Module) >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Infiniti G37. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connections M95, E46. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: Go to 2.

      NO: Repair or replace ground connection.

  2. CHECK ECM 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.
      CONTINUITY REFERENCE CHART

      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 3.

      NO: Repair open circuit or 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.
      VOLTAGE REFERENCE CHART

      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 4.

      NO: Go to  5.

  4. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair open circuit, short to ground or short to power in harness or connectors.

  5. CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Check the voltage between ECM harness connector terminals.
      VOLTAGE REFERENCE CHART

      ECM Voltage
      + -
      Connector Terminal Connector Terminal
      F101 24 M107 128 Battery voltage

      Is the inspection result normal? 

      YES: Go to  9.

      NO: Go to 6.

  6. CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-III
    1. Disconnect ECM harness connector.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
      CONTINUITY REFERENCE CHART

      ECM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      F101 24 E7 69 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: Go to 8

      NO: Go to 7.

  7. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness or connectors E3, F1
    • Harness for open or short between ECM and IPDM E/R

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

  8. CHECK 15 A FUSE
    1. Disconnect 15 A fuse (No. 50) from IPDM E/R.
    2. Check 15 A fuse.

      Is the inspection result normal? 

      YES: Go to 9.

      NO: Replace 15A fuse.

  9. CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-IV
    1. Disconnect ECM harness connector.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
      CONTINUITY REFERENCE CHART

      ECM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      M107 125 E7 49 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: Go to  11.

      NO: Go to 10.

  10. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness or connectors E106, M6
    • Harness for open or short between ECM and IPDM E/R

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

  11. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair open circuit, short to ground or short to power in harness or connectors.

scientia non olet · About LEMON Manuals