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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Control System - DTCS P0460 Through P1211) >> DTC P1091: VVEL Actuator Motor Relay >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.
  1. VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-I 
    1. Turn ignition switch OFF.
    2. Disconnect VVEL actuator motor relay.
    3. Check the voltage between VVEL actuator motor relay harness connector and ground.
      VVEL actuator motor relay Ground Voltage
      Connector Terminal
      E90 1 Ground Battery voltage
      5

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • 50A fusible link (letter G)
    • Harness for open or short between VVEL actuator motor relay and battery

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

  3. VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-II 
    1. Disconnect VVEL control module harness connector.
    2. Check the continuity between VVEL actuator motor relay harness connector and VVEL control module harness connector.
      VVEL control module VVEL actuator motor relay Continuity
      Connector Terminal Connector Terminal
      E16 23 E90 2 Existed
    3. Also check harness for short to ground and power.

      Is the inspection result normal? 

      YES: GO TO 4.

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

  4. VVEL ACTUATOR MOTOR RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check the continuity between VVEL actuator motor relay harness connector and VVEL control module harness connector.
      VVEL control module VVEL actuator motor relay Continuity
      Bank Connector Terminal Connector Terminal
      1 E16 13 E90 3 Existed
      2 1
    2. Also check harness for short to ground and power.

      Is the inspection result normal? 

      YES: GO TO 5.

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

  5. CHECK VVEL ACTUATOR MOTOR RELAY 

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Replace VVEL actuator motor relay.

  6. CHECK ABORT CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check the continuity between VVEL control module harness connector and ECM harness connector.
      VVEL control module ECM Continuity
      Connector Terminal Connector Terminal
      E16 21 F111 65 Existed
    3. Also check harness for short to ground and power.

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: GO TO 7.

  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F10, E10
    • Harness for open and short between ECM and VVEL control module

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

  8. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: GO TO 9.

    NO: Repair or replace.

  9. REPLACE VVEL CONTROL MODULE 
    1. Replace VVEL control module.
    2. Perform "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (VVEL CONTROL MODULE): SPECIAL REPAIR REQUIREMENT ".

      : GO TO 10.

  10. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Turn ignition switch ON.
    2. Erase DTC.
    3. Perform DTC Confirmation Procedure.

      See "DTC LOGIC ".

      Is the DTC P1091 displayed again? 

      YES: GO TO 11.

      NO: INSPECTION END

  11. REPLACE ECM 
    1. Replace ECM.
    2. Perform "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM): SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

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