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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Control System - DTCS P1212 Through P2138) >> DTC P1608: VVEL Sensor Power Supply >> 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. 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 2.

      NO: Repair or replace ground connection.

  2. CHECK VVEL CONTROL SHAFT POSITION SENSOR POWER SUPPLY CIRCUIT-I 
    1. Disconnect VVEL control shaft position sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between VVEL control shaft position sensor harness connector and ground.
      VVEL control shaft position sensor Ground Voltage
      Bank Connector Terminal
      1 F72 3 Ground Approx. 5V
      6
      2 F70 3
      6

      Is the inspection result normal? 

      YES: GO TO  7.

      NO: GO TO 3.

  3. CHECK VVEL CONTROL SHAFT POSITION SENSOR POWER SUPPLY CIRCUIT-II 
    1. Turn ignition switch OFF.
    2. Disconnect VVEL control module harness connector.
    3. Check the continuity between VVEL control shaft position sensor harness connector and VVEL control module harness connector.
      VVEL control shaft position sensor VVEL control module Continuity
      Bank Connector Terminal Connector Terminal
      1 F72 3 E16 7 Existed
      6 20
      2 F70 3 9
      6 22
    4. Also check harness for short to ground and power.

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F10, E10
    • Harness for open or short between VVEL control shaft position sensor and VVEL control module

      : 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: GO TO 6.

    NO: Repair or replace.

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

      : INSPECTION END

  7. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: GO TO 8.

    NO: Repair or replace.

  8. REPLACE VVEL ACTUATOR SUB ASSEMBLY 
    1. Replace VVEL actuator sub assembly.
    2. Perform "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

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