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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P1089, P1092: VVEL Control Shaft Position Sensor >> Diagnosis Procedure >> Diagnostic Test
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Diagnostic Test

  1. VVEL CONTROL SHAFT POSITION SENSOR POWER SUPPLY CIRCUIT

    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.
      DTC No. VVEL control shaft position sensor Ground Voltage (V)
      Bank Connector Terminal
      P1089 1 F72 3 Ground Approx. 5
      6
      P1092 2 F70 3
      6

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness for open or short between VVEL control shaft position sensor and VVEL control module
    • Loose or poor connection for each connector and harness

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

  3. CHECK VVEL CONTROL SHAFT POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

    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.
      DTC No. VVEL control shaft position sensor VVEL control module Continuity
      Bank Connector Terminal Connector Terminal
      P1089 1 F72 2 F56 6 Existed
      5 19
      P1092 2 F70 2 4
      5 17
    4. Also check harness for short to ground and power.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness for open or short between VVEL control shaft position sensor and VVEL control module
    • Loose or poor connection for each connector and harness

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

  5. VVEL CONTROL SHAFT POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

    1. Check the continuity between VVEL control shaft position sensor harness connector and VVEL control module harness connector.
      DTC No. VVEL control shaft position sensor VVEL control module Continuity
      Bank Connector Terminal Connector Terminal
      P1089 1 F72 1 F56 3 Existed
      4 16
      P1092 2 F70 1 5
      4 18
    2. Also check harness for short to ground and power.

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    GO TO STEP 6  .

  6. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness for open or short between VVEL control shaft position sensor and VVEL control module
    • Loose or poor connection for each connector and harness

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

  7. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace.

  8. REPLACE VVEL CONTROL MODULE

    1. Replace VVEL control module.
    2. Perform additional service when replacing VVEL control module. Refer to DESCRIPTION .

    GO TO STEP 9  .

  9. PERFORM DTC CONFIRMATION PROCEDURE

    1. Turn ignition switch ON.
    2. Erase DTC.
    3. Perform DTC Confirmation Procedure.

      See DTC LOGIC .

    Is the DTC P1089 or P1092 displayed again?

    YES 

    GO TO STEP 10  .

    NO 

    INSPECTION END

  10. REPLACE VVEL ACTUATOR LADDER ASSEMBLY

    Replace VVEL actuator ladder assembly. Refer to REMOVAL AND INSTALLATION .

    INSPECTION END

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