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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P1800: VIAS Control Solenoid Valve 1 >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK VIAS CONTROL SOLENOID VALVE 1 POWER SUPPLY

    1. Turn ignition switch OFF.
    2. Disconnect VIAS control solenoid valve 1 harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between VIAS control solenoid valve 1 harness connector and ground.
      VIAS control solenoid valve 1 Ground Voltage
      Connector Terminal
      F66 1 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

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

  2. CHECK VIAS CONTROL SOLENOID VALVE 1 OUTPUT SIGNAL CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between VIAS control solenoid valve 1 harness connector and ECM harness connector.
      VIAS control solenoid valve 1 ECM Continuity
      Connector Terminal Connector Terminal
      F66 2 F79 108 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

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

  3. CHECK VIAS CONTROL SOLENOID VALVE 1

    Check VIAS control solenoid valve 1. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Replace VIAS control solenoid valve 1. Refer to COMPONENT PARTS LOCATION .