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Home >> Lexus >> 2008 >> GS 450h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System And Circuit Testing, On-Vehicle Inspection, Removal, Inspection & Installation >> Camshaft Timing Oil Control Valve Assembly >> On-Vehicle Inspection

On-Vehicle Inspection

  1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY 
    1. Connect the Techstream to the DLC3.
      1. Turn the power switch ON (IG).
      2. Turn the Techstream main switch ON.
      3. Set the vehicle to the "INSPECTION MODE" (see INSPECTION MODE PROCEDURE ).
    2. Start and warm up the engine.
    3. Idle the engine.
    4. Select the following menus: Powertrain / Engine / Active Test / Control the VVT Linear (Bank 1) or Control the VVT Linear (Bank 2) or Control the VVT System (Bank 1) or Control the VVT System (Bank 2) or Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2).

    Specified condition 

    TESTER OPERATION AND SPECIFIED CONDITION

    Tester Operation Specified Condition
    OCV OFF Normal engine speed
    OCV ON Engine Idles roughly or stalls soon after OCV is switched from OFF to ON

    If the result is not as specified, check the oil control valve and wirings.

    HINT:

    • Control the VVT Linear (Bank 1): Command to activate exhaust and intake side oil control valves of bank 1 (Control range: Between -128 to 127%).
    • Control the VVT Linear (Bank 2): Command to activate exhaust and intake side oil control valves of bank 2 (Control range: Between -128 to 127%).
    • Control the VVT System (Bank 1): Command to activate oil control valve of bank 1 (Control range: ON/OFF).
    • Control the VVT System (Bank 2): Command to activate oil control valve of bank 2 (Control range: ON/OFF).
    • Control the VVT Exhaust Linear (Bank 1): Command to activate exhaust side oil control valve of bank 1 (Control range: Between -128 to 127%).
    • Control the VVT Exhaust Linear (Bank 2): Command to activate exhaust side oil control valve of bank 2 (Control range: Between -128 to 127%).