2012 Lexus IS 350 Base, AWDFACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

  1. INSPECT CHECK VVT SENSOR OUTPUT VOLTAGE 
    Fig 1: Identifying VVT Sensor Connectors & Terminals
    GTY129331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the engine switch on (IG).
    2. Check the voltage between the terminal.

      Standard voltage

      Tester Connection Condition Specified Condition
      E3-23 (VCV1) - Body ground Engine switch on (IG) 5 V
      E3-20 (VCV2) - Body ground Engine switch on (IG) 5 V
      E6-22 (VCE1) - Body ground Engine switch on (IG) 5 V
      E6-19 (VCE2) - Body ground Engine switch on (IG) 5 V
    3. While turning the crankshaft pulley by hand, measure the voltage between each terminal. Check that the voltage changes between the Hi range and Lo range shown in the table below.

      Standard voltage

      Sensor Position Terminal No. Voltage (Hi) Voltage (Lo)
      Bank 1 (Intake side) VV1+ (E3-21) - VV1- (E3-22) 3.75 to 4.50 V 0.50 to 1.25 V
      Bank 2 (Intake side) VV2+ (E3-18) - VV2- (E3-19) 3.75 to 4.50 V 0.50 to 1.25 V
      Bank 1 (Exhaust side) EV1+ (E6-24) - EV1- (E6-23) 3.75 to 4.50 V 0.50 to 1.25 V
      Bank 2 (Exhaust side) EV2+ (E6-21) - EV2- (E6-20) 3.75 to 4.50 V 0.50 to 1.25 V
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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