2005 Scion tC AutomaticFACTORY OEM SERVICE PROCEDURE

Ignition System (2AZ-FE): Inspection

  1. INSPECT SPARK PLUG 
    1. Check the appearance.
      1. Check the spark plug for any damage on its thread and insulator.

      If there is any damage, replace the spark plug.

      Recommended spark plug: 

      RECOMMENDED SPARK PLUG REFERENCE

      Supplier Type
      DENSO SK20R11
      NGK IFR6A11
      Fig 1: Checking Spark Plug Damage
      G03073866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the electrode gap.
      1. Standard: 1.0 to 1.1 mm (0.039 to 0.043 in.) for new spark plug 
      2. Maximum: 1.3 mm (0.051 in.) for used spark plug 

    If the result is greater than maximum, replace the spark plug.

    Fig 2: Identifying Spark Plug Electrode Gap
    G03073867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT CAMSHAFT POSITION SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      CAMSHAFT POSITION SENSOR TERMINALS RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 (G+) - 2 (G-) 835 to 1,400 Ω at cold
      1 (G+) - 2 (G-) 1,060 to 1,645 Ω at hot
    NOTE: Cold and Hot mean the temperature of the coils themselves. Cold is from -10 to 50°C (14 to 122°F) and Hot is from 50 to 100°C (122 to 212°F).

    If the result is not as specified, replace the camshaft position sensor.

    Fig 3: Measuring Camshaft Position Sensor Resistance
    G03073868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT CRANKSHAFT POSITION SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      CRANKSHAFT POSITION SENSOR TERMINALS RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 (Ne+) - 2 (Ne-) 985 to 1,600 Ω at cold
      1 (Ne+) - 2 (Ne-) 1,265 to 1,890 Ω at hot
    NOTE: Cold and Hot mean the temperature of the coils themselves. Cold is from -10 to 50°C (14 to 122°F) and Hot is from 50 to 100°C (122 to 212°F).

    If the result is not as specified, replace the crankshaft position sensor.

    Fig 4: Measuring Crankshaft Position Sensor Resistance
    G03073869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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